From 53ebf1f39c51361282ca55e18c83fbffed2f9a34 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 14:40:54 -0500
Subject: [PATCH 01/41] fix(pathops): sanitize a brush's width profile once
 before sampling (#1948)

---
 crates/pathops/src/brush.rs       |  4 +++-
 crates/pathops/src/brush_tests.rs | 11 +++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/crates/pathops/src/brush.rs b/crates/pathops/src/brush.rs
index bfd7f9212..b5875d4a2 100644
--- a/crates/pathops/src/brush.rs
+++ b/crates/pathops/src/brush.rs
@@ -131,7 +131,9 @@ pub fn outline(path: &BezPath, width: f64, props: &StrokeProps, brush: &Brush) -
     let p = preset(&brush.preset)?;
     let unit = shape(p.id)?;
     let lines = polylines(path)?;
-    let scale = |t: f64| width * props.profile().map_or(1.0, |pr| pr.scale_at(t));
+    // Sanitized once: at most 64 points, so each sample's symmetry scan stays cheap.
+    let profile = props.profile().map(|pr| pr.sanitized());
+    let scale = |t: f64| width * profile.as_ref().map_or(1.0, |pr| pr.scale_at(t));
     let mut out = BezPath::new();
     match p.kind {
         BrushKind::Stretch => {
diff --git a/crates/pathops/src/brush_tests.rs b/crates/pathops/src/brush_tests.rs
index 403935ddd..81cc55e10 100644
--- a/crates/pathops/src/brush_tests.rs
+++ b/crates/pathops/src/brush_tests.rs
@@ -72,3 +72,14 @@ fn a_width_profile_scales_the_brush() {
     let (first, last) = (parts.first().unwrap().bounding_box(), parts.last().unwrap().bounding_box());
     assert!(last.width() > first.width() * 3.0, "{first:?} {last:?}");
 }
+
+#[test]
+fn an_unsanitized_profile_is_bounded_before_sampling() {
+    // 100k points, all past the 64-point cap and out of range: the brush reads the clamped profile.
+    let raw = WidthProfile { points: (0..100_000).map(|i| figcraft_doc::WidthPoint::new(f64::from(i), 1e300)).collect() };
+    let b = brush("taper");
+    let mut p = props(1.0, &b);
+    p.width_profile = Some(raw);
+    let out = outline(&line(50.0), 1.0, &p, &b).unwrap();
+    assert!(out.bounding_box().height() <= 2.0 * WidthProfile::MAX_SCALE);
+}

From cfb29a4a9617b75f9072188c15ad1e24307850f8 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 17:58:09 -0500
Subject: [PATCH 02/41] perf(text): compute each glyph's cluster end once per
 run (#1963)

---
 crates/text/src/layout.rs | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/crates/text/src/layout.rs b/crates/text/src/layout.rs
index f2c587206..dd728916b 100644
--- a/crates/text/src/layout.rs
+++ b/crates/text/src/layout.rs
@@ -1698,11 +1698,22 @@ fn shape_segment(chars: &[char], seg: &Segment, face: &Arc<Face>, features: &[Fe
     }
     let (script_scale, script_shift) = synth.map_or((1.0, 0.0), |(_, up)| if up { face.superscript } else { face.subscript });
     let n = raw.len();
+    // Cluster end: the next larger cluster value, else the segment end. A glyph in the same
+    // cluster as the next one shares its end, so many glyphs of one cluster aren't rescanned.
+    let mut cends = vec![0usize; n];
+    for gi in (0..n).rev() {
+        let Some(&(_, cl, ..)) = raw.get(gi) else { continue };
+        let cl = cl as usize;
+        let shared = raw.get(gi + 1).filter(|r| r.1 as usize == cl).and_then(|_| cends.get(gi + 1).copied());
+        let cend = shared.unwrap_or_else(|| raw.iter().skip(gi + 1).map(|r| r.1 as usize).find(|c| *c > cl).unwrap_or(end).max(cl + 1));
+        if let Some(slot) = cends.get_mut(gi) {
+            *slot = cend;
+        }
+    }
     for gi in 0..n {
         let Some(&(gid, cl, xa, xo, yo)) = raw.get(gi) else { continue };
         let cl = cl as usize;
-        // Cluster end: the next larger cluster value, else the segment end.
-        let cend = raw.iter().skip(gi + 1).map(|r| r.1 as usize).find(|c| *c > cl).unwrap_or(end).max(cl + 1);
+        let cend = cends.get(gi).copied().unwrap_or(cl + 1);
         let last_in_cluster = raw.get(gi + 1).is_none_or(|r| r.1 as usize != cl);
         let ch = chars.get(cl).copied().unwrap_or(' ');
         let scale = if small_at(cl) { SMALL_CAP_SCALE } else { 1.0 } * script_scale;

From fb4d0b50352e97debc98b212ba6e2795a6c3d4b6 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 17:58:27 -0500
Subject: [PATCH 03/41] perf(doc,engine): rebuild a widget by removing its
 children in one pass (#1967)

---
 crates/doc/src/lib.rs                   | 13 +++++++++++++
 crates/doc/src/tests.rs                 | 14 ++++++++++++++
 crates/engine/src/extensions/widgets.rs |  4 +---
 3 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/crates/doc/src/lib.rs b/crates/doc/src/lib.rs
index 89eb97269..0181ffd21 100644
--- a/crates/doc/src/lib.rs
+++ b/crates/doc/src/lib.rs
@@ -574,6 +574,19 @@ impl Document {
         Ok(())
     }
 
+    /// Remove every child of `id` with its subtree, in one pass over `id`'s child list (removing
+    /// them one by one would search that list once per child).
+    pub fn remove_children(&mut self, id: NodeId) -> DocResult<()> {
+        let kids = std::mem::take(&mut self.get_mut(id)?.children);
+        for c in kids {
+            for d in self.subtree(c) {
+                self.nodes.remove(&d);
+                self.dirty.touch(d);
+            }
+        }
+        Ok(())
+    }
+
     /// Whether sections may go in `parent`: a page or another section (never a frame or a group).
     pub fn takes_sections(&self, parent: NodeId) -> bool {
         self.node(parent).is_some_and(|p| p.is_page() || matches!(p.kind, NodeKind::Section { .. }))
diff --git a/crates/doc/src/tests.rs b/crates/doc/src/tests.rs
index a0e3e17b0..a5c8e8e7a 100644
--- a/crates/doc/src/tests.rs
+++ b/crates/doc/src/tests.rs
@@ -846,3 +846,17 @@ fn the_colour_walker_visits_calculation_literals() {
     let ColorOperand::Literal { literal } = from else { panic!("literal operand") };
     assert_eq!(literal.a, 0.5, "the mix's stored literal was converted like every other colour");
 }
+
+#[test]
+fn remove_children_removes_every_subtree_and_keeps_the_parent() {
+    let mut doc = Document::new("T");
+    let page = doc.first_page().unwrap();
+    let frame = doc.create(page, NodeKind::Frame, "F", 0.0, 0.0, 100.0, 100.0).unwrap();
+    let inner = doc.create(frame, NodeKind::Frame, "Inner", 0.0, 0.0, 10.0, 10.0).unwrap();
+    let leaf = doc.create(inner, NodeKind::Rectangle, "Leaf", 0.0, 0.0, 5.0, 5.0).unwrap();
+    let other = doc.create(page, NodeKind::Rectangle, "Other", 0.0, 0.0, 5.0, 5.0).unwrap();
+    doc.remove_children(frame).unwrap();
+    assert!(doc.contains(frame) && doc.contains(other));
+    assert!(!doc.contains(inner) && !doc.contains(leaf));
+    assert!(doc.get(frame).unwrap().children.is_empty());
+}
diff --git a/crates/engine/src/extensions/widgets.rs b/crates/engine/src/extensions/widgets.rs
index 6386ceab4..498fbeb8a 100644
--- a/crates/engine/src/extensions/widgets.rs
+++ b/crates/engine/src/extensions/widgets.rs
@@ -243,9 +243,7 @@ fn build(s: &mut Session, plugin: &str, w: NodeId, r: &WidgetRender) -> Result<(
     if !is_widget(n) || n.plugin_data.get(PLUGIN).map(String::as_str) != Some(plugin) {
         return Err(bad(cmd, "the layer is no longer this plugin's widget"));
     }
-    for c in n.children.clone() {
-        doc.remove(c)?;
-    }
+    doc.remove_children(w)?;
     crate::cmd::props::apply(cmd, doc, w, &props(&r.root, true))?;
     let n = doc.get_mut(w)?;
     n.locked = false;

From 3265cbca404644c70fb08035536882960d9f15c3 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 17:58:39 -0500
Subject: [PATCH 04/41] perf(engine): look up a component's asset root once per
 usage report, and skip mode migration without instances (#1966)

---
 crates/engine/src/assets/components.rs     | 4 ++++
 crates/engine/src/assets/library_server.rs | 5 ++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/crates/engine/src/assets/components.rs b/crates/engine/src/assets/components.rs
index cee9b0bb2..7ddb22427 100644
--- a/crates/engine/src/assets/components.rs
+++ b/crates/engine/src/assets/components.rs
@@ -147,6 +147,10 @@ pub fn inside_instance(doc: &Document, id: NodeId) -> bool {
 /// main layer's, for files from before `modes` was an override group. Copies follow their main
 /// layer's modes, so a layer on other modes chose them itself.
 pub fn mark_layer_modes(doc: &mut Document) {
+    // Without an instance nothing can be inside one: skip the per-layer ancestry lookups.
+    if !doc.nodes().any(|n| matches!(n.kind, NodeKind::Instance { .. })) {
+        return;
+    }
     let chose: Vec<NodeId> = doc
         .nodes()
         .filter(|n| !n.overrides.contains("modes") && n.source.and_then(|s| doc.node(s)).is_some_and(|m| m.var_modes != n.var_modes))
diff --git a/crates/engine/src/assets/library_server.rs b/crates/engine/src/assets/library_server.rs
index 47d15a954..81889be5d 100644
--- a/crates/engine/src/assets/library_server.rs
+++ b/crates/engine/src/assets/library_server.rs
@@ -79,10 +79,13 @@ pub fn usage(doc: &Document, library: &str) -> Usage {
     let records: std::collections::BTreeMap<NodeId, NodeId> =
         doc.libraries.components.iter().filter(|r| r.library == library).map(|r| (r.root, r.key)).collect();
     if !records.is_empty() {
+        // One component's asset root is looked up once, however many instances use it.
+        let mut roots = std::collections::BTreeMap::<NodeId, Option<NodeId>>::new();
         for n in doc.nodes() {
             if let NodeKind::Instance { component, .. } = &n.kind
                 && store.is_none_or(|st| doc.page_of(n.id) != Some(st))
-                && let Some(key) = crate::library::asset_root(doc, *component).and_then(|r| records.get(&r))
+                && let Some(key) =
+                    roots.entry(*component).or_insert_with(|| crate::library::asset_root(doc, *component)).and_then(|r| records.get(&r))
             {
                 let c = counts.entry(*key).or_default();
                 *c = c.saturating_add(1);

From 4bb35d5266aae4dfb156cd85561c4d81198cddd9 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 17:58:51 -0500
Subject: [PATCH 05/41] perf(collab): check a replaced list's entries against
 sets, not a scan per entry (#1962)

---
 crates/collab/src/change.rs | 11 +++++++++++
 crates/collab/src/server.rs | 14 ++++++++++----
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/crates/collab/src/change.rs b/crates/collab/src/change.rs
index bcc09ad86..442376f37 100644
--- a/crates/collab/src/change.rs
+++ b/crates/collab/src/change.rs
@@ -333,6 +333,17 @@ impl Change {
 }
 
 impl Entry {
+    /// The synced list this entry belongs to (`None` for entries kept in maps).
+    pub(crate) fn family(&self) -> Option<Family> {
+        match self {
+            Entry::Style(_) => Some(Family::Styles),
+            Entry::Comment(_) => Some(Family::Comments),
+            Entry::Collection(_) => Some(Family::Collections),
+            Entry::Variable(_) => Some(Family::Variables),
+            Entry::DevSnapshot(_) | Entry::Image(_) | Entry::Ballot(_) => None,
+        }
+    }
+
     /// The client id space the entry's id lies in ([`figcraft_doc::ids`]): ids made during a live
     /// session carry their creator's client id, ids from before and ids of other forms are in
     /// space 0. `None` for entries keyed by something else (dev snapshots by layer, images by
diff --git a/crates/collab/src/server.rs b/crates/collab/src/server.rs
index b94cb5726..d5af681b2 100644
--- a/crates/collab/src/server.rs
+++ b/crates/collab/src/server.rs
@@ -6,7 +6,7 @@ use std::collections::{BTreeMap, BTreeSet, VecDeque};
 use figcraft_doc::{Document, NodeId};
 use serde::{Deserialize, Serialize};
 
-use crate::change::{Change, Entry, Prop, Target};
+use crate::change::{Change, Entry, Family, Prop, Target};
 use crate::message::{
     Accepted, Access, CatchUp, ClientMsg, Hello, PROTOCOL, Peer, Presence, Processed, Resume, ServerMsg, Signal, reads_comments, reads_signals,
 };
@@ -557,6 +557,7 @@ impl Server {
     fn check_entries(&self, from: u32, changes: &[Change], after: &Document) -> Result<Vec<(Entry, bool)>, Error> {
         let before = self.state.document();
         let mut touched: BTreeSet<Entry> = BTreeSet::new();
+        let mut listed: BTreeMap<Family, (BTreeSet<Entry>, BTreeSet<Entry>)> = BTreeMap::new();
         for c in changes {
             match c {
                 Change::Put { entry, .. } | Change::Remove { entry } if entry.id_space().is_some() => {
@@ -565,8 +566,10 @@ impl Server {
                 // A whole list replaced (the fallback for lists whose ids aren't unique).
                 Change::SetDoc { prop, .. } => {
                     if let Some(Ok(family)) = prop.list() {
-                        touched.extend(docprops::entries(before, family));
-                        touched.extend(docprops::entries(after, family));
+                        let (b, a) = (docprops::entries(before, family), docprops::entries(after, family));
+                        touched.extend(b.iter().chain(&a).cloned());
+                        // Looked up in sets below: a linear search per entry would be quadratic.
+                        listed.entry(family).or_insert_with(|| (b.into_iter().collect(), a.into_iter().collect()));
                     }
                 }
                 _ => {}
@@ -574,7 +577,10 @@ impl Server {
         }
         let mut out = Vec::new();
         for entry in touched {
-            let (was, now) = (docprops::has(before, &entry), docprops::has(after, &entry));
+            let (was, now) = match entry.family().and_then(|f| listed.get(&f)) {
+                Some((b, a)) => (b.contains(&entry), a.contains(&entry)),
+                None => (docprops::has(before, &entry), docprops::has(after, &entry)),
+            };
             if was == now {
                 continue;
             }

From 88851996a0932c2bc436550b2416524289044c40 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:22:03 -0500
Subject: [PATCH 06/41] fix(format): a saved file replaces its predecessor with
 the same permissions (#1957)

---
 crates/format/src/lib.rs           |  5 +++++
 crates/format/src/staging_tests.rs | 14 ++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/crates/format/src/lib.rs b/crates/format/src/lib.rs
index 3a69ca848..e2880a3ca 100644
--- a/crates/format/src/lib.rs
+++ b/crates/format/src/lib.rs
@@ -1028,6 +1028,11 @@ pub fn write_file_atomic(path: &std::path::Path, bytes: &[u8]) -> std::io::Resul
         let tmp = std::path::PathBuf::from(name);
         match std::fs::OpenOptions::new().write(true).create_new(true).open(&tmp) {
             Ok(mut file) => {
+                // The replacement keeps the destination's permissions from the start, so a private
+                // file's content is never readable under default ones (the open handle still writes).
+                if let Ok(old) = std::fs::metadata(path) {
+                    let _ = file.set_permissions(old.permissions());
+                }
                 if let Err(e) = file.write_all(bytes) {
                     let _ = std::fs::remove_file(&tmp);
                     return Err(e);
diff --git a/crates/format/src/staging_tests.rs b/crates/format/src/staging_tests.rs
index 1bc199e20..abf8eacdc 100644
--- a/crates/format/src/staging_tests.rs
+++ b/crates/format/src/staging_tests.rs
@@ -123,3 +123,17 @@ fn a_failed_write_leaves_the_destination_alone_and_cleans_up() {
     }
     let _ = std::fs::remove_dir_all(&d);
 }
+
+#[cfg(unix)]
+#[test]
+fn a_replaced_file_keeps_its_permissions() {
+    use std::os::unix::fs::PermissionsExt;
+    let d = dir("mode");
+    let path = d.join("a.figcraft");
+    std::fs::write(&path, b"old").unwrap();
+    std::fs::set_permissions(&path, std::fs::Permissions::from_mode(0o600)).unwrap();
+    write_file_atomic(&path, b"new").unwrap();
+    assert_eq!(std::fs::read(&path).unwrap(), b"new");
+    assert_eq!(std::fs::metadata(&path).unwrap().permissions().mode() & 0o777, 0o600);
+    let _ = std::fs::remove_dir_all(&d);
+}

From df07ac2d09f0e29d40170a58f70e4bf88a659790 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:23:03 -0500
Subject: [PATCH 07/41] fix(engine): never let document text close the
 generated HTML style element (#1955)

---
 crates/engine/src/dev/codegen/html.rs   |  5 ++++-
 crates/engine/src/html_codegen_tests.rs | 13 +++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/crates/engine/src/dev/codegen/html.rs b/crates/engine/src/dev/codegen/html.rs
index d1b144cae..ac23e6a5b 100644
--- a/crates/engine/src/dev/codegen/html.rs
+++ b/crates/engine/src/dev/codegen/html.rs
@@ -90,7 +90,10 @@ pub(super) fn html(doc: &Document, id: NodeId) -> String {
     let ctx = Ctx::new(doc, id);
     let mut out = Markup::new(&ctx, CodeLang::Html);
     out.node(id, None, 0, "");
-    format!("{}\n<style>\n{}{}</style>\n", out.markup, out.tokens.root_rule(), out.styles)
+    // Document text can reach the stylesheet through any property: `<\/` reads back as `</` inside a CSS
+    // string and can never close the element early.
+    let css = format!("{}{}", out.tokens.root_rule(), out.styles).replace("</", "<\\/");
+    format!("{}\n<style>\n{css}</style>\n", out.markup)
 }
 
 /// Markup being built for a layer tree: HTML (`class`), React JSX (`className`), Vue
diff --git a/crates/engine/src/html_codegen_tests.rs b/crates/engine/src/html_codegen_tests.rs
index cd1318ee0..ab7115554 100644
--- a/crates/engine/src/html_codegen_tests.rs
+++ b/crates/engine/src/html_codegen_tests.rs
@@ -163,3 +163,16 @@ fn rem_preserves_text_property_default() {
         }
     }
 }
+
+#[test]
+fn the_stylesheet_never_contains_a_closing_style_tag_from_document_text() {
+    let mut s = Session::new();
+    let f = id(s.execute("frame.create", &json!({"x": 0, "y": 0, "width": 100, "height": 100})).unwrap());
+    let t = id(s.execute("text.create", &json!({"text": "x", "x": 0, "y": 0})).unwrap());
+    s.execute("node.set", &json!({"id": t, "props": {"fontFamily": "a</style><script>alert(1)</script>"}})).unwrap();
+    s.execute("node.reparent", &json!({"ids": [t], "parent": f})).unwrap();
+    let code = code_for(s.doc().unwrap(), f, CodeLang::Html);
+    let (_, css) = code.split_once("<style>").unwrap();
+    assert_eq!(css.matches("</style>").count(), 1, "{code}");
+    assert!(!code.contains("<script>"), "{code}");
+}

From 417ad412a29642585573f29c13851e8d40c3f8f0 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:23:52 -0500
Subject: [PATCH 08/41] perf(engine): keep each events.poll topic once (#1935)

The topic list was validated but not deduplicated, and it is scanned for
every retained event while the log's lock is held, so a request repeating
one topic thousands of times multiplied that work. Repeats collapse and a
list naming all is just all.
---
 crates/engine/src/events.rs       | 7 +++++--
 crates/engine/src/events_tests.rs | 4 ++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/crates/engine/src/events.rs b/crates/engine/src/events.rs
index fbc1b9b6c..05433412c 100644
--- a/crates/engine/src/events.rs
+++ b/crates/engine/src/events.rs
@@ -127,12 +127,15 @@ pub fn topics(v: Option<&Value>) -> Result<Vec<String>, String> {
     for t in list {
         let Some(s) = t.as_str() else { return Err("`topics` must be an array of strings".into()) };
         match s {
+            // Each once: the list is scanned for every retained event under the log's lock, so
+            // a long list of repeats would multiply that work.
+            "comments" | "document" | "all" if out.iter().any(|t| t == s) => {}
             "comments" | "document" | "all" => out.push(s.to_string()),
             other => return Err(format!("unknown topic `{other}` (comments, document, all)")),
         }
     }
-    if out.is_empty() {
-        out.push("all".into());
+    if out.is_empty() || out.iter().any(|t| t == "all") {
+        out = vec!["all".into()];
     }
     Ok(out)
 }
diff --git a/crates/engine/src/events_tests.rs b/crates/engine/src/events_tests.rs
index 36b118a79..9cdef52ca 100644
--- a/crates/engine/src/events_tests.rs
+++ b/crates/engine/src/events_tests.rs
@@ -193,6 +193,10 @@ fn topics_parse_and_reject_unknown_names() {
     assert_eq!(events::topics(Some(&json!([]))).unwrap(), vec!["all".to_string()]);
     assert_eq!(events::topics(Some(&json!(["comments", "document"]))).unwrap(), vec!["comments".to_string(), "document".to_string()]);
     assert!(events::topics(Some(&json!(["nope"]))).is_err());
+    // Repeats collapse (the list is scanned per event under the log's lock), and `all` is all.
+    let many: Vec<&str> = std::iter::repeat_n("comments", 10_000).chain(["document"]).collect();
+    assert_eq!(events::topics(Some(&json!(many))).unwrap(), vec!["comments".to_string(), "document".to_string()]);
+    assert_eq!(events::topics(Some(&json!(["comments", "all", "document"]))).unwrap(), vec!["all".to_string()]);
     assert!(events::topics(Some(&json!("comments"))).is_err());
 }
 

From 3b4de34efea0b433f63aa8ec85991d378c41b35f Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:24:44 -0500
Subject: [PATCH 09/41] fix(doc): list a page once however often a file lists
 it (#1927)

Loading accepted a page id repeated in the pages list and repair kept the
repeats, so import, Fig and Penpot export and every page walk visited and
retained that page's subtree once per listing. validate now reports a
repeated page and repair drops the repeats.
---
 crates/doc/src/lib.rs   |  8 ++++++--
 crates/doc/src/tests.rs | 14 ++++++++++++++
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/crates/doc/src/lib.rs b/crates/doc/src/lib.rs
index 0181ffd21..1349aac1d 100644
--- a/crates/doc/src/lib.rs
+++ b/crates/doc/src/lib.rs
@@ -1098,6 +1098,9 @@ impl Document {
         // lookups: a wide parent or a long page list doesn't make validation quadratic.
         let edges: std::collections::BTreeSet<(NodeId, NodeId)> = self.nodes.iter().flat_map(|(p, n)| n.children.iter().map(|c| (*p, *c))).collect();
         let page_ids: std::collections::BTreeSet<NodeId> = self.pages.iter().copied().collect();
+        if page_ids.len() != self.pages.len() {
+            note(&mut issues, || "a page is listed twice".to_string());
+        }
         for (id, n) in self.nodes.iter() {
             if n.id != *id {
                 note(&mut issues, || format!("node key {id} has id {}", n.id));
@@ -1191,9 +1194,10 @@ impl Document {
         if store != self.libraries.store {
             Arc::make_mut(&mut self.libraries).store = store;
         }
-        self.pages.retain(|p| self.nodes.get(p).is_some_and(|n| n.is_page()) && Some(*p) != store);
+        // A page listed twice would be imported, exported and walked once per listing.
+        let mut listed = std::collections::BTreeSet::new();
+        self.pages.retain(|p| self.nodes.get(p).is_some_and(|n| n.is_page()) && Some(*p) != store && listed.insert(*p));
         // Unlisted pages join the list; a set keeps many pages from making this quadratic (#1078).
-        let mut listed: std::collections::BTreeSet<NodeId> = self.pages.iter().copied().collect();
         for (k, n) in self.nodes.iter() {
             if n.is_page() && Some(*k) != store && listed.insert(*k) {
                 self.pages.push(*k);
diff --git a/crates/doc/src/tests.rs b/crates/doc/src/tests.rs
index a5c8e8e7a..6ac6f455b 100644
--- a/crates/doc/src/tests.rs
+++ b/crates/doc/src/tests.rs
@@ -348,6 +348,20 @@ fn repair_drops_cycles_and_repeated_children() {
     assert_eq!(bad.subtree(p), vec![p, r]);
 }
 
+#[test]
+fn repair_lists_a_page_once_however_often_the_file_lists_it() {
+    let mut d = Document::new("x");
+    let p = page(&d);
+    let q = d.add_page("Two");
+    let mut v = serde_json::to_value(&d).unwrap();
+    v["pages"] = serde_json::json!([p, q, p, q, p]);
+    let mut bad: Document = serde_json::from_value(v).unwrap();
+    assert!(bad.validate().iter().any(|i| i.contains("listed twice")), "{:?}", bad.validate());
+    bad.repair();
+    assert!(bad.validate().is_empty(), "{:?}", bad.validate());
+    assert_eq!(bad.pages, vec![p, q]);
+}
+
 #[test]
 fn validate_caps_the_issue_list() {
     let mut d = Document::new("x");

From 9475a815daf0365cb7ae7b32af8a54de80ebe522 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:25:33 -0500
Subject: [PATCH 10/41] fix(layout): end the fill distribution loop when no
 child can freeze (#1926)

Each iteration froze the children whose clamping passed a 1e-9 tolerance,
but it compared the aggregate violation against the same tolerance: several
clampings each under it could add up past it, so no child froze, the
pending set never shrank and the loop never ended. An iteration that
freezes nothing now settles the remaining children as clamped.
---
 crates/layout/src/lib.rs   | 12 ++++++++++++
 crates/layout/src/tests.rs | 21 +++++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/crates/layout/src/lib.rs b/crates/layout/src/lib.rs
index 19de84afb..33ad233ff 100644
--- a/crates/layout/src/lib.rs
+++ b/crates/layout/src/lib.rs
@@ -629,14 +629,26 @@ fn distribute(items: &mut [Item], mut open: Vec<usize>, free: f64) {
             .collect();
         let violation: f64 = sized.iter().map(|(_, want, v)| v - want).sum();
         let frozen = |want: f64, v: f64| violation.abs() < 1e-9 || (violation > 0.0 && v > want + 1e-9) || (violation < 0.0 && v < want - 1e-9);
+        let mut progressed = false;
         for (i, want, v) in &sized {
             if frozen(*want, *v)
                 && let Some(it) = items.get_mut(*i)
             {
                 it.main = *v;
                 free -= *v;
+                progressed = true;
             }
         }
+        if !progressed {
+            // Several clampings each under the tolerance added up past it, so none froze: settle
+            // them all as clamped rather than go round again with nothing changed.
+            for (i, _, v) in &sized {
+                if let Some(it) = items.get_mut(*i) {
+                    it.main = *v;
+                }
+            }
+            break;
+        }
         free = free.max(0.0);
         open = sized.into_iter().filter(|(_, want, v)| !frozen(*want, *v)).map(|(i, _, _)| i).collect();
     }
diff --git a/crates/layout/src/tests.rs b/crates/layout/src/tests.rs
index 0af9861b8..d48c1fb8d 100644
--- a/crates/layout/src/tests.rs
+++ b/crates/layout/src/tests.rs
@@ -447,3 +447,24 @@ fn grid_hostile_values() {
         assert!(x.is_finite() && y.is_finite() && w.is_finite() && h.is_finite());
     }
 }
+
+#[test]
+fn fill_children_whose_tiny_clampings_add_up_past_the_tolerance_still_settle() {
+    // Three fill children sharing 300 px, each with a minimum 5e-10 over its 100 px share: no
+    // single clamping passes the 1e-9 tolerance, but together they do, so no child froze and the
+    // distribution loop went round forever without changing anything.
+    let mut d = Document::new("t");
+    let p = d.first_page().unwrap();
+    let f = d.create(p, NodeKind::Frame, "F", 0.0, 0.0, 300.0, 100.0).unwrap();
+    d.get_mut(f).unwrap().layout = Some(AutoLayout { mode: LayoutMode::Horizontal, gap: 0.0, padding: [0.0; 4], ..Default::default() });
+    let kids: Vec<NodeId> = (0..3).map(|i| d.create(f, NodeKind::Rectangle, "K", 0.0, 0.0, 10.0, 20.0 + i as f64).unwrap()).collect();
+    for k in &kids {
+        let n = d.get_mut(*k).unwrap();
+        n.child_layout.sizing_h = Sizing::Fill;
+        n.child_layout.min_w = Some(100.0 + 5e-10);
+    }
+    layout_frame(&mut d, f, &NoMeasure);
+    for k in &kids {
+        assert!((pos(&d, *k).2 - 100.0).abs() < 1e-6, "{:?}", pos(&d, *k));
+    }
+}

From 6da4c30cae91c32e8cd5932533d32151c2d5b4b4 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:26:21 -0500
Subject: [PATCH 11/41] fix(svg): refuse a document compressed twice and charge
 a refused embedded one (#1924)

One gzip layer is unpacked within the import budget, but usvg gunzips what
it is handed again with no limit, so a doubly compressed document or
embedded image expanded outside the budget. A compressed embedded image
that failed its budget also left the shared allowance untouched, so every
sibling image could repeat the work; a refusal now spends what was left.
---
 crates/svg/src/import/budget.rs       | 15 +++++++++++++-
 crates/svg/src/import/budget_tests.rs | 28 +++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/crates/svg/src/import/budget.rs b/crates/svg/src/import/budget.rs
index 75a5e6731..7de080af4 100644
--- a/crates/svg/src/import/budget.rs
+++ b/crates/svg/src/import/budget.rs
@@ -44,6 +44,11 @@ fn inflate(data: &[u8], limit: usize) -> Result<Vec<u8>, String> {
     if out.len() > limit {
         return Err(format!("compressed SVG expands past {} MiB", limit >> 20));
     }
+    // usvg gunzips what it is handed, with no limit: one layer is unpacked here, within the
+    // budget, and what comes out must be the document itself.
+    if gzipped(&out) {
+        return Err("compressed SVG holds another compressed file, not a document".into());
+    }
     Ok(out)
 }
 
@@ -72,7 +77,15 @@ fn embedded(used: &Used, limits: &Limits, data: &[u8], opts: &Options) -> Option
         return None;
     }
     let left = limits.embedded.saturating_sub(used.bytes.load(Ordering::Relaxed));
-    let plain = inflate(data, left).ok()?;
+    let plain = match inflate(data, left) {
+        Ok(plain) => plain,
+        // What a refused document unpacked before it was refused was work too: it uses up what is
+        // left, so the next image can't repeat it.
+        Err(_) => {
+            used.bytes.fetch_add(left, Ordering::Relaxed);
+            return None;
+        }
+    };
     used.bytes.fetch_add(plain.len(), Ordering::Relaxed);
     if super::too_deep(&plain) {
         return None;
diff --git a/crates/svg/src/import/budget_tests.rs b/crates/svg/src/import/budget_tests.rs
index d3dcd2dea..d8740f901 100644
--- a/crates/svg/src/import/budget_tests.rs
+++ b/crates/svg/src/import/budget_tests.rs
@@ -111,3 +111,31 @@ fn linked_files_and_other_mime_types_stay_unresolved() {
     );
     assert_eq!(layers(data.as_bytes(), Limits::default()).unwrap(), layers(svg("").as_bytes(), Limits::default()).unwrap());
 }
+
+#[test]
+fn a_document_compressed_twice_is_refused_not_unpacked_again() {
+    // One gzip layer is unpacked within the budget; usvg would unpack a second one without any.
+    let twice = gzip(&gzip(svg(&" ".repeat(1 << 20)).as_bytes()));
+    let e = layers(&twice, Limits { document: 4 << 20, ..Limits::default() }).unwrap_err();
+    assert!(e.contains("another compressed file"), "{e}");
+    // Embedded, the same is dropped.
+    let inner = svg(r##"<rect width="10" height="10"/>"##);
+    let data = svg(&format!(
+        r##"<image width="10" height="10" xlink:href="data:image/svg+xml;base64,{}"/>"##,
+        base64::engine::general_purpose::STANDARD.encode(gzip(&gzip(inner.as_bytes())))
+    ))
+    .into_bytes();
+    assert_eq!(layers(&data, Limits::default()).unwrap(), layers(svg("").as_bytes(), Limits::default()).unwrap());
+}
+
+#[test]
+fn a_refused_embedded_bomb_uses_up_the_budget_for_the_images_after_it() {
+    let bomb = gzip(svg(&" ".repeat(1 << 20)).as_bytes());
+    let inner = svg(r##"<rect width="10" height="10"/>"##);
+    let image = |href: String| format!(r##"<image width="10" height="10" xlink:href="{href}"/>"##);
+    let bomb_uri = format!("data:image/svg+xml;base64,{}", base64::engine::general_purpose::STANDARD.encode(&bomb));
+    let data = svg(&format!("{}{}", image(bomb_uri).repeat(8), image(uri(inner.as_bytes())))).into_bytes();
+    let limits = Limits { embedded: 4096, ..Limits::default() };
+    let empty = layers(svg("").as_bytes(), limits).unwrap();
+    assert_eq!(layers(&data, limits).unwrap(), empty, "the first bomb spends the allowance; nothing after it unpacks");
+}

From f54e099a4804bf565e38387f05d98c200a708a72 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:27:10 -0500
Subject: [PATCH 12/41] fix(mcp): render prompt placeholders in one pass over
 the template (#1922)

Each argument was substituted into the already rendered text, so a value
holding placeholders was expanded again by every later replacement and a
short request could grow the prompt without bound. The template is now
scanned once and argument text is never read as syntax.
---
 crates/mcp/src/prompts.rs | 46 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 2 deletions(-)

diff --git a/crates/mcp/src/prompts.rs b/crates/mcp/src/prompts.rs
index b9be1728a..59b4ee818 100644
--- a/crates/mcp/src/prompts.rs
+++ b/crates/mcp/src/prompts.rs
@@ -128,7 +128,7 @@ pub fn get(name: &str, args: &Value) -> Result<Value, String> {
     if !(args.is_object() || args.is_null()) {
         return Err("`arguments` must be an object of strings".into());
     }
-    let mut text = p.template.replace("{verify}", VERIFY);
+    let mut values: Vec<(&str, String)> = vec![("verify", VERIFY.to_string())];
     for a in p.args {
         let v = match args.get(a.name) {
             Some(Value::String(s)) if !s.trim().is_empty() => s.clone(),
@@ -142,7 +142,49 @@ pub fn get(name: &str, args: &Value) -> Result<Value, String> {
             Some(Value::String(_)) => p.defaults.iter().find(|(k, _)| *k == a.name).map(|(_, d)| (*d).to_string()).unwrap_or_default(),
             Some(_) => return Err(format!("argument `{}` must be a string", a.name)),
         };
-        text = text.replace(&format!("{{{}}}", a.name), &v);
+        values.push((a.name, v));
     }
+    // One pass over the template, so an argument's text is never read as `{…}` syntax itself (a
+    // value holding placeholders used to be expanded again by every later replacement).
+    let mut text = String::with_capacity(p.template.len());
+    let mut rest = p.template;
+    while let Some(open) = rest.find('{') {
+        text.push_str(rest.get(..open).unwrap_or_default());
+        let after = rest.get(open..).unwrap_or_default();
+        let found = after.find('}').and_then(|close| {
+            let key = after.get(1..close)?;
+            values.iter().find(|(k, _)| *k == key).map(|(_, v)| (close, v.as_str()))
+        });
+        match found {
+            Some((close, v)) => {
+                text.push_str(v);
+                rest = after.get(close + 1..).unwrap_or_default();
+            }
+            None => {
+                text.push('{');
+                rest = after.get(1..).unwrap_or_default();
+            }
+        }
+    }
+    text.push_str(rest);
     Ok(json!({"description": p.description, "messages": [{"role": "user", "content": {"type": "text", "text": text}}]}))
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn arguments_are_text_not_template_syntax() {
+        let text = |args: Value| get("mobile_screen", &args).unwrap()["messages"][0]["content"]["text"].as_str().unwrap().to_string();
+        let plain = text(json!({"screen": "login"}));
+        assert!(plain.contains("Design a login screen") && plain.contains("iPhone 16") && plain.ends_with(VERIFY), "{plain}");
+        assert!(!plain.contains("{screen}") && !plain.contains("{verify}"), "{plain}");
+        // A value made of placeholders stays as typed, however many there are: it is never
+        // expanded again by the replacements after it (that multiplied the output without bound).
+        let bomb = "{device}{brand_color}{verify}".repeat(1000);
+        let out = text(json!({"screen": bomb.clone()}));
+        assert!(out.contains(&bomb));
+        assert!(out.len() < 3 * bomb.len(), "{}", out.len());
+    }
+}

From b9b64a875557765962ed65ae21121ec221a13424 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:56:28 -0500
Subject: [PATCH 13/41] fix(render): check the nesting limit for mask content
 and bound GIF frame buffers (#1925)

* fix(render): check the nesting limit for mask content and bound GIF frame buffers

A mask's content is drawn straight from mask_pixels, not through
draw_layer, so masks nested inside masks recursed past the 256-level limit
and down the stack. GIF decoding budgeted frames by the logical canvas but
left the decoder's allocation limits off, so one frame descriptor could ask
for a gigabyte before the frame came back to be checked.

* address review: give the GIF decoder one frame of working room beyond the animation cap
---
 crates/render/src/draw.rs              |  5 +++++
 crates/render/src/gif_tests.rs         | 27 ++++++++++++++++++++++++++
 crates/render/src/images.rs            | 11 ++++++++++-
 crates/render/src/mask_bounds_tests.rs | 21 ++++++++++++++++++++
 4 files changed, 63 insertions(+), 1 deletion(-)

diff --git a/crates/render/src/draw.rs b/crates/render/src/draw.rs
index f0af6b6d0..5110b9dc0 100644
--- a/crates/render/src/draw.rs
+++ b/crates/render/src/draw.rs
@@ -1031,6 +1031,11 @@ fn masked_area(ctx: &Ctx, pix: &Pixmap, mask_id: NodeId, content: &[NodeId], xf:
 /// Mask `m` drawn as if it weren't a mask into a `w` × `h` pixmap at `xf` (a vector mask: its
 /// outline, fully opaque).
 fn mask_pixels(ctx: &Ctx, m: &Node, (w, h): (u32, u32), xf: Affine, depth: usize) -> Option<Pixmap> {
+    // A mask's content is drawn here, not through `draw_layer`, so a chain of masks inside
+    // masks needs the nesting limit checked here too, or it runs down the stack.
+    if depth > crate::MAX_EXPORT_DEPTH {
+        return None;
+    }
     let mut mask_px = Pixmap::new(w, h)?;
     let mut m2 = m.clone();
     m2.is_mask = false;
diff --git a/crates/render/src/gif_tests.rs b/crates/render/src/gif_tests.rs
index 8ac509c06..948d28821 100644
--- a/crates/render/src/gif_tests.rs
+++ b/crates/render/src/gif_tests.rs
@@ -78,6 +78,20 @@ fn decoding_is_capped() {
     assert!(images::decode_frames(&huge).is_none());
 }
 
+#[test]
+fn a_large_partial_frame_plays_when_two_whole_frames_fit() {
+    // Canvas 4000 x 3000 (48 MB a frame, two fit the cap) with a 3500 x 2800 second frame: the
+    // decoder's canvas, composited output and partial frame together need more than the cap.
+    let mut out = Vec::new();
+    {
+        let mut enc = GifEncoder::new(&mut out);
+        enc.set_repeat(Repeat::Infinite).unwrap();
+        let frame = |w, h, c| Frame::from_parts(RgbaImage::from_pixel(w, h, image::Rgba(c)), 0, 0, Delay::from_numer_denom_ms(100, 1));
+        enc.encode_frames([frame(4000, 3000, RED), frame(3500, 2800, GREEN)]).unwrap();
+    }
+    assert_eq!(images::decode_frames(&out).map(|f| f.len()), Some(2));
+}
+
 #[test]
 fn the_first_frame_draws_unless_time_moves_on() {
     let mut d = Document::new("t");
@@ -98,3 +112,16 @@ fn the_first_frame_draws_unless_time_moves_on() {
     d.get_mut(id).unwrap().visible = false;
     assert!(images::animation_clock(&d, page, 0.15).is_none(), "hidden layers don't keep the presenter awake");
 }
+
+#[test]
+fn a_frame_descriptor_bigger_than_the_canvas_is_refused_before_it_is_allocated() {
+    // A 4 × 4 canvas whose first frame descriptor claims 16,383 × 16,383 (a gigabyte of RGBA):
+    // the decoder's limits refuse the frame buffer instead of allocating it.
+    let mut bytes = gif(&[(RED, 100), (GREEN, 100)], 4, 4);
+    let at = bytes.windows(9).position(|w| w == [0x2c, 0, 0, 0, 0, 4, 0, 4, 0]).expect("an image descriptor for a 4 × 4 frame");
+    let (w, h) = ((16_383u16).to_le_bytes(), (16_383u16).to_le_bytes());
+    bytes[at + 5..at + 9].copy_from_slice(&[w[0], w[1], h[0], h[1]]);
+    let start = std::time::Instant::now();
+    assert!(images::decode_frames(&bytes).is_none());
+    assert!(start.elapsed() < std::time::Duration::from_secs(5), "{:?}", start.elapsed());
+}
diff --git a/crates/render/src/images.rs b/crates/render/src/images.rs
index a4d8ead09..5eea7033d 100644
--- a/crates/render/src/images.rs
+++ b/crates/render/src/images.rs
@@ -293,12 +293,21 @@ pub fn decode_frames(bytes: &[u8]) -> Option<Vec<(Pixmap, f64)>> {
     if image::guess_format(bytes).ok()? != image::ImageFormat::Gif {
         return None;
     }
-    let dec = image::codecs::gif::GifDecoder::new(std::io::Cursor::new(bytes)).ok()?;
+    let mut dec = image::codecs::gif::GifDecoder::new(std::io::Cursor::new(bytes)).ok()?;
     let (w, h) = dec.dimensions();
     let frame_bytes = u64::from(w) * u64::from(h) * 4;
     if frame_bytes == 0 || w > MAX_SIDE || h > MAX_SIDE {
         return None;
     }
+    // A frame's own descriptor can ask for a far larger buffer than the canvas: the decoder
+    // reserves each frame and canvas buffer against these limits before allocating it.
+    let mut limits = image::Limits::default();
+    limits.max_image_width = Some(MAX_SIDE);
+    limits.max_image_height = Some(MAX_SIDE);
+    // The decoder charges its canvas, its composited output and the partial frame against this
+    // together, besides the frames kept (capped by `most` below): one frame of working room.
+    limits.max_alloc = Some(MAX_ANIMATION_BYTES.saturating_add(frame_bytes));
+    dec.set_limits(limits).ok()?;
     let most = (MAX_ANIMATION_BYTES / frame_bytes).min(MAX_FRAMES as u64) as usize;
     let mut out = Vec::new();
     for f in dec.into_frames().take(most) {
diff --git a/crates/render/src/mask_bounds_tests.rs b/crates/render/src/mask_bounds_tests.rs
index 841542e1e..45615eff1 100644
--- a/crates/render/src/mask_bounds_tests.rs
+++ b/crates/render/src/mask_bounds_tests.rs
@@ -139,3 +139,24 @@ fn a_deep_nest_of_isolated_layers_stays_within_the_budget() {
     // The outer levels still draw (the innermost, past the budget, are left out).
     assert_ne!(&pix.data()[..4], &[255, 255, 255, 255]);
 }
+
+#[test]
+fn masks_nested_inside_masks_stop_at_the_nesting_limit() {
+    // A mask's content is drawn straight from `mask_pixels`, not through `draw_layer`, so a mask
+    // group inside a mask group inside… used to recurse past the limit and down the stack.
+    let mut d = Document::new("deep masks");
+    let p = d.first_page().unwrap();
+    let mut parent = p;
+    for _ in 0..2000 {
+        let g = d.create(parent, NodeKind::Group, "Masking group", 0.0, 0.0, 1.0, 1.0).unwrap();
+        let n = d.get_mut(g).unwrap();
+        n.is_mask = true;
+        n.mask_type = MaskType::Alpha;
+        parent = g;
+    }
+    shape(&mut d, parent, NodeKind::Rectangle, (0.0, 0.0, 100.0, 100.0), "2040E0");
+    shape(&mut d, p, NodeKind::Rectangle, (0.0, 0.0, 100.0, 100.0), "E04020");
+    let v = View { origin: (0.0, 0.0), scale: 1.0, width: 50, height: 50 };
+    let pix = render(&d, p, &v, false);
+    assert_eq!(pix.width(), 50);
+}

From 32b658fe717952197fef6da4d3a85f099fb63f79 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:57:03 -0500
Subject: [PATCH 14/41] perf(engine): list a few step names in a
 missing-reference error (#1941)

Every missing $ref rendered the batch's whole name table into its error,
and with onError: continue each such error was kept, so a compact batch
cost its name count per failed step. The hint names twelve steps and
counts the rest.
---
 crates/engine/src/automation/batch.rs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/crates/engine/src/automation/batch.rs b/crates/engine/src/automation/batch.rs
index 103177455..e0f22d870 100644
--- a/crates/engine/src/automation/batch.rs
+++ b/crates/engine/src/automation/batch.rs
@@ -156,14 +156,20 @@ impl BatchScope {
         lookup(result, path).cloned().map_err(|why| fail(format!("{who}'s result has no `{path}`{why}")))
     }
 
+    /// Most step names a missing-reference error lists.
+    const NAME_HINTS: usize = 12;
+
     fn known_names(&self) -> String {
         let mut names: Vec<_> = self.names.iter().collect();
         names.sort_by_key(|(_, i)| **i);
         if names.is_empty() {
             return "no step has an `as` name".into();
         }
-        let list: Vec<_> = names.iter().map(|(name, i)| format!("\"{name}\" is step {i}")).collect();
-        list.join(", ")
+        // A few of them: the list is built for every missing reference and, with `onError:
+        // continue`, kept for each, so a long table would cost its length per failed step.
+        let list: Vec<_> = names.iter().take(Self::NAME_HINTS).map(|(name, i)| format!("\"{name}\" is step {i}")).collect();
+        let more = names.len().saturating_sub(Self::NAME_HINTS);
+        if more > 0 { format!("{}, {more} more", list.join(", ")) } else { list.join(", ") }
     }
 }
 

From 16a79570f160679368b74db38030499a1eda053b Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:57:28 -0500
Subject: [PATCH 15/41] perf(svg): hash an embedded image's bytes once per
 import (#1945)

Every shape painted with a raster pattern hashed the pattern's whole
encoded image again to find its document key, so one embedded image reused
by many shapes multiplied the hashing work without adding any image data.
The key is kept per buffer for the import.
---
 crates/svg/src/import.rs       | 27 +++++++++++++++++++++++++--
 crates/svg/src/import/paint.rs |  2 +-
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/crates/svg/src/import.rs b/crates/svg/src/import.rs
index e3d9d8523..9466b3c60 100644
--- a/crates/svg/src/import.rs
+++ b/crates/svg/src/import.rs
@@ -103,11 +103,34 @@ pub(crate) struct Ctx<'a> {
     pattern_depth: usize,
     /// Tiles drawn so far, by pattern and scale (see [`paint`]'s `render_tile`).
     tiles: HashMap<(*const usvg::Pattern, u64), Option<paint::Tile>>,
+    /// The document image key of each embedded image's bytes already added, so an image a
+    /// pattern paints on many shapes is hashed once, not once per shape.
+    image_keys: HashMap<*const Vec<u8>, String>,
 }
 
 impl<'a> Ctx<'a> {
     pub(crate) fn new(doc: &'a mut Document) -> Self {
-        Ctx { doc, count: 0, anonymous: HashSet::new(), notes: BTreeSet::new(), fonts: None, pattern_depth: 0, tiles: HashMap::new() }
+        Ctx {
+            doc,
+            count: 0,
+            anonymous: HashSet::new(),
+            notes: BTreeSet::new(),
+            fonts: None,
+            pattern_depth: 0,
+            tiles: HashMap::new(),
+            image_keys: HashMap::new(),
+        }
+    }
+
+    /// [`add_image`] for `bytes`, once per distinct buffer.
+    pub(crate) fn image(&mut self, bytes: std::sync::Arc<Vec<u8>>, w: f64, h: f64) -> String {
+        if let Some(k) = self.image_keys.get(&std::sync::Arc::as_ptr(&bytes)) {
+            return k.clone();
+        }
+        let ptr = std::sync::Arc::as_ptr(&bytes);
+        let key = add_image(self.doc, bytes, w, h);
+        self.image_keys.insert(ptr, key.clone());
+        key
     }
 
     pub(crate) fn full(&self) -> bool {
@@ -605,7 +628,7 @@ fn image(cx: &mut Ctx, img: &usvg::Image, id: &str, parent: NodeId, base: Affine
     let size = img.size();
     let (iw, ih) = (f64::from(size.width()), f64::from(size.height()));
     let (transform, w, h) = place(world, Point::ZERO, iw, ih).unwrap_or((world, iw, ih));
-    let hash = add_image(cx.doc, bytes, iw, ih);
+    let hash = cx.image(bytes, iw, ih);
     let mut n = Node::new(cx.doc.alloc_id(), NodeKind::Rectangle, layer_name(id, "Image"), w, h);
     n.transform = transform;
     let mut fill = Paint::image(hash, ImageScaleMode::Fill);
diff --git a/crates/svg/src/import/paint.rs b/crates/svg/src/import/paint.rs
index 6e6300cc3..2eed8aa44 100644
--- a/crates/svg/src/import/paint.rs
+++ b/crates/svg/src/import/paint.rs
@@ -133,7 +133,7 @@ fn pattern(cx: &mut Ctx, pat: &usvg::Pattern, t: Target) -> Option<Paint> {
         let s = img.size();
         let (iw, ih) = (f64::from(s.width()), f64::from(s.height()));
         let b = figcraft_geom::transform_rect_bbox(m, Rect::new(0.0, 0.0, iw, ih));
-        (tile_rect.contains(b.origin()) && tile_rect.contains(Point::new(b.x1, b.y1))).then(|| (add_image(cx.doc, bytes, iw, ih), iw, ih, m))
+        (tile_rect.contains(b.origin()) && tile_rect.contains(Point::new(b.x1, b.y1))).then(|| (cx.image(bytes, iw, ih), iw, ih, m))
     });
     let (hash, iw, ih, content) = match lone {
         Some(l) => l,

From 1be869793f7721acd914e9d118b599629b4a4bef Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:58:02 -0500
Subject: [PATCH 16/41] fix(doc): bound the string bytes an expression holds
 and stop concatenating at the cap (#1950)

* fix(doc): bound the string bytes an expression holds and stop concatenating at the cap

* address review: count only appended characters; keep validating operands past the cap
---
 crates/doc/src/proto_expr.rs       | 28 +++++++++++++++++++++++++---
 crates/doc/src/proto_expr_tests.rs | 16 ++++++++++++++++
 2 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/crates/doc/src/proto_expr.rs b/crates/doc/src/proto_expr.rs
index 1638c12ec..3b25c936d 100644
--- a/crates/doc/src/proto_expr.rs
+++ b/crates/doc/src/proto_expr.rs
@@ -12,6 +12,8 @@ use crate::{CollectionId, ModeId, VariableValue, Variables};
 pub const MAX_EXPR_DEPTH: usize = 32;
 /// Longest string an expression builds (characters).
 const MAX_STRING: usize = 10_000;
+/// The most string bytes one operation's operands may hold together (generous: results cap at `MAX_STRING`).
+const MAX_OPERAND_BYTES: usize = 1 << 20;
 
 /// An expression over variables.
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
@@ -115,7 +117,19 @@ impl Expr {
             }
             Expr::Op { op, args } => (*op, args),
         };
-        let vals: Vec<VariableValue> = args.iter().map(|a| a.eval_at(vars, modes, depth + 1)).collect::<Option<_>>()?;
+        // Retained operands are bounded by bytes, so repeated references to one long string can't multiply it.
+        let mut text_bytes = 0usize;
+        let mut vals = Vec::with_capacity(args.len());
+        for a in args {
+            let v = a.eval_at(vars, modes, depth + 1)?;
+            if let VariableValue::String(s) = &v {
+                text_bytes = text_bytes.saturating_add(s.len());
+                if text_bytes > MAX_OPERAND_BYTES {
+                    return None;
+                }
+            }
+            vals.push(v);
+        }
         apply(op, &vals)
     }
 
@@ -259,10 +273,18 @@ fn apply(op: ExprOp, vals: &[VariableValue]) -> Option<VariableValue> {
     match op {
         Add if vals.iter().any(|v| matches!(v, VariableValue::String(_))) => {
             let mut s = String::new();
+            let mut chars = 0;
             for v in vals {
-                s.push_str(&as_text(v)?);
+                // Every operand is checked (a colour makes the whole expression None); only the
+                // characters it adds are counted, and appending stops at the cap.
+                let t = as_text(v)?;
+                if chars < MAX_STRING {
+                    let before = s.len();
+                    s.extend(t.chars().take(MAX_STRING - chars));
+                    chars += s[before..].chars().count();
+                }
             }
-            Some(VariableValue::String(s.chars().take(MAX_STRING).collect()))
+            Some(VariableValue::String(s))
         }
         Add => fold(|a, b| Some(a + b)),
         Subtract => fold(|a, b| Some(a - b)),
diff --git a/crates/doc/src/proto_expr_tests.rs b/crates/doc/src/proto_expr_tests.rs
index 436e97c19..9250a5d9d 100644
--- a/crates/doc/src/proto_expr_tests.rs
+++ b/crates/doc/src/proto_expr_tests.rs
@@ -124,6 +124,13 @@ fn deep_and_hostile_expressions_are_bounded() {
     let joined = Expr::op(ExprOp::Add, vec![s(&long), s(&long)]);
     let Some(VariableValue::String(t)) = eval(&joined) else { panic!() };
     assert_eq!(t.chars().count(), 10_000, "capped");
+    // Past the cap a colour operand still fails the expression, and empty operands add nothing.
+    let color = Expr::Value(VariableValue::Color(Color::BLACK));
+    let mut ops = vec![s(&"x".repeat(10_000))];
+    ops.extend((0..50).map(|_| s("")));
+    assert!(matches!(eval(&Expr::op(ExprOp::Add, ops.clone())), Some(VariableValue::String(t)) if t.chars().count() == 10_000));
+    ops.push(color);
+    assert_eq!(eval(&Expr::op(ExprOp::Add, ops)), None, "a colour past the cap is still a type error");
 }
 
 fn nav(id: u64) -> Action {
@@ -199,3 +206,12 @@ fn serde_round_trip_and_old_files() {
     let old: Action = serde_json::from_str(r#"{"type":"setVariable","variable":"n","value":2}"#).unwrap_or(Action::Back);
     assert_eq!(old, Action::SetVariable { variable: "n".into(), value: serde_json::json!(2), expr: None });
 }
+
+#[test]
+fn operands_holding_too_many_string_bytes_are_refused() {
+    let long = "x".repeat(300_000);
+    let few = Expr::op(ExprOp::Add, vec![s(&long), s(&long)]);
+    assert!(eval(&few).is_some());
+    let many = Expr::op(ExprOp::Add, (0..8).map(|_| s(&long)).collect());
+    assert_eq!(eval(&many), None);
+}

From bcc611b3a9c8c4127ccb0cc7cb3c3607eef00c9b Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:58:27 -0500
Subject: [PATCH 17/41] fix(engine): hold a plugin's text.preview to the
 permissions of the command it previews (#1959)

* fix(engine): hold a plugin's text.preview to the permissions of the command it previews

* address review: check PREVIEWABLE before recursing into a preview's inner command
---
 crates/engine/src/extensions/plugins.rs | 10 ++++++++++
 crates/engine/src/plugins_tests.rs      | 24 ++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/crates/engine/src/extensions/plugins.rs b/crates/engine/src/extensions/plugins.rs
index 2b1094306..208efedd2 100644
--- a/crates/engine/src/extensions/plugins.rs
+++ b/crates/engine/src/extensions/plugins.rs
@@ -149,6 +149,16 @@ fn refusal(m: &Manifest, command: &str, params: &Value) -> Option<String> {
     if DENIED.iter().any(|p| command.starts_with(p)) && !ALLOWED.contains(&command) {
         return Some(format!("`{command}` isn't available to plugins"));
     }
+    // A preview runs its inner command, which the plugin's permissions and the denied list must cover too.
+    // An inner command that can't be previewed (a nested preview) is refused by the preview itself,
+    // before it runs: descending into its parameters first would only rescan them.
+    if command == "text.preview"
+        && let Some(inner) = get(params, "command").and_then(Value::as_str)
+        && crate::textpreview::PREVIEWABLE.contains(&inner)
+        && let Some(why) = refusal(m, inner, get(params, "params").unwrap_or(&Value::Null))
+    {
+        return Some(why);
+    }
     // A widget's own data is FigCraft's to write, so no plugin can forge or retarget a widget.
     if writes_widget_data(params, 0) {
         return Some(format!("plugins can't write `{}…` layer data", crate::widgets::DATA_PREFIX));
diff --git a/crates/engine/src/plugins_tests.rs b/crates/engine/src/plugins_tests.rs
index dd60f8344..84f233fc9 100644
--- a/crates/engine/src/plugins_tests.rs
+++ b/crates/engine/src/plugins_tests.rs
@@ -153,6 +153,30 @@ fn read_only_plugins_and_allowlists_are_enforced() {
     assert_eq!(node(&s, a).name, "Rectangle");
 }
 
+#[test]
+fn a_preview_is_held_to_the_permissions_of_the_command_it_shows() {
+    let mut s = Session::new();
+    let a = rect(&mut s, 0.0);
+    // Only text.preview is allowed: the node.set it would run is not.
+    install(
+        &mut s,
+        manifest("org.test.previewer", "write", &["text.preview"]),
+        &script(&[("text.preview", json!({"command": "node.set", "params": {"id": a, "props": {"name": "x"}}}))], OnRefusal::Fail, ""),
+    );
+    let e = run_err(&mut s, "org.test.previewer");
+    assert!(e.contains("`node.set` isn't in the commands"), "{e}");
+    assert_eq!(node(&s, a).name, "Rectangle");
+}
+
+#[test]
+fn a_nested_preview_is_refused_by_the_preview_itself() {
+    let mut s = Session::new();
+    let nested = json!({"command": "text.preview", "params": {"command": "node.set", "params": {"props": {"name": "x"}}}});
+    install(&mut s, manifest("org.test.nested", "write", &["text.preview"]), &script(&[("text.preview", nested)], OnRefusal::Fail, ""));
+    let e = run_err(&mut s, "org.test.nested");
+    assert!(e.contains("can't be previewed"), "{e}");
+}
+
 #[test]
 fn files_dialogs_history_and_plugins_are_off_limits() {
     let mut s = Session::new();

From c1dfa9eceef390cf0306bb00c9673fcb036d5e2c Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:59:02 -0500
Subject: [PATCH 18/41] fix(ui): write a plugin's offered file through the
 confined file helper (#1960)

---
 crates/ui-egui/src/dialogs/plugins_ui.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/ui-egui/src/dialogs/plugins_ui.rs b/crates/ui-egui/src/dialogs/plugins_ui.rs
index 350be2d6e..d335b277a 100644
--- a/crates/ui-egui/src/dialogs/plugins_ui.rs
+++ b/crates/ui-egui/src/dialogs/plugins_ui.rs
@@ -138,7 +138,7 @@ pub(crate) fn save_file(app: &mut FigApp, data: &Value) {
     let shown = name.clone();
     app.pick_save(tr("Save file"), &name, &exts, move |app, path| {
         let file = path.file_name().map(|f| f.to_string_lossy().to_string()).unwrap_or(shown);
-        match std::fs::write(&path, &bytes) {
+        match figcraft_engine::file_access::write(&path, &bytes) {
             Ok(()) => app.toast(trf("Saved {name}", &[("name", &file)])),
             Err(_) => app.toast(tr("Couldn't save the file")),
         }

From 975544b895852f61dec1c045c6e96e4376bf4340 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:59:27 -0500
Subject: [PATCH 19/41] perf(collab): memoise layer depths in diff and skip the
 sibling scan for a new child (#1961)

* perf(collab): memoise layer depths in diff and skip the sibling scan for a new child

* address review: bound the depth walk by the document's node count
---
 crates/collab/src/diff.rs       | 45 ++++++++++++++++++++++++++++-----
 crates/collab/src/diff_tests.rs | 11 ++++++++
 crates/collab/src/replica.rs    |  4 ++-
 3 files changed, 52 insertions(+), 8 deletions(-)

diff --git a/crates/collab/src/diff.rs b/crates/collab/src/diff.rs
index 016dc5dd0..91e156155 100644
--- a/crates/collab/src/diff.rs
+++ b/crates/collab/src/diff.rs
@@ -95,7 +95,8 @@ pub fn diff(from: &Replica, to: &Document) -> Result<Diff, Error> {
     let mut changes = fields;
     let new: BTreeSet<NodeId> = added.iter().copied().collect();
     // Creations, parents before children.
-    added.sort_by_cached_key(|id| (depth(to, *id), *id));
+    let mut memo = BTreeMap::new();
+    added.sort_by_cached_key(|id| (depth(to, *id, &mut memo), *id));
     for id in &added {
         if let Some(n) = to.node(*id) {
             changes.push(create_change(n, replica.key(*id))?);
@@ -121,18 +122,30 @@ pub fn diff(from: &Replica, to: &Document) -> Result<Diff, Error> {
     Ok(Diff { changes, replica })
 }
 
-/// Depth of `id` in `doc` (pages are 0).
-fn depth(doc: &Document, id: NodeId) -> usize {
-    let mut d = 0;
+/// Depth of `id` in `doc` (pages are 0). `memo` holds the depths found so far, so a deep chain of
+/// new layers is walked once rather than once per layer.
+fn depth(doc: &Document, id: NodeId, memo: &mut BTreeMap<NodeId, usize>) -> usize {
+    let mut chain = vec![id];
+    let mut base = 0;
     let mut cur = doc.node(id).and_then(|n| n.parent);
     while let Some(p) = cur {
-        d += 1;
-        if d > 100_000 {
+        if let Some(d) = memo.get(&p) {
+            base = *d + 1;
             break;
         }
+        // An acyclic chain is no longer than the document: this only stops a cycle.
+        if chain.len() > doc.node_count() {
+            break;
+        }
+        chain.push(p);
         cur = doc.node(p).and_then(|n| n.parent);
     }
-    d
+    // `chain` runs from `id` up; the last entry's depth is `base` when it ends at a root or a memo hit.
+    let top = chain.len();
+    for (i, c) in chain.iter().enumerate() {
+        memo.insert(*c, base + (top - 1 - i));
+    }
+    memo.get(&id).copied().unwrap_or(0)
 }
 
 /// New keys for the children `kids` (in their new order) whose `old` key no longer fits: the
@@ -196,3 +209,21 @@ fn increasing_run(keys: &[Option<&str>]) -> Vec<bool> {
     }
     kept
 }
+
+#[cfg(test)]
+mod depth_tests {
+    use super::*;
+    use figcraft_doc::NodeKind;
+
+    #[test]
+    fn a_chain_longer_than_a_fixed_bound_is_walked_whole() {
+        let mut doc = Document::new("File");
+        let mut parent = doc.first_page().unwrap();
+        let mut last = parent;
+        for i in 0..100_050 {
+            last = doc.create(parent, NodeKind::Frame, &format!("F{i}"), 0.0, 0.0, 1.0, 1.0).unwrap();
+            parent = last;
+        }
+        assert_eq!(depth(&doc, last, &mut BTreeMap::new()), 100_050);
+    }
+}
diff --git a/crates/collab/src/diff_tests.rs b/crates/collab/src/diff_tests.rs
index 8c6a1211c..bb81d0b1b 100644
--- a/crates/collab/src/diff_tests.rs
+++ b/crates/collab/src/diff_tests.rs
@@ -310,3 +310,14 @@ fn many_sibling_placements_keep_the_order_of_counting_them() {
         assert_eq!(r.document().node(p).unwrap().children, kids[&p], "children of {p}");
     }
 }
+
+#[test]
+fn a_chain_of_new_nested_layers_is_created_parents_first() {
+    let (a, _, frame, _) = setup();
+    let mut b = a.document().clone();
+    let mut parent = frame;
+    for i in 0..400 {
+        parent = b.create(parent, NodeKind::Frame, &format!("F{i}"), 0.0, 0.0, 10.0, 10.0).unwrap();
+    }
+    assert_eq!(round_trip(&a, &b).iter().filter(|c| matches!(c, Change::Create { .. })).count(), 400);
+}
diff --git a/crates/collab/src/replica.rs b/crates/collab/src/replica.rs
index d14676a01..547f0f59b 100644
--- a/crates/collab/src/replica.rs
+++ b/crates/collab/src/replica.rs
@@ -236,7 +236,9 @@ impl Replica {
                         self.doc.insert_page(node).map_err(doc_err)?;
                     }
                     (false, Some(p)) => {
-                        let at = self.slot(&self.doc.get(*p).map_err(doc_err)?.children, *id, position);
+                        // A new id sits in no sibling list yet: no scan for it, just the binary search.
+                        let siblings = &self.doc.get(*p).map_err(doc_err)?.children;
+                        let at = siblings.partition_point(|c| (self.key(*c), *c) < (position.as_str(), *id));
                         self.doc.insert(node, *p, Some(at)).map_err(doc_err)?;
                     }
                     _ => return Err(Error::Invalid("pages, and only pages, have no parent".into())),

From 3c7bae6a04828b40f6a62c82fda4feca1757a33b Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 22:59:53 -0500
Subject: [PATCH 20/41] perf(vectordrawable): resume each repeated name's
 suffix search where it stopped (#1964)

* perf(vectordrawable): resume each repeated name's suffix search where it stopped

* address review: continue from a longer stem when the name suffix counter is exhausted
---
 crates/vectordrawable/src/walk.rs | 46 ++++++++++++++++++++++++++-----
 1 file changed, 39 insertions(+), 7 deletions(-)

diff --git a/crates/vectordrawable/src/walk.rs b/crates/vectordrawable/src/walk.rs
index f085d340c..090cf4508 100644
--- a/crates/vectordrawable/src/walk.rs
+++ b/crates/vectordrawable/src/walk.rs
@@ -24,6 +24,8 @@ pub(crate) struct Walker<'a> {
     opts: &'a VdOptions,
     warn: Warnings,
     names: std::collections::BTreeSet<String>,
+    /// The next suffix to try for each base name (names only get taken, so none before it is free).
+    next_suffix: std::collections::BTreeMap<String, usize>,
 }
 
 /// Every coordinate of `p` finite and within [`MAX_COORD`].
@@ -54,7 +56,7 @@ fn normal(b: BlendMode) -> bool {
 
 impl<'a> Walker<'a> {
     pub fn new(doc: &'a Document, opts: &'a VdOptions) -> Self {
-        Self { doc, opts, warn: Warnings::default(), names: Default::default() }
+        Self { doc, opts, warn: Warnings::default(), names: Default::default(), next_suffix: Default::default() }
     }
 
     /// Reports that the export drew nothing at all (named after `layer`).
@@ -78,12 +80,25 @@ impl<'a> Walker<'a> {
     fn unique(&mut self, name: &str) -> String {
         let base: String = name.chars().take(200).collect();
         let base = if base.trim().is_empty() { "layer".to_string() } else { base };
-        // Bounded: a set of n names leaves one of the first n + 1 candidates free.
-        let tries = self.names.len().saturating_add(1);
-        let name = (1..=tries)
-            .map(|k| if k == 1 { base.clone() } else { format!("{base}_{k}") })
-            .find(|n| !self.names.contains(n))
-            .unwrap_or_else(|| format!("{base}_{}", tries.saturating_add(1)));
+        let mut k = self.next_suffix.get(&base).copied().unwrap_or(1);
+        let mut stem = base.clone();
+        // Bounded: a set of n names leaves one of the first n + 1 candidates free. A counter
+        // that has run out (`usize::MAX`) continues from a longer stem instead of repeating.
+        let name = loop {
+            let candidate = if k == 1 { stem.clone() } else { format!("{stem}_{k}") };
+            if !self.names.contains(&candidate) {
+                k = k.saturating_add(1);
+                break candidate;
+            }
+            if k == usize::MAX {
+                stem = candidate;
+                k = 2;
+            } else {
+                k += 1;
+            }
+        };
+        let longer = stem.len() > base.len();
+        self.next_suffix.insert(base, if longer { usize::MAX } else { k });
         self.names.insert(name.clone());
         name
     }
@@ -404,3 +419,20 @@ impl<'a> Walker<'a> {
         }
     }
 }
+
+#[cfg(test)]
+mod unique_tests {
+    use super::*;
+
+    #[test]
+    fn an_exhausted_suffix_counter_still_finds_a_free_name() {
+        let (doc, opts) = (Document::new("File"), VdOptions::default());
+        let mut w = Walker::new(&doc, &opts);
+        w.next_suffix.insert("a".into(), usize::MAX);
+        w.names.insert(format!("a_{}", usize::MAX));
+        let first = w.unique("a");
+        let second = w.unique("a");
+        assert_ne!(first, second);
+        assert!(w.names.len() == 3 && w.names.contains(&first) && w.names.contains(&second));
+    }
+}

From 898a08b0ce1ec019a392c5336dfe00847a76d085 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 23:00:28 -0500
Subject: [PATCH 21/41] perf(pdf): collect each text style's outlines and
 decorations in one pass (#1965)

* perf(pdf): collect each text style's outlines and decorations in one pass

* address review: build each style's paths inside the style loop
---
 crates/pdf/src/text.rs | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/crates/pdf/src/text.rs b/crates/pdf/src/text.rs
index abbb65b34..feb1f1a07 100644
--- a/crates/pdf/src/text.rs
+++ b/crates/pdf/src/text.rs
@@ -1,7 +1,7 @@
 //! Text: real, selectable text in embedded (subset) fonts, positioned glyph by glyph from the
 //! `figcraft_text` layout the renderer uses, with outline fallbacks.
 
-use std::collections::BTreeSet;
+use std::collections::{BTreeMap, BTreeSet};
 use std::ops::Range;
 use std::sync::Arc;
 
@@ -56,14 +56,24 @@ pub(crate) fn draw_text(ex: &mut Exporter, s: &mut Surface, n: &Node, xf: Affine
     let styles: BTreeSet<usize> = layout.glyphs.iter().map(|g| g.style).chain(layout.decorations.iter().map(|d| d.style)).collect();
     // Every run's fills, then the inner shadows over them, then the strokes on top.
     let mut stroked = Vec::new();
+    // Glyphs and decorations are grouped by style in one pass; each style's paths are built (and
+    // dropped) inside its own iteration, so only one style's paths are held at a time.
+    let mut decoration_of: BTreeMap<usize, Vec<usize>> = BTreeMap::new();
+    for (i, d) in layout.decorations.iter().enumerate() {
+        decoration_of.entry(d.style).or_default().push(i);
+    }
+    let mut glyph_of: BTreeMap<usize, Vec<usize>> = BTreeMap::new();
+    for (i, g) in layout.glyphs.iter().enumerate() {
+        glyph_of.entry(g.style).or_default().push(i);
+    }
     for k in styles {
         let fills = layout.styles.get(k).and_then(|st| st.fills.as_ref()).unwrap_or(&n.fills);
         let mut decorations = BezPath::new();
-        for d in layout.decorations.iter().filter(|d| d.style == k) {
+        for d in decoration_of.remove(&k).unwrap_or_default().into_iter().filter_map(|i| layout.decorations.get(i)) {
             decorations.extend(d.path());
         }
         let mut outlines = BezPath::new();
-        for g in layout.glyphs.iter().filter(|g| g.style == k) {
+        for g in glyph_of.remove(&k).unwrap_or_default().into_iter().filter_map(|i| layout.glyphs.get(i)) {
             outlines.extend(g.path());
         }
         outlines.extend(decorations.iter());

From 5f022aa8a9f16967fc76c10b541fcb061020061d Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 23:00:54 -0500
Subject: [PATCH 22/41] perf(engine): index variables once when following a
 library's alias chains (#1968)

* perf(engine): index variables once when following a library's alias chains

* address review: return before indexing variables for an empty seed set
---
 crates/engine/src/assets/library.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/crates/engine/src/assets/library.rs b/crates/engine/src/assets/library.rs
index 7e7e9b80d..01e8d3244 100644
--- a/crates/engine/src/assets/library.rs
+++ b/crates/engine/src/assets/library.rs
@@ -277,8 +277,16 @@ pub fn default_selection(doc: &Document, prev: Option<&LibraryManifest>) -> Sele
 fn alias_closure(vars: &Variables, seeds: impl IntoIterator<Item = VariableId>) -> BTreeSet<VariableId> {
     let mut out = BTreeSet::new();
     let mut stack: Vec<VariableId> = seeds.into_iter().collect();
+    if stack.is_empty() {
+        return out;
+    }
+    // Indexed once (the first of equal ids, as `get_by_id` finds it): a scan per step is quadratic on a long alias chain.
+    let mut by_id = std::collections::HashMap::new();
+    for v in &vars.variables {
+        by_id.entry(v.id.as_str()).or_insert(v);
+    }
     while let Some(cur) = stack.pop() {
-        let Some(v) = vars.get_by_id(&cur) else { continue };
+        let Some(v) = by_id.get(cur.as_str()).copied() else { continue };
         if out.len() >= MAX_ASSETS || !out.insert(v.id.clone()) {
             continue;
         }

From 519ffd4987ad30f702b824ab7a3ca6842c062254 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 23:01:19 -0500
Subject: [PATCH 23/41] fix(format): import a Sketch page once however often
 the file lists it (#1973)

---
 crates/format/src/sketch.rs       | 5 +++++
 crates/format/src/sketch/tests.rs | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/crates/format/src/sketch.rs b/crates/format/src/sketch.rs
index 8186ce26d..01b68e6c9 100644
--- a/crates/format/src/sketch.rs
+++ b/crates/format/src/sketch.rs
@@ -226,11 +226,16 @@ impl<'b> Archive<'b> {
         };
         let refs = document.get("pages").and_then(Value::as_array).map(Vec::as_slice).unwrap_or_default();
         let mut pages = Vec::new();
+        let mut seen = std::collections::HashSet::new();
         for r in refs.iter().take(MAX_PAGES) {
             let Some(id) = r.get("_ref").and_then(Value::as_str).and_then(|s| s.strip_prefix("pages/")).filter(|id| valid_id(id)) else {
                 warnings.push("pages the document lists without a valid reference were skipped".into());
                 continue;
             };
+            // A page listed twice is read once: a repeated reference must not repeat the unpacking.
+            if !seen.insert(id) {
+                continue;
+            }
             match json_member(&mut z, &format!("pages/{id}.json"), max_member, &mut total) {
                 Ok(page) if page.is_object() => pages.push((id.to_string(), page)),
                 Ok(_) => warnings.push("pages that aren't JSON objects were skipped".into()),
diff --git a/crates/format/src/sketch/tests.rs b/crates/format/src/sketch/tests.rs
index b4368de12..d8ace8be9 100644
--- a/crates/format/src/sketch/tests.rs
+++ b/crates/format/src/sketch/tests.rs
@@ -35,6 +35,13 @@ fn pages_become_pages_in_document_order() {
     assert_eq!(page_names(&doc), ["Beta", "Alpha"]);
 }
 
+#[test]
+fn a_page_listed_twice_is_imported_once() {
+    let z = sketch_zip("50.2", 103, document(&["A", "A", "A"]), &[page("A", "Alpha", vec![])], &[]);
+    let (doc, _) = import(&z, "f").unwrap();
+    assert_eq!(page_names(&doc), ["Alpha"]);
+}
+
 #[test]
 fn older_than_48_is_refused() {
     let z = sketch_zip("47.1", 95, document(&["P"]), &[page("P", "P", vec![])], &[]);

From 972ccc6a1741a1ab97f70f40ba2ebd7180c99d3b Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 23:01:44 -0500
Subject: [PATCH 24/41] fix(engine): count each id Shape Builder is given once
 (#1974)

---
 crates/engine/src/canvas/shapebuilder.rs | 4 +++-
 crates/engine/src/shapebuilder_tests.rs  | 9 +++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/crates/engine/src/canvas/shapebuilder.rs b/crates/engine/src/canvas/shapebuilder.rs
index b68f1e71d..fb4c3d699 100644
--- a/crates/engine/src/canvas/shapebuilder.rs
+++ b/crates/engine/src/canvas/shapebuilder.rs
@@ -109,7 +109,9 @@ pub fn eligible(doc: &Document, ids: &[NodeId]) -> Vec<NodeId> {
             out.push(id);
         }
     }
-    let ids: Vec<NodeId> = ids.iter().copied().filter(|i| doc.contains(*i)).collect();
+    // Each id counts once: a repeated group must not be walked once per repeat.
+    let mut seen = std::collections::BTreeSet::new();
+    let ids: Vec<NodeId> = ids.iter().copied().filter(|i| doc.contains(*i) && seen.insert(*i)).collect();
     let mut out = Vec::new();
     for id in roots(doc, &ids) {
         walk(doc, id, 0, &mut out);
diff --git a/crates/engine/src/shapebuilder_tests.rs b/crates/engine/src/shapebuilder_tests.rs
index 3b0cc7efb..a52bf1767 100644
--- a/crates/engine/src/shapebuilder_tests.rs
+++ b/crates/engine/src/shapebuilder_tests.rs
@@ -217,6 +217,15 @@ fn remove_mode_and_escape() {
     assert!(s.execute("shapeBuilder.mode", &json!({"mode": "sideways"})).is_err());
 }
 
+#[test]
+fn a_group_named_many_times_is_walked_once() {
+    let mut s = Session::new();
+    let (a, b) = squares(&mut s);
+    let g = id(&ex(&mut s, "object.group", json!({"ids": [a, b]})));
+    let r = ex(&mut s, "shapeBuilder.regions", json!({"ids": vec![g; 500]}));
+    assert_eq!(r["sources"], json!([a, b]));
+}
+
 #[test]
 fn groups_rotated_and_ineligible_layers() {
     let mut s = Session::new();

From ee4edc7364668404d6c61f0ff909fef2c49962b4 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 23:48:20 -0500
Subject: [PATCH 25/41] perf(engine): replace linear scans that made
 document-sized inputs quadratic (#1921)

* perf(engine): replace linear scans that made document-sized inputs quadratic

enum_of re-classified the whole string for every character; widget names,
comment mentions and devcompare's common siblings each searched a growing
Vec; data.fill's export names and codegen's class names retried every
suffix from 2 against a list, cubic in the number of copies of one name;
and a batch rename template had no length cap although it is expanded
again for every match.

* address review: report the pattern in its own length error
---
 crates/engine/src/cmd/comment.rs            |  7 +++--
 crates/engine/src/cmd/props.rs              |  4 ++-
 crates/engine/src/content/datafill.rs       | 15 +++++++---
 crates/engine/src/dev/codegen.rs            |  2 +-
 crates/engine/src/dev/codegen/html.rs       | 33 ++++++++++++++++-----
 crates/engine/src/dev/component_codegen.rs  | 14 +++++----
 crates/engine/src/dev/devcompare.rs         |  6 ++--
 crates/engine/src/extensions/widgets.rs     |  3 +-
 crates/engine/src/html_codegen_tests.rs     | 14 +++++++++
 crates/engine/src/panels_behaviour_tests.rs |  5 ++++
 crates/engine/src/selection/rename.rs       |  9 ++++++
 11 files changed, 87 insertions(+), 25 deletions(-)

diff --git a/crates/engine/src/cmd/comment.rs b/crates/engine/src/cmd/comment.rs
index c2eb69b12..388d56d88 100644
--- a/crates/engine/src/cmd/comment.rs
+++ b/crates/engine/src/cmd/comment.rs
@@ -373,10 +373,11 @@ fn listed<'s>(cmd: &str, s: &'s Session, p: &Value, who: &str, people: &[&str])
 
 /// Add the names `text` @mentions to `named` as `{name, known, you}`, each once.
 fn push_mentions(named: &mut Vec<Value>, text: &str, people: &[&str], user: &str) {
+    // `known` and `you` follow from the name, so the name alone tells a repeat.
+    let mut seen: std::collections::BTreeSet<String> = named.iter().filter_map(|v| v.get("name")?.as_str().map(str::to_string)).collect();
     for (name, known) in mentioned(text, people) {
-        let v = json!({"name": name, "known": known, "you": known && name.eq_ignore_ascii_case(user)});
-        if !named.contains(&v) {
-            named.push(v);
+        if seen.insert(name.to_string()) {
+            named.push(json!({"name": name, "known": known, "you": known && name.eq_ignore_ascii_case(user)}));
         }
     }
 }
diff --git a/crates/engine/src/cmd/props.rs b/crates/engine/src/cmd/props.rs
index 36e33dd79..abd380cfc 100644
--- a/crates/engine/src/cmd/props.rs
+++ b/crates/engine/src/cmd/props.rs
@@ -115,6 +115,8 @@ pub(crate) fn enum_of<T: serde::de::DeserializeOwned>(v: &Value) -> Option<T> {
     let norm: String = {
         let mut out = String::new();
         let mut up = false;
+        // Once, not per character: a long value made this quadratic before it was refused.
+        let no_lowercase = s.chars().all(|c| !c.is_lowercase() || !c.is_alphabetic());
         for (i, ch) in s.trim().chars().enumerate() {
             if ch == '_' || ch == '-' || ch == ' ' {
                 up = true;
@@ -125,7 +127,7 @@ pub(crate) fn enum_of<T: serde::de::DeserializeOwned>(v: &Value) -> Option<T> {
             } else if up {
                 out.extend(ch.to_uppercase());
                 up = false;
-            } else if s.chars().all(|c| !c.is_lowercase() || !c.is_alphabetic()) {
+            } else if no_lowercase {
                 out.extend(ch.to_lowercase());
             } else {
                 out.push(ch);
diff --git a/crates/engine/src/content/datafill.rs b/crates/engine/src/content/datafill.rs
index b93e5f591..910741994 100644
--- a/crates/engine/src/content/datafill.rs
+++ b/crates/engine/src/content/datafill.rs
@@ -189,14 +189,21 @@ fn fill_layers(s: &mut Session, copy: NodeId, (key, value): (&str, &Value), miss
 /// Export each copy into `dir` as `<name>.<format>` at `scale`, adding `files` (and `errors`) to
 /// `out`.
 fn export_copies(s: &mut Session, ids: &[(NodeId, String)], dir: &str, (format, scale): (&str, f64), out: &mut Value) {
-    let (mut files, mut errors, mut used) = (Vec::new(), Vec::new(), Vec::<String>::new());
+    let (mut files, mut errors) = (Vec::new(), Vec::new());
+    let mut used = std::collections::BTreeSet::<String>::new();
+    // The next number to try per base, so many copies of one name don't retry from 2 each time.
+    let mut next = std::collections::BTreeMap::<String, u64>::new();
     for (copy, name) in ids {
         // One file per copy: same or same-looking names get " 2", " 3"… (case-insensitively,
         // as macOS and Windows file systems compare names).
         let base = file_name(name);
-        let stem =
-            (1..).map(|k| if k == 1 { base.clone() } else { format!("{base} {k}") }).find(|n| !used.contains(&n.to_lowercase())).unwrap_or(base);
-        used.push(stem.to_lowercase());
+        let from = next.get(&base.to_lowercase()).copied().unwrap_or(1);
+        let (k, stem) = (from..)
+            .map(|k| (k, if k == 1 { base.clone() } else { format!("{base} {k}") }))
+            .find(|(_, n)| !used.contains(&n.to_lowercase()))
+            .unwrap_or((from, base.clone()));
+        next.insert(base.to_lowercase(), k + 1);
+        used.insert(stem.to_lowercase());
         let path = std::path::Path::new(dir).join(format!("{stem}.{format}")).to_string_lossy().to_string();
         match s.execute("file.export", &json!({"ids": [copy.0], "format": format, "scale": scale, "path": path})) {
             Ok(_) => files.push(path),
diff --git a/crates/engine/src/dev/codegen.rs b/crates/engine/src/dev/codegen.rs
index b9df04f12..202f7ef0f 100644
--- a/crates/engine/src/dev/codegen.rs
+++ b/crates/engine/src/dev/codegen.rs
@@ -34,7 +34,7 @@ pub use css::{CssNames, css_var_name, css_var_of};
 use css::{css, tok};
 pub(crate) use flutter::{FLUTTER_IMPORT, Place, flutter, flutter_indent};
 use html::html;
-pub(crate) use html::{Markup, class_name};
+pub(crate) use html::{Markup, Names, class_name};
 pub(crate) use swift::swift;
 
 pub fn specs() -> Vec<CommandSpec> {
diff --git a/crates/engine/src/dev/codegen/html.rs b/crates/engine/src/dev/codegen/html.rs
index ac23e6a5b..d1b287c2b 100644
--- a/crates/engine/src/dev/codegen/html.rs
+++ b/crates/engine/src/dev/codegen/html.rs
@@ -30,7 +30,7 @@ fn kind_word(n: &Node) -> &str {
 /// `rogeuin-hwamyeon`, кнопка → `knopka`, über → `uber` (per-codepoint transliteration, the slug
 /// libraries' way); a name left with nothing (symbols only) takes `kind`, and one starting with a
 /// digit keeps the `layer-` prefix.
-pub(crate) fn class_name(name: &str, kind: &str, used: &mut Vec<String>) -> String {
+pub(crate) fn class_name(name: &str, kind: &str, used: &mut Names) -> String {
     let mut base = String::new();
     for c in deunicode::deunicode(name).chars().flat_map(char::to_lowercase) {
         if c.is_ascii_alphanumeric() {
@@ -57,11 +57,30 @@ pub(crate) fn class_name(name: &str, kind: &str, used: &mut Vec<String>) -> Stri
     } else {
         base.to_string()
     };
-    let name = (1..).map(|k| if k == 1 { base.clone() } else { format!("{base}-{k}") }).find(|n| !used.contains(n)).unwrap_or(base);
-    used.push(name.clone());
+    let from = used.next.get(&base).copied().unwrap_or(1);
+    let (k, name) = (from..)
+        .map(|k| (k, if k == 1 { base.clone() } else { format!("{base}-{k}") }))
+        .find(|(_, n)| !used.used.contains(n))
+        .unwrap_or((from, base.clone()));
+    used.next.insert(base, k + 1);
+    used.insert(name.clone());
     name
 }
 
+/// The names [`class_name`] has given out, and the next suffix to try per base, so many layers
+/// sharing one name don't each retry every suffix from 2 (that was cubic in their number).
+#[derive(Default)]
+pub(crate) struct Names {
+    used: std::collections::BTreeSet<String>,
+    next: std::collections::BTreeMap<String, u64>,
+}
+
+impl Names {
+    pub fn insert(&mut self, name: String) {
+        self.used.insert(name);
+    }
+}
+
 fn html_escape(s: &str) -> String {
     s.replace('&', "&amp;").replace('<', "&lt;").replace('>', "&gt;").replace('\n', "<br>")
 }
@@ -104,7 +123,7 @@ pub(crate) struct Markup<'c, 'a> {
     ctx: &'c Ctx<'a>,
     /// Html, React, Vue or Leptos.
     lang: CodeLang,
-    used: Vec<String>,
+    used: Names,
     pub markup: String,
     pub styles: String,
     pub tokens: Tokens,
@@ -161,7 +180,7 @@ impl<'c, 'a> Markup<'c, 'a> {
         Markup {
             ctx,
             lang,
-            used: Vec::new(),
+            used: Names::default(),
             markup: String::new(),
             styles: String::new(),
             tokens: Tokens::default(),
@@ -276,7 +295,7 @@ impl<'c, 'a> Markup<'c, 'a> {
         let root = n.id == self.ctx.root;
         let class = match self.root_class.take().filter(|_| root) {
             Some(c) => {
-                self.used.push(c.clone());
+                self.used.insert(c.clone());
                 c
             }
             None => {
@@ -332,7 +351,7 @@ impl<'c, 'a> Markup<'c, 'a> {
                 let open = open("div");
                 let slot_ident = slot.map(|p| match self.ctx.comp {
                     Some(c) => crate::component_codegen::slot_name(c, p),
-                    None => class_name(&p.ident, "slot", &mut Vec::new()),
+                    None => class_name(&p.ident, "slot", &mut Names::default()),
                 });
                 if let Some(p) = slot.filter(|_| kids.is_empty()) {
                     let content = if leptos {
diff --git a/crates/engine/src/dev/component_codegen.rs b/crates/engine/src/dev/component_codegen.rs
index bf7f442d1..11b380b73 100644
--- a/crates/engine/src/dev/component_codegen.rs
+++ b/crates/engine/src/dev/component_codegen.rs
@@ -11,7 +11,9 @@ use figcraft_doc::{Document, NodeId, NodeKind, PropDef};
 use serde_json::{Value, json};
 
 use crate::cmd::CommandSpec;
-use crate::codegen::{CodeLang, Ctx, FLUTTER_IMPORT, Markup, Place, arkui, class_name, compose, flutter, flutter_indent, indent, literal, swift};
+use crate::codegen::{
+    CodeLang, Ctx, FLUTTER_IMPORT, Markup, Names, Place, arkui, class_name, compose, flutter, flutter_indent, indent, literal, swift,
+};
 use crate::components::{prop_default_value, slot_edited, slots_of, variant_options, variant_props, variant_set};
 use crate::params::{id_of, string, targets};
 use crate::{bad, spec};
@@ -616,14 +618,14 @@ pub(crate) fn value_expr(doc: &Document, c: &Component, p: &Param, value: &Value
 /// The `<slot name="…">` of a slot parameter: unique among the component's slot parameters, unlike
 /// `class_name` called with a fresh list per parameter (two idents can lowercase alike).
 pub(crate) fn slot_name(c: &Component, p: &Param) -> String {
-    let mut used = Vec::new();
+    let mut used = Names::default();
     for q in c.params.iter().filter(|q| matches!(q.kind, ParamKind::Slot)) {
         let name = class_name(&q.ident, "slot", &mut used);
         if q.ident == p.ident {
             return name;
         }
     }
-    class_name(&p.ident, "slot", &mut Vec::new())
+    class_name(&p.ident, "slot", &mut Names::default())
 }
 
 /// The values an instance sets for `c`'s parameters, in order (`None` for other layers): variant
@@ -720,7 +722,7 @@ pub(crate) fn usage_with_styles(doc: &Document, id: NodeId, lang: CodeLang, dept
                 .filter(|(name, _, _)| is_slot(name))
                 .map(|(name, expr, _)| {
                     let slot = c.params.iter().find(|q| q.ident == *name);
-                    let name = slot.map(|p| slot_name(&c, p)).unwrap_or_else(|| class_name(name, "slot", &mut Vec::new()));
+                    let name = slot.map(|p| slot_name(&c, p)).unwrap_or_else(|| class_name(name, "slot", &mut Names::default()));
                     format!("{pad}  <template #{name}>\n{expr}{pad}  </template>\n")
                 })
                 .collect();
@@ -823,7 +825,7 @@ pub fn definition(doc: &Document, c: &Component, lang: CodeLang) -> String {
 
 /// `data-*` attribute names for variant parameters, unique among them (in order).
 fn data_attrs(variants: &[&Param]) -> Vec<String> {
-    let mut used = Vec::new();
+    let mut used = Names::default();
     variants.iter().map(|p| format!("data-{}", class_name(&p.prop, "prop", &mut used))).collect()
 }
 
@@ -832,7 +834,7 @@ fn data_attrs(variants: &[&Param]) -> Vec<String> {
 fn web(doc: &Document, c: &Component, lang: CodeLang) -> (String, String, String) {
     let ctx = Ctx { doc, root: c.comp, comp: Some(c), base: 2 };
     let root_name = c.set.and_then(|s| doc.node(s)).or_else(|| doc.node(c.comp)).map(|n| n.name.clone()).unwrap_or_default();
-    let root_class = class_name(&root_name, "component", &mut Vec::new());
+    let root_class = class_name(&root_name, "component", &mut Names::default());
     let variants: Vec<&Param> = c.params.iter().filter(|p| matches!(p.kind, ParamKind::Variant(_))).collect();
     let attr_names = data_attrs(&variants);
     let pass = |root: NodeId| {
diff --git a/crates/engine/src/dev/devcompare.rs b/crates/engine/src/dev/devcompare.rs
index 6804f1aa4..6d5e39e19 100644
--- a/crates/engine/src/dev/devcompare.rs
+++ b/crates/engine/src/dev/devcompare.rs
@@ -288,8 +288,10 @@ pub fn layer_changes(before: &Document, now: &Document, id: NodeId) -> Vec<PropC
 fn order(before: &Document, now: &Document, id: NodeId) -> Option<(usize, usize)> {
     let parent = now.node(id)?.parent?;
     let (pb, pa) = (before.node(parent)?, now.node(parent)?);
-    let common_b: Vec<NodeId> = pb.children.iter().rev().copied().filter(|c| pa.children.contains(c)).collect();
-    let common_a: Vec<NodeId> = pa.children.iter().rev().copied().filter(|c| pb.children.contains(c)).collect();
+    let (in_b, in_a): (std::collections::BTreeSet<NodeId>, std::collections::BTreeSet<NodeId>) =
+        (pb.children.iter().copied().collect(), pa.children.iter().copied().collect());
+    let common_b: Vec<NodeId> = pb.children.iter().rev().copied().filter(|c| in_a.contains(c)).collect();
+    let common_a: Vec<NodeId> = pa.children.iter().rev().copied().filter(|c| in_b.contains(c)).collect();
     let (ib, ia) = (common_b.iter().position(|c| *c == id)?, common_a.iter().position(|c| *c == id)?);
     (ib != ia).then_some((ib + 1, ia + 1))
 }
diff --git a/crates/engine/src/extensions/widgets.rs b/crates/engine/src/extensions/widgets.rs
index 498fbeb8a..13c6088c4 100644
--- a/crates/engine/src/extensions/widgets.rs
+++ b/crates/engine/src/extensions/widgets.rs
@@ -157,8 +157,9 @@ fn state_of(doc: &Document, w: NodeId) -> Map<String, Value> {
 /// fields), each once, in layer order.
 fn names(doc: &Document, w: NodeId, key: &str) -> Vec<String> {
     let mut out: Vec<String> = Vec::new();
+    let mut seen = std::collections::BTreeSet::new();
     for t in doc.subtree(w).into_iter().filter_map(|i| doc.node(i)?.plugin_data.get(key).cloned()) {
-        if !out.contains(&t) {
+        if seen.insert(t.clone()) {
             out.push(t);
         }
     }
diff --git a/crates/engine/src/html_codegen_tests.rs b/crates/engine/src/html_codegen_tests.rs
index ab7115554..d0de94dba 100644
--- a/crates/engine/src/html_codegen_tests.rs
+++ b/crates/engine/src/html_codegen_tests.rs
@@ -73,6 +73,20 @@ fn non_ascii_layer_names_transliterate_into_readable_classes() {
     assert!(code.contains("<p class=\"rogeuin\">") && code.contains("<p class=\"rogeuin-2\">"), "{code}");
 }
 
+#[test]
+fn many_layers_with_one_name_get_numbered_in_linear_time() {
+    // Each name used to retry every suffix from 2 against a list: cubic in their number.
+    let mut used = crate::codegen::Names::default();
+    let start = std::time::Instant::now();
+    let names: Vec<String> = (0..20_000).map(|_| crate::codegen::class_name("Card / Title", "frame", &mut used)).collect();
+    assert!(start.elapsed() < std::time::Duration::from_secs(5), "{:?}", start.elapsed());
+    assert_eq!(names[0], "card-title");
+    assert_eq!(names[1], "card-title-2");
+    assert_eq!(names[19_999], "card-title-20000");
+    let distinct: std::collections::BTreeSet<&String> = names.iter().collect();
+    assert_eq!(distinct.len(), names.len());
+}
+
 #[test]
 fn other_scripts_and_symbol_names_transliterate_or_fall_back_to_the_kind() {
     let mut s = Session::new();
diff --git a/crates/engine/src/panels_behaviour_tests.rs b/crates/engine/src/panels_behaviour_tests.rs
index d97d25075..0d9266f74 100644
--- a/crates/engine/src/panels_behaviour_tests.rs
+++ b/crates/engine/src/panels_behaviour_tests.rs
@@ -277,6 +277,11 @@ fn renaming_several_layers_by_the_documented_codes() {
     assert_eq!(r(None, "$n", Some(1e30), "a"), "1000000000000");
     assert_eq!(r(None, "$n", Some(f64::NAN), "a"), "1");
     assert_eq!(r(Some("é"), "e", None, "café é"), "cafe e");
+    // A template is expanded once per match, so its length is capped (1,000 characters).
+    let long = "$nn".repeat(400);
+    assert!(crate::rename::BatchRename::new(Some("a"), false, &long, None, None).is_err());
+    assert!(crate::rename::BatchRename::new(None, false, "x", Some(&long), None).is_err_and(|e| e.contains("pattern")));
+    assert!(crate::rename::BatchRename::new(Some("a"), false, &"$nn".repeat(300), None, None).is_ok());
 }
 
 #[test]
diff --git a/crates/engine/src/selection/rename.rs b/crates/engine/src/selection/rename.rs
index b49524759..8f75c6035 100644
--- a/crates/engine/src/selection/rename.rs
+++ b/crates/engine/src/selection/rename.rs
@@ -9,6 +9,9 @@ use figcraft_doc::{Document, NodeId};
 
 /// Longest match pattern accepted (characters).
 const MAX_FIND: usize = 1_000;
+/// Longest replacement or pattern template accepted (characters): each is expanded again for
+/// every match, so its length multiplies the work of a rename.
+const MAX_TEMPLATE: usize = 1_000;
 /// Longest name a rename produces (characters).
 const MAX_NAME: usize = 10_000;
 /// Widest zero padding of a number code.
@@ -50,6 +53,12 @@ impl BatchRename {
             }
             Some(f) => Some(Find::Text(f.to_string())),
         };
+        if replace.chars().count() > MAX_TEMPLATE {
+            return Err(format!("the replacement is longer than {MAX_TEMPLATE} characters"));
+        }
+        if pattern.is_some_and(|p| p.chars().count() > MAX_TEMPLATE) {
+            return Err(format!("the pattern is longer than {MAX_TEMPLATE} characters"));
+        }
         let start = start.filter(|s| s.is_finite()).map_or(1, |s| s.clamp(0.0, 1e12).round() as u64);
         Ok(Self { find, replace: replace.to_string(), pattern: pattern.map(str::to_string), start })
     }

From 6d1b5da863e4b599afe2122b19d99c17c23b63d7 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 23:48:46 -0500
Subject: [PATCH 26/41] fix: create test and benchmark temp directories fresh,
 never adopt an existing one (#1977)

---
 apps/figcraft-cli/src/perf.rs            | 3 ++-
 crates/svg/src/import/structure_tests.rs | 5 +++--
 crates/text/src/fontdb_tests.rs          | 5 ++++-
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/apps/figcraft-cli/src/perf.rs b/apps/figcraft-cli/src/perf.rs
index 404724038..30c801207 100644
--- a/apps/figcraft-cli/src/perf.rs
+++ b/apps/figcraft-cli/src/perf.rs
@@ -498,7 +498,8 @@ fn measure_components(table: &mut Table, col: usize, instances: usize) -> CliRes
     static RUNS: std::sync::atomic::AtomicUsize = std::sync::atomic::AtomicUsize::new(0);
     let run = RUNS.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
     let dir = std::env::temp_dir().join(format!("figcraft-perf-{}-{run}", std::process::id()));
-    std::fs::create_dir_all(&dir).map_err(failed)?;
+    // `create_dir`, not `create_dir_all`: a directory or link already at this predictable name is refused.
+    std::fs::create_dir(&dir).map_err(failed)?;
     let path = dir.join("design-system.figcraft").to_string_lossy().into_owned();
     let (lib_doc, lib_ds) = design_system_document(&spec).map_err(failed)?;
     let mut lib_s = Session::with_document(lib_doc);
diff --git a/crates/svg/src/import/structure_tests.rs b/crates/svg/src/import/structure_tests.rs
index f16abb66a..f5726f896 100644
--- a/crates/svg/src/import/structure_tests.rs
+++ b/crates/svg/src/import/structure_tests.rs
@@ -153,8 +153,9 @@ fn an_image_stretched_into_its_box_stays_stretched() {
 
 #[test]
 fn linked_files_are_never_read() {
-    let dir = std::env::temp_dir().join("figcraft-svg-linked");
-    std::fs::create_dir_all(&dir).unwrap();
+    let dir = std::env::temp_dir().join(format!("figcraft-svg-linked-{}", std::process::id()));
+    // `create_dir` refuses a directory or link someone else planted at this name.
+    std::fs::create_dir(&dir).unwrap();
     let png = dir.join("secret.png");
     std::fs::write(&png, base64::Engine::decode(&base64::engine::general_purpose::STANDARD, PNG).unwrap()).unwrap();
     let href = png.to_string_lossy().replace('\\', "/");
diff --git a/crates/text/src/fontdb_tests.rs b/crates/text/src/fontdb_tests.rs
index 5f0fa522b..cb0930e8a 100644
--- a/crates/text/src/fontdb_tests.rs
+++ b/crates/text/src/fontdb_tests.rs
@@ -139,7 +139,10 @@ fn macos_font_assets_are_found_in_the_asset_store() {
             let _ = std::fs::remove_dir_all(&self.0);
         }
     }
-    let tmp = TempDir(std::env::temp_dir().join(format!("figcraft-font-assets-{}", std::process::id())));
+    // Created fresh: a directory or link already at this predictable name is refused, and not removed.
+    let root = std::env::temp_dir().join(format!("figcraft-font-assets-{}", std::process::id()));
+    std::fs::create_dir(&root).unwrap();
+    let tmp = TempDir(root);
     let store = tmp.0.join("AssetsV2");
     let fonts = store.join("com_apple_MobileAsset_Font7");
     let data = |kind: &std::path::Path| kind.join("0f1e2d.asset").join("AssetData");

From 25d2a201a998b7da404063f3ba3d03257879b509 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 23:49:12 -0500
Subject: [PATCH 27/41] fix(server): clean a published file's name when it is
 taken from the file (#1978)

---
 apps/figcraft-server/src/admin_budget_tests.rs | 8 ++++++++
 apps/figcraft-server/src/store/files.rs        | 3 ++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/apps/figcraft-server/src/admin_budget_tests.rs b/apps/figcraft-server/src/admin_budget_tests.rs
index 71c62897c..10acdabff 100644
--- a/apps/figcraft-server/src/admin_budget_tests.rs
+++ b/apps/figcraft-server/src/admin_budget_tests.rs
@@ -75,3 +75,11 @@ fn codes_are_found_through_the_index_as_before() {
     assert_eq!(store.resolve_code(who(105), &codes[2]).unwrap_err(), CODE_GONE);
     assert_eq!(store.resolve_code(who(106), &codes[3]).unwrap().0, files[3].0);
 }
+
+#[test]
+fn a_name_taken_from_the_file_is_cleaned_like_a_given_one() {
+    let dir = TempDir::new("embedded-name");
+    let mut store = Store::open(dir.path(), config(dir.path()).store()).unwrap();
+    let (file, ..) = store.publish("", &snapshot("Bad\u{1b}[2Jname\u{202E}")).unwrap();
+    assert_eq!(file.name, "Bad[2Jname");
+}
diff --git a/apps/figcraft-server/src/store/files.rs b/apps/figcraft-server/src/store/files.rs
index dba351861..fcc0fd109 100644
--- a/apps/figcraft-server/src/store/files.rs
+++ b/apps/figcraft-server/src/store/files.rs
@@ -95,8 +95,9 @@ impl Store {
             return Err(format!("the file has more than {} layers", self.cfg.core.max_nodes));
         }
         let mut doc = replica.document().clone();
+        // The name the file keeps, whichever one it comes from, is cleaned.
         let name = match clean_name(name) {
-            n if n.is_empty() => doc.name.clone(),
+            n if n.is_empty() => clean_name(&doc.name),
             n => n,
         };
         doc.name = name.clone();

From 6f780211dda0706aa474bcc9be4cec99149acef3 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Tue, 3 Nov 2026 23:49:39 -0500
Subject: [PATCH 28/41] fix(collab): build no repair for a batch refused for
 lack of permission (#1980)

---
 crates/collab/src/server.rs       | 10 ++++++++--
 crates/collab/src/server_tests.rs | 20 ++++++++++++++++++++
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/crates/collab/src/server.rs b/crates/collab/src/server.rs
index d5af681b2..0f11792b7 100644
--- a/crates/collab/src/server.rs
+++ b/crates/collab/src/server.rs
@@ -413,10 +413,14 @@ impl Server {
             // client learned what happened to it from the catch-up.
             ClientMsg::Changes { batch_id, .. } if self.issued.get(&from).is_some_and(|p| batch_id <= p.last_batch) => Vec::new(),
             ClientMsg::Changes { base_seq, batch_id, changes } => {
+                let mut denied = true;
                 let result = match self.limited.get(&from) {
                     Some(Access::View) => Err(Error::Invalid(VIEW_ONLY.into())),
                     Some(Access::Comment) if !changes.iter().all(Change::is_comment) => Err(Error::Invalid(COMMENT_ONLY.into())),
-                    _ => self.accept(from, base_seq, &changes),
+                    _ => {
+                        denied = false;
+                        self.accept(from, base_seq, &changes)
+                    }
                 };
                 if let Some(p) = self.issued.get_mut(&from) {
                     p.note(batch_id, result.is_err());
@@ -430,7 +434,9 @@ impl Server {
                     }
                     Err(e) => {
                         self.note(Journal::Refused { client: from, batch_id });
-                        let fixes = self.fixes(&changes).unwrap_or_default();
+                        // A refusal for lack of permission costs no repair: the client's confirmed copy
+                        // already is the server's state, so the fixes would only repeat it.
+                        let fixes = if denied { Vec::new() } else { self.fixes(&changes).unwrap_or_default() };
                         vec![Outgoing::To(from, ServerMsg::Reject { batch_id, reason: reason(&e), fixes })]
                     }
                 }
diff --git a/crates/collab/src/server_tests.rs b/crates/collab/src/server_tests.rs
index da12f7f35..aafff946d 100644
--- a/crates/collab/src/server_tests.rs
+++ b/crates/collab/src/server_tests.rs
@@ -182,6 +182,26 @@ fn deleted_nodes_can_come_back_but_ids_are_never_handed_out_twice() {
     assert_eq!(s.document(), gone.document());
 }
 
+#[test]
+fn a_viewers_refused_deletion_gets_no_repair() {
+    let (d, _, frame) = doc();
+    let mut s = Server::new(d, "tok", Limits::default());
+    let (id, out) = s.join_as(hello("tok"), crate::message::Access::View).unwrap();
+    let Some(Outgoing::To(_, welcome)) = out.into_iter().next() else { panic!() };
+    let mut v = Client::join(welcome).unwrap();
+    let del = edit(&mut v, |d| d.remove(frame).unwrap());
+    let (reason, fixes) = rejected(
+        &mut s,
+        id,
+        match del {
+            ClientMsg::Changes { changes, .. } => changes,
+            _ => panic!(),
+        },
+    );
+    assert_eq!(reason, crate::VIEW_ONLY);
+    assert!(fixes.is_empty(), "{fixes:?}");
+}
+
 #[test]
 fn fixes_roll_a_rejected_client_back_to_the_server_state() {
     let (d, _, frame) = doc();

From f05e5684987ce2501dbfada35afff41283505229 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Wed, 4 Nov 2026 17:45:24 -0500
Subject: [PATCH 29/41] Pass the Linux signing key to the release workflow
 (#2001)

---
 .github/workflows/release.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 68a705399..975d54114 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -48,3 +48,4 @@ jobs:
       AZURE_SIGNING_ENDPOINT: ${{ secrets.AZURE_SIGNING_ENDPOINT }}
       AZURE_SIGNING_ACCOUNT: ${{ secrets.AZURE_SIGNING_ACCOUNT }}
       AZURE_CERT_PROFILE: ${{ secrets.AZURE_CERT_PROFILE }}
+      LINUX_SIGNING_KEY: ${{ secrets.LINUX_SIGNING_KEY }}

From 2b74d22b0f42853da43c009cea30e29b3d34daed Mon Sep 17 00:00:00 2001
From: Helen Kwok <107752876+helenkwok@users.noreply.github.com>
Date: Mon, 26 Oct 2026 13:35:20 +1030
Subject: [PATCH 30/41] Contributors: credit helenkwok as Helen Kwok

---
 contributors/people.toml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/contributors/people.toml b/contributors/people.toml
index c846d8725..f7ee0420e 100644
--- a/contributors/people.toml
+++ b/contributors/people.toml
@@ -101,3 +101,6 @@ sync_github_name = true
 
 [people.aleksei-suholita]
 real_name = "Oleksii Sukholita"
+
+[people.helenkwok]
+real_name = "Helen Kwok"

From fc3679047e0618110c7153339be7bbb103d95acb Mon Sep 17 00:00:00 2001
From: Helen Kwok <107752876+helenkwok@users.noreply.github.com>
Date: Mon, 26 Oct 2026 13:35:21 +1030
Subject: [PATCH 31/41] feat(web): a host bridge for embedding pages,
 ?host=parent and data-host="page" (#1356)

A page that embeds the web build can hand it a file and get every save back instead of a browser download, and hears about unsaved changes: ?host=parent for a same-origin iframe (postMessage, the protocol the GridCraft, PdfCraft, WordCraft and CADCraft bridges use) and data-host="page" on the canvas for a page that loads the module into its own document (non-bubbling CustomEvents on the canvas). The bridge holds a Transport (Parent or Page) with one send; the pure rules are unit-tested; the hosting guide documents both modes.
---
 ROADMAP.md                        |   3 +
 apps/figcraft-web/Cargo.toml      |   1 +
 apps/figcraft-web/src/host.rs     | 273 ++++++++++++++++++++++++++++++
 apps/figcraft-web/src/hostmode.rs | 109 ++++++++++++
 apps/figcraft-web/src/main.rs     |  14 +-
 apps/figcraft-web/src/web.rs      |  62 ++++++-
 packaging/web/README.md           |  88 ++++++++++
 7 files changed, 544 insertions(+), 6 deletions(-)
 create mode 100644 apps/figcraft-web/src/host.rs
 create mode 100644 apps/figcraft-web/src/hostmode.rs

diff --git a/ROADMAP.md b/ROADMAP.md
index 410705919..2a5fa6fff 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -3,6 +3,7 @@
 **Stage: alpha** · next: beta, ~26 points and ~162–292 h away (one Opus 5.5 agent; ~33–67 h wall-clock with 5 agents)
 
 > **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-30 · **Change:** minor (a connector end moved with Cmd/Ctrl held goes on any part of an object, and stays there as the object moves or resizes; a tap on a plugin panel's button keeps what was typed in its fields; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; library analytics list how many layers and files use each style and variable; the Controller menu names each button as PlayStation and Switch controllers do; widgets draw lines and SVG pictures (plugin API 6); a connector end dropped along a side of a shape attaches to that side (#1708); regression tests pin a rounded shape's one-sided stroke and SVG ids and font families without XML-forbidden characters (#1351, #1124); a damaged image is refused with a reason instead of showing as an empty box (#1474); an image copied in another app pastes again on the desktop, and in the browser for the first time (#492); SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the Frame tool's Phone presets have the iPhone 17 family (#1691); Show in folder works in the Flatpak build and selects the file on Linux (#1701); a dashed line starts and ends with a half-length dash, on the canvas and in exports; the Pages, Layers and Assets search fields keep their text in the middle of the field (#1703); a board connector's path can be reshaped by dragging its path handles (#1710); boards have 16 more shapes (arrows, polygons, star, plus and flowchart symbols), in pickers that lay them out in a grid; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a stroke's Custom style takes a dash pattern of any length as a comma-separated list (#1681); a control request can set its own timeout, up to 10 minutes (`timeoutMs`; `figcraft-cli mcp --attach PORT --timeout SECONDS`) (#1696); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the keyboard's Menu key opens the context menu, as Shift+F10 does; an Open link action can open in place of the prototype, with "Open in new tab" off (gap 15); a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; a live session's welcome sends the document compressed to clients that read it, about seven times smaller (#1665); a control request that times out says truthfully whether it was dropped or is still running and will take effect, and only screenshots and input blame the window (#1673); a board keeps earlier votes' results, listed newest first in Results and deleted one at a time; the object a stamp will stick to is outlined while the stamp tool is over it or a stamp is dragged over it, and board objects take no drops (gap 24); a server can list the files shared from it now for everyone who reaches it, Home ▸ Online shows them and their links carry no secret (`team_files`, part of #742); team library analytics count detached instances per component and file (gap 10); skipping the Open link notice by command is saved with the preferences at once (gap 15); a selected connector's bar on a board sets its start and end points, solid or dashed, its weight and any colour (#1596); cells copied from a spreadsheet paste onto a board as a table; a long layer name stays on one line in the Export button and the Dev Mode header, ending with an ellipsis, and no longer covers the Design panel (#1650); with hundreds of layers selected, the Design panel and the selection overlays stop going over the whole selection on every frame, so dragging 648 layers averages about 1.1 ms of UI per frame (#1571); plugin panels show pictures: an `image` control, base64 within 256 KB and 4,096 px a side, named by its label (gap 6); `.fig` connector labels without a saved snapshot are kept, centred on their line (gap 1); a drag moving many layers re-runs only what sits around them, not each layer's bindings, sizing, text and instance checks, on every move (#1571); damaged font tracking table offsets are checked instead of wrapping on 32-bit targets, and font indexing makes its existing offset bounds explicit (#1125); Bosnian (`bs`) draft catalog; text style dedupe is O(spans) via a last-two cache and fingerprint buckets (#1102); pasted layers whose image the clipboard lacks are named and show a placeholder that reads as missing (#1646); paint-style colours on layers pasted from another design app keep their style instead of turning black (#1638); progress docs cleaned of what merges left twice: rows merged into one, repeated status items removed, and `cargo xtask docs` (in `ci`) fails on a repeated table row or status item; a name typed for a variable or collection finds the one with that exact id before one named like it, and stored mode ids, font family variables and the panels' labels read exact ids (#1613); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); `.fig` elbowed and curved connectors without a saved path are routed like board connectors instead of drawn straight (gap 1); every file a command reads whole by path is a regular file within a cap that fits it: documents 16 GiB, placed images 256 MiB, CLI scripts 1 GiB; `figcraft-cli connect publish` publishes a code repository's code connect mappings to a design file (gap 16); while a drag only moves a large selection, its outlines, box, slots, spacing and Design panel values are worked out once and shifted, not rebuilt on every move (#1571); Shift+Cmd/Ctrl+Enter on a selected board shape adds the next shape already joined to it, and goes on typing (#1597); an imported or pasted file finds an installed family under the other names its fonts give it, and with other case and spacing, instead of reporting it missing (#1292); a development example generates figcraft-cli's shell completions and man pages from its clap definitions (part of #1396); `.fig` ZIP image reads share a total byte budget and count skipped images in the import warnings (#1076); German terminology corrections (M10): gradient stops, OpenType stylistic sets and the Home-screen preference; a component set's property rows fit the 240 px right panel: variant values wrap two to a line there and every + and − stays in view; the server key is checked by comparing SHA-256 hashes of the presented and the kept key, as the deployment guide says (#1130); opening a file contacts no team library server it names until you check it (#1097); a hostile server can no longer grow a client's memory with made-up people, and a session remembers a bounded number of deleted layer ids (#1121); `doc.list` gives AI agents and plugins the open files' names, not their paths (#1117); with a large selection, frames where nothing changed reuse the selection's outlines, box and slots and the Design panel's instance and position values instead of working them out again (#1571); team libraries and plugins larger than the 16 MiB download burst can be downloaded again, more slowly (#1089); a batch keeps one undo snapshot, not one per step (#1099); files nested 256 levels deep import on the browser's 1 MB stack (#1101); SVG and PDF exports count pattern sources and the renders they embed from the layer's depth, so one cap bounds a whole export (#1082); an explicit variables file path (`variable.import`, the `variables` of `file.open` and `file.import`) is refused past 256 MiB or when it isn't a regular file, as the sibling `variables.json` already was (part of #1114); joining and leaving a file nobody is editing reads and writes nothing on the server: it stays loaded a minute after everyone leaves (#1074); opening a `.figcraft` file unpacks at most 6 GiB in all (2 GiB in the browser), every area together (#1079); hovering the canvas hit-tests once per pointer move, not on every frame, and moving an auto layout frame no longer lays out its contents again on every move (#1571); `.fig` instance expansion no longer walks variable nodes for every instance or copies every outer override row into each nested instance (#1077); `comment.people` lists names that were only @mentioned, and `comment.next` and `comment.prompt` carry the mentions too (#1415); grid auto-placement looks for free cells a 64-bit word at a time and skips what blocks it, with the same placements (#1083); with the pen out, Enter or a double-click ends the path and edits the vector with the Move tool instead of drawing on (#1430); a recovery copy made while a version is previewed holds the file, not the version shown; a FigJam `.jam` file opens as a board (#1342); the Actions palette offers only commands that run from it, and no second row reading like a menu item: Place image opens the file dialog (#1574); share links can comment: a third access level beside edit and view, whose holder sees the file live and adds, replies to, reacts to and resolves comments but can't change the design; Preferences ▸ Scroll wheel zoom: a mouse wheel zooms the canvas about the pointer and Cmd/Ctrl+wheel scrolls (#1390); `comment.list {mentions}` lists only the threads that @mention a name (#1415); in the browser an internal error that stops the page keeps its unsaved files, which open again on reload (#1123); boolean operations refuse input past their caps, and a boolean group past them draws without its result (#1104); figcraft-cli parses its arguments with clap, following RFC-0012 (#1396); the selection and hover outlines of rounded rectangles and frames follow their corners (#1506); component properties keep the order they were made in when one is renamed, and Make slot asks for the slot's name first (#1536, #1537); the browser build publishes files to a server, so Share ▸ Online and Publish to server work there (#917); the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); SVG import reads `color()` and `color-mix()` colours, with a note and a grey for those it can't (#1550); the portable Windows zip keeps its settings, recovery copies and plugins in `config\` beside the executable, starting with an installed copy's preferences; the window starts on other graphics when its first ones fail before the first frame: Direct3D 12 compiles with FXC and no device compiles wgpu's indirect-validation shaders, then Vulkan, OpenGL and lower requirements on the power-saving GPU (#965, #1438); Thai, Lao, Khmer and Burmese lines break between words (#1219); an AI agent attached over MCP shows where it works (#1416); a manual overlay's position can be dragged on the canvas (#405); one name for live sessions and comments: Preferences ▸ Your name, in the Join dialog too, kept in the browser, and a rename shows at once in the sessions you are in (#1380); requests that change a server's files have a budget per address, the server key's too, and join codes are found by their hash (#1075); the Join dialog shows a join from the click until its file is ready, with Cancel, and a failed join with Try again (#1381); SVG import draws each pattern tile once per scale, within the layer budget (#1080); Vietnamese letters typed with combining marks (decomposed) take one font that has every mark, instead of missing-glyph boxes beside the letter (#1478); comment.list reports each message's @mentions (#1415); mask groups draw only over the area they can paint, and nested isolated layers share one memory budget (#1061); components can't contain their own instances, directly or through other components; `edit.duplicate` returns an id map with `map: true` (#995); the batches kept for reconnecting apps are bounded in bytes by default, and `figcraft-server` takes `max_log_mb` (#1069); MCP and control calls name their document (#998); sibling placement in live sessions searches instead of counting (#1065); an AI agent attached over MCP comments under its own name, with an Agent label (#1414); the instance-swap menus have a search field (#1338); a refused batch's fixes take time linear in the batch (#1063); the connector tool shows the connector it will make while dragging, ends snapping to attach points (#1387); large images on the canvas draw from a smaller copy, so two 16k images no longer lag (#1483); a file's JPEG thumbnail can't crash the home screen (#1491's progressive JPEG check, now shared); `.fig` import: library text styles linked by asset key, and override rows restating a nested level (#1234); `.fig` import keeps the file's saved line breaks while the text and its box are unedited (#1236); Download a missing free font from the Missing fonts window (`font.download`, #754); the web build's wasm back under its 24 MiB gate (#1472); shadows of images with transparent pixels follow their alpha (#1289); Crop image: Object ▸ Crop image, the right-click menu and the image fill row enter crop mode (`image.crop`, #1464); offline Penpot 2.x import/export (#1143); optional batch continue-on-error with per-step outcomes (#1386); the Design panel's sections on one grid (#858); FigJam outer shape outlines and sticky body fallback beside author text (#1341, #1397); images placed at their own size, 2x screenshots in points (#1360); the toolbar on one 32 pt grid, without its Resources button (#1210); M4: zero-length round-capped dashes draw dots; dash expansion uses the existing safety budget; extracted from #1143; Arabic draft catalog; scaled instances keep their scale when their main is rebuilt (#922); .fig embedded images are copied once per blob, not once per hash (#1059); page ruler guides survive save and reopen (#1476); colour picker LCH and OKLCH models; non-ASCII layer names transliterate in code export (#1235); branches in live sessions and branch history entries, gap 17; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; Installed weights of an embedded font family (#1246); `.sketch` import, best effort (Sketch 48 and newer); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, the iteration marks 〱–〵 and the halfwidth parentheses, with behaviour cases for each; Adobe Fonts found on macOS (#298); egui 0.37 hidden-capture deadline contract; Dev Mode measurements kept on the canvas and a read-only layers panel; boards: a board area row and progress entry; community fixes in #507, #510, #529 and #530: auto-save, a text box by dragging, batch step references, removing someone from a live session, Russian and Turkish catalogs reviewed, Czech and Indonesian drafts, the Japanese draft completed, zoom previews, the web clipboard, Alt-drag snapping and Cmd+D repeat, recovery copies, crash and rollback fixes, colour emoji, `.fig` import fixes; earlier changes are in the revision history below) · **Target:** Figma Design (desktop app 126.10.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-26 · **Change:** minor (web host bridge: `?host=parent` in an iframe or `data-host="page"` on the canvas hands a page the app's files instead of downloads and reports unsaved changes, documented in the hosting guide; colour picker LCH and OKLCH models; non-ASCII layer names transliterate in code export (#1235); branches in live sessions and branch history entries, gap 17; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; Installed weights of an embedded font family (#1246); `.sketch` import, best effort (Sketch 48 and newer); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, the iteration marks 〱–〵 and the halfwidth parentheses, with behaviour cases for each; Adobe Fonts found on macOS (#298); egui 0.37 hidden-capture deadline contract; Dev Mode measurements kept on the canvas and a read-only layers panel; boards: a board area row and progress entry; community fixes in #507, #510, #529 and #530: auto-save, a text box by dragging, batch step references, removing someone from a live session, Russian and Turkish catalogs reviewed, Czech and Indonesian drafts, the Japanese draft completed, zoom previews, the web clipboard, Alt-drag snapping and Cmd+D repeat, recovery copies, crash and rollback fixes, colour emoji, `.fig` import fixes; earlier changes are in the revision history below) · **Target:** Figma Design (desktop app 126.10.7)
 
 FigCraft is a clean-room, open-source, pure-Rust reimplementation of the Figma design workflow,
 native on macOS, Windows, Linux and FreeBSD and in the browser, fully drivable by agents through
@@ -143,6 +144,7 @@ Ranked; detail and milestones in [`docs/roadmap.md`](docs/roadmap.md).
 - **2026-10-27** · Batch continue-on-error (M0.9, #1386): `command.batch` and MCP `batch` accept `onError: "continue"`, roll back failed steps individually and return one outcome per step. References to failed steps fail with both step numbers; successful edits stay one undo step, and the default abort mode is unchanged. Engine and MCP regression tests. Numbers unchanged.
 - **2026-10-26** · Non-ASCII layer names transliterate in code export (M6, #1235): `class_name` runs the name through `deunicode` before its ASCII filter, so 로그인 화면 → `rogeuin-hwamyeon`, кнопка → `knopka`, über → `uber` in the HTML/CSS/React/Leptos class names, component roots and `data-*` variant attributes (SwiftUI/Compose type names unchanged); a name left with nothing (symbols only) takes the node's kind (`.text`, `.frame`) instead of `layer-`, and the 40-character cut lands on a word boundary. New dependency: deunicode (pure Rust tables, zero deps, BSD-3-Clause, the `slug` crate's base). `html_codegen_tests`. Numbers unchanged.
 - **2026-10-25** · M6, #1143: offline Penpot 2.x open/import/export through the editor, CLI and MCP using the existing document model. Unsupported layout settings retain saved positions and bounded source metadata with warnings; font binaries and toggle-overlay are reported, and provider fonts are never downloaded. Shared ZIP/JSON/token budgets guard untrusted input. Figma parity numbers unchanged.
+- **2026-10-26** · Web host bridge: `?host=parent` (a same-origin page embedding FigCraft in an iframe) or `data-host="page"` on the canvas (the page's own document, over non-bubbling `CustomEvent`s) opens the host's file like File ▸ Open (over the browser open limit of 512 MB refused) and takes every file the app would otherwise download (`figcraft:save` with the `saveAs` rule), plus `figcraft:dirty`, `figcraft:ready` and `figcraft:failed`; `?author=` names the user for comments and board notes; host mode starts with no document. Unit tests cover the opt-in rule (only the exact `page` value), the `saveAs` rule and the open-name fallback. Numbers unchanged.
 - **2026-10-25** · egui 0.37 capture lifecycle: screenshots with hidden or unknown visibility queue, request a hidden paint, and expire after 60 seconds if no capture arrives (headless-tested contract). Logic-only edits, saves and inspection continue while hidden. Native visible GUI and forced hidden-window paint, browser and Wayland behavior remain unqualified; parity percentages are unchanged.
 - **2026-10-24** · Open, Save and the folder dialogs start in the folder of the last file or folder picked in the run (#1290): the Linux portal does not remember it between dialogs as the macOS and Windows panels do. A folder deleted since falls back to the system's choice. No numbers change.
 - **2026-10-24** · Boards (M12): board pages get a dot grid under their layers (drawn by the canvas render after the page colour, thinned out when zoomed out); a selected connector shows its ends as handles, and dragging one onto another object re-attaches it there, onto empty canvas leaves it free (`board.reattach`, one undo step, also over MCP); connectors can be curved, and elbows go around the objects they join when the short way would cross them. Checked in the app, through MCP and in the web build ([boards-parity](docs/boards-parity.md)).
@@ -492,6 +494,7 @@ Ranked; detail and milestones in [`docs/roadmap.md`](docs/roadmap.md).
 | 2026-10-27 | minor | Placed images keep their own size (M7, #1360): dropping, Place image, paste and `image.place` put an image at its pixel size and fit only a side past 4096 px (they fitted it into 1000 px); a PNG whose `pHYs` records a whole 2x–4x multiple of 72 dpi (macOS screenshots record 144 dpi) is placed at its point size, so an 800 × 600 px capture comes in at 400 × 300; other densities, such as 300 dpi scans, keep their pixel size; the image data stays at full resolution and an explicit width or height still wins. On macOS, paste reads the clipboard's PNG as is (its density and colour profile kept) and falls back to the decoded image. Numbers unchanged |
 | 2026-10-26 | minor | Non-ASCII layer names transliterate in code export (M6, #1235): `class_name` transliterates through the new `deunicode` dependency (pure Rust tables, zero deps, BSD-3-Clause), so Korean, Cyrillic, Latin-diacritic and CJK names become readable ASCII classes (`rogeuin-hwamyeon`, `knopka`, `uber`, `an-niu`) in HTML/CSS/React/Leptos output, component roots and `data-*` variant attributes; symbols-only names take the node's kind (`.text`) instead of `layer-`, and the 40-character cut lands on a word boundary. `html_codegen_tests` updated and extended. Numbers unchanged |
 | 2026-10-25 | minor | M6, #1143: offline Penpot 2.x open/import/export through the editor, CLI and MCP using the existing document model. Unsupported layout settings retain saved positions and bounded source metadata with warnings; font binaries and toggle-overlay are reported, and provider fonts are never downloaded. Shared ZIP/JSON/token budgets guard untrusted input. Figma parity numbers unchanged. |
+| 2026-10-26 | minor | Web host bridge: `?host=parent` (a same-origin page embedding FigCraft in an iframe) or `data-host="page"` on the canvas (the page's own document, over non-bubbling `CustomEvent`s) opens the host's file like File ▸ Open and takes every file the app would otherwise download, with `figcraft:ready`, `figcraft:open`, `figcraft:save` (a `saveAs` rule), `figcraft:dirty` and `figcraft:failed`; `?author=` names the user for comments and board notes; documented in the hosting guide. Numbers unchanged |
 | 2026-10-25 | minor | egui 0.37 capture lifecycle: screenshots with hidden or unknown visibility queue, request a hidden paint, and expire after 60 seconds if no capture arrives (headless-tested contract). Logic-only edits, saves and inspection continue while hidden. Native visible GUI and forced hidden-window paint, browser and Wayland behavior remain unqualified; parity percentages are unchanged. |
 | 2026-10-24 | minor | Server memory (#1134): when the last person leaves a file nobody edited, figcraft-server keeps the client ids it issued in the log instead of rewriting the snapshot (compaction still follows `compact_after`/`compact_mb` and edits), and a snapshot is encoded straight into its file buffer, without a second copy of the body; the file format is unchanged. Numbers unchanged |
 | 2026-10-24 | minor | Boards (M12): a dot grid on board pages under the layers, connector ends dragged onto other objects or empty canvas (`board.reattach`), curved connectors, elbows that go around what they join. Boards row ~35% → ~37%, ~20% → ~21%, 30–60 h → 28–56 h; headline numbers unchanged (boards are outside the weighted sum) |
diff --git a/apps/figcraft-web/Cargo.toml b/apps/figcraft-web/Cargo.toml
index 09eca5d0f..75f7e312c 100644
--- a/apps/figcraft-web/Cargo.toml
+++ b/apps/figcraft-web/Cargo.toml
@@ -31,3 +31,4 @@ wasm-bindgen = "0.2"
 js-sys = "0.3"
 wasm-bindgen-futures = "0.4"
 web-sys = { version = "0.3", features = ["Window", "Document", "Element", "HtmlCanvasElement", "HtmlElement", "HtmlAnchorElement", "Node", "Blob", "BlobPropertyBag", "ClipboardEvent", "DataTransfer", "File", "FileList", "HtmlInputElement", "EventTarget", "Url", "Location", "MediaQueryList", "Navigator", "Gamepad", "GamepadButton", "GamepadMappingType", "Storage"] }
+web-sys = { version = "0.3", features = ["Window", "Document", "Element", "Event", "HtmlCanvasElement", "HtmlElement", "HtmlAnchorElement", "Node", "Blob", "BlobPropertyBag", "File", "FileList", "HtmlInputElement", "EventTarget", "Url", "Location", "MediaQueryList", "Navigator", "Gamepad", "GamepadButton", "GamepadMappingType", "MessageEvent", "UrlSearchParams", "CustomEvent", "CustomEventInit"] }
diff --git a/apps/figcraft-web/src/host.rs b/apps/figcraft-web/src/host.rs
new file mode 100644
index 000000000..d08bdf45b
--- /dev/null
+++ b/apps/figcraft-web/src/host.rs
@@ -0,0 +1,273 @@
+//! Host modes: a page that runs FigCraft (as an `<iframe>`, or in its own document) opens
+//! documents in it and stores what it saves instead of the browser downloading. The same
+//! messages as the other Crafting Apps' bridges.
+//!
+//! ## `?host=parent` — an `<iframe>` (such as a Nextcloud app)
+//!
+//! The framing page and FigCraft talk over `postMessage` between same-origin windows. Messages
+//! are plain objects with a `type`:
+//!
+//! - `figcraft:ready` (to the parent): `{ version }`, sent once the app is running and
+//!   listening; send a file now.
+//! - `figcraft:open` (from the parent): `{ name, bytes }`, bytes an `ArrayBuffer` or
+//!   `Uint8Array`. It opens exactly as a file picked with File › Open or dropped on the window
+//!   would (the app's own open queue, with its "Opening as a new file" card). A payload over the
+//!   browser's own open limit ([`figcraft_ui_egui::browser_can_read`]'s 512 MB) is refused before
+//!   its bytes are copied, and anything malformed is ignored.
+//! - `figcraft:save` (to the parent): `{ name, saveAs, bytes }` (a transferred `ArrayBuffer`) for
+//!   every file the app hands its download service — in host mode nothing reaches the browser's
+//!   downloads. The parent stores it and reports failures itself. `saveAs` says whether the file
+//!   becomes the document's file ([`crate::hostmode::save_as`]):
+//!   - A Save of the file the host opened, under its own name: `false`.
+//!   - A document file (`.figcraft` or `.json`, the formats `file.save` and `file.saveAs` write)
+//!     under a name the host didn't open — Save As, or a Save of a document the host never sent
+//!     (an untitled one): `true`. It becomes the document's file; the next Save sends its name
+//!     with `false`. Names compare without case.
+//!   - Everything else is a copy or export that never becomes the document: `false` — rendered
+//!     images, SVG and PDF, `.fig` copies, and the variables exports (a `.variables.json`
+//!     sidecar's `.json` extension doesn't make it a document).
+//! - `figcraft:dirty` (to the parent): `{ dirty }` whenever unsaved changes appear or go away.
+//! - `figcraft:failed` (to the parent): `{ error }` when the app couldn't start.
+//!
+//! Only the parent window on the page's own origin is heard or answered.
+//!
+//! ## `data-host="page"` — the page's own document
+//!
+//! A page that loads the module into its own document (its own `<canvas id="figcraft_canvas"
+//! data-host="page">`, no iframe) gets the same behaviour over DOM `CustomEvent`s on the canvas
+//! instead of `postMessage`: the same four events outward (`ready`, `save`, `dirty`, `failed`,
+//! with the message fields as the event's `detail`), and the page dispatches `figcraft:open` on
+//! the canvas with `detail: { name, bytes }` to open a document. Events don't bubble, so two
+//! editors on one page can't hear each other, and the canvas is the only target FigCraft
+//! listens on.
+//!
+//! In host mode the app starts with no document (the home screen) and the host sends the file to
+//! edit; `?author=` names the user for comments and board notes.
+
+use std::cell::{Cell, RefCell};
+use std::rc::Rc;
+
+use figcraft_ui_egui::FigApp;
+use wasm_bindgen::JsCast as _;
+use wasm_bindgen::JsValue;
+use wasm_bindgen::closure::Closure;
+
+/// The longest user name taken from `?author=`.
+const MAX_AUTHOR_CHARS: usize = 200;
+
+/// Files the host sent, on their way to the app's own open queue ([`figcraft_ui_egui::pending_open`]):
+/// `(name, bytes)`.
+pub type OpenQueue = Rc<RefCell<Vec<(String, Vec<u8>)>>>;
+
+/// How a host page is reached. The modes behave the same; they differ only in how an event goes
+/// out ([`Transport::send`]) and how an open request comes in ([`Bridge::listen`]).
+#[derive(Clone)]
+enum Transport {
+    /// `?host=parent`: `postMessage` between same-origin windows.
+    Parent { window: web_sys::Window, parent: web_sys::Window, origin: String },
+    /// `data-host="page"`: DOM `CustomEvent`s on the editor's own canvas.
+    Page { canvas: web_sys::HtmlCanvasElement },
+}
+
+impl Transport {
+    /// Hand an event to the host. In parent mode this is a `postMessage` whose object carries a
+    /// `type` field; in page mode a `CustomEvent` of that name on the canvas, whose `detail`
+    /// holds the fields and which never bubbles (two editors on one page must not hear each
+    /// other). `transfer` hands an `ArrayBuffer` to the parent instead of copying it (parent
+    /// mode only; the page's document already shares the buffer's bytes).
+    fn send(&self, event: &str, fields: &[(&str, JsValue)], transfer: Option<&js_sys::ArrayBuffer>) -> Result<(), String> {
+        match self {
+            Transport::Parent { parent, origin, .. } => {
+                let mut message_fields = Vec::with_capacity(fields.len() + 1);
+                message_fields.push(("type", JsValue::from_str(event)));
+                message_fields.extend_from_slice(fields);
+                let message = message(&message_fields).ok_or_else(|| "couldn't build the message".to_string())?;
+                let sent = match transfer {
+                    Some(buffer) => parent.post_message_with_transfer(&message, origin, &js_sys::Array::of1(buffer)),
+                    None => parent.post_message(&message, origin),
+                };
+                sent.map_err(|e| js_error(&e, "couldn't post the message"))
+            }
+            Transport::Page { canvas } => {
+                let detail = message(fields).ok_or_else(|| "couldn't build the event detail".to_string())?;
+                let init = web_sys::CustomEventInit::new();
+                // The builder methods (`bubbles(..)`, `detail(..)`) are deprecated in web-sys
+                // 0.3.106 and fail clippy -D warnings; use the setters.
+                init.set_bubbles(false);
+                init.set_detail(&detail);
+                let custom = web_sys::CustomEvent::new_with_event_init_dict(event, &init).map_err(|e| js_error(&e, "couldn't create the event"))?;
+                // A listener calling `preventDefault` would be the bool; not a send failure.
+                canvas.dispatch_event(&custom).map_err(|e| js_error(&e, "couldn't dispatch the event"))?;
+                Ok(())
+            }
+        }
+    }
+}
+
+#[derive(Clone)]
+pub struct Bridge {
+    transport: Transport,
+    /// The file the host opened, and after a `saveAs` hand-over the document's file: the name a
+    /// Save under (`saveAs: false`) is decided against.
+    host_file: Rc<RefCell<Option<String>>>,
+    /// The unsaved-changes state last reported to the host.
+    reported: Rc<Cell<Option<bool>>>,
+}
+
+impl Bridge {
+    /// The parent bridge for `?host=parent`. `None` when the page isn't framed (there is no
+    /// parent to talk to), so opening that URL directly stays the normal app with downloads, or
+    /// when the parent is on another origin: messages only go to this origin, so the browser
+    /// would drop every save without an error while the document showed as saved.
+    pub fn new() -> Option<Self> {
+        let window = web_sys::window()?;
+        let parent = window.parent().ok().flatten()?;
+        if js_sys::Object::is(&parent, &window) {
+            return None;
+        }
+        let origin = window.location().origin().ok()?;
+        // An opaque origin (a `file://` page in some browsers) can't be a `postMessage` target.
+        if origin == "null" {
+            return None;
+        }
+        // Reading another origin's location throws, which is `None` too.
+        if parent.location().origin().ok()? != origin {
+            return None;
+        }
+        Some(Self { transport: Transport::Parent { window, parent, origin }, host_file: Rc::default(), reported: Rc::default() })
+    }
+
+    /// The page bridge for `data-host="page"`: the host page runs FigCraft in its own document
+    /// and hears the editor's DOM `CustomEvent`s on this canvas.
+    pub fn for_page(canvas: &web_sys::HtmlCanvasElement) -> Self {
+        Self { transport: Transport::Page { canvas: canvas.clone() }, host_file: Rc::default(), reported: Rc::default() }
+    }
+
+    /// Hear the files the host sends, and queue each one on `opens` for the app's own open path
+    /// (the shell drains it into [`figcraft_ui_egui::pending_open`] every frame, so a host file
+    /// opens like a dropped one).
+    pub fn listen(&self, opens: OpenQueue, ctx: egui::Context) {
+        match &self.transport {
+            Transport::Parent { window, parent, origin } => {
+                let parent = parent.clone();
+                let origin = origin.clone();
+                let on_message = Closure::<dyn FnMut(web_sys::MessageEvent)>::new(move |event: web_sys::MessageEvent| {
+                    if event.origin() != origin || !event.source().is_some_and(|s| js_sys::Object::is(&s, &parent)) {
+                        return;
+                    }
+                    let data = event.data();
+                    if string(&data, "type").as_deref() != Some("figcraft:open") {
+                        return;
+                    }
+                    deliver_open(&opens, &ctx, &data);
+                });
+                if window.add_event_listener_with_callback("message", on_message.as_ref().unchecked_ref()).is_ok() {
+                    // The listener lives as long as the page.
+                    on_message.forget();
+                }
+            }
+            Transport::Page { canvas } => {
+                let on_open = Closure::<dyn FnMut(web_sys::Event)>::new(move |event: web_sys::Event| {
+                    // A plain `Event` of the same name carries no detail; only a `CustomEvent`.
+                    let Some(open) = event.dyn_ref::<web_sys::CustomEvent>() else { return };
+                    deliver_open(&opens, &ctx, &open.detail());
+                });
+                if canvas.add_event_listener_with_callback("figcraft:open", on_open.as_ref().unchecked_ref()).is_ok() {
+                    // The listener lives as long as the page.
+                    on_open.forget();
+                }
+            }
+        }
+    }
+
+    /// `?author=`: the host's name for the user signs comments and board notes.
+    pub fn set_author(app: &mut FigApp, author: &str) {
+        let author: String = author.trim().chars().take(MAX_AUTHOR_CHARS).collect();
+        if !author.is_empty() {
+            app.session.prefs.user_name = author;
+        }
+    }
+
+    pub fn post_ready(&self) {
+        let _ = self.transport.send("figcraft:ready", &[("version", env!("CARGO_PKG_VERSION").into())], None);
+    }
+
+    /// The app couldn't start (no WebGPU or WebGL2, for example): let the host say so.
+    pub fn post_failed(&self, error: &str) {
+        let _ = self.transport.send("figcraft:failed", &[("error", error.into())], None);
+    }
+
+    /// Hand a file the app would otherwise download to the host; `false` when nothing was
+    /// delivered. The `saveAs` rule is this module's documentation's.
+    pub fn post_save(&self, path: &str, bytes: &[u8]) -> bool {
+        let name = file_name(path);
+        let host_file = self.host_file.borrow().clone();
+        let save_as = crate::hostmode::save_as(&name, host_file.as_deref());
+        // After a Save As hand-over the document's file is the new one: the next Save of it sends
+        // its name with `saveAs: false`.
+        if save_as {
+            *self.host_file.borrow_mut() = Some(name.clone());
+        }
+        // `figcraft:save` carries the bytes as an `ArrayBuffer`; the parent bridge transfers it.
+        let buffer = js_sys::Uint8Array::from(bytes).buffer();
+        let fields: [(&str, JsValue); 3] = [("name", name.as_str().into()), ("saveAs", save_as.into()), ("bytes", buffer.clone().into())];
+        self.transport.send("figcraft:save", &fields, Some(&buffer)).is_ok()
+    }
+
+    /// Report unsaved changes when they appear or go away, not every frame.
+    pub fn set_dirty(&self, dirty: bool) {
+        if self.reported.get() != Some(dirty) && self.transport.send("figcraft:dirty", &[("dirty", dirty.into())], None).is_ok() {
+            self.reported.set(Some(dirty));
+        }
+    }
+}
+
+/// The file an open message or event carries, queued for the app's own open path, or nothing when
+/// the payload isn't one (no bytes, or over the open limit).
+fn deliver_open(opens: &OpenQueue, ctx: &egui::Context, data: &JsValue) {
+    let name = crate::hostmode::open_name(string(data, "name").as_deref());
+    let Some(bytes) = payload_bytes(data, &name) else { return };
+    opens.borrow_mut().push((name, bytes));
+    ctx.request_repaint();
+}
+
+/// The `bytes` of an open message or event as owned bytes, refused over the browser's own open
+/// limit ([`figcraft_ui_egui::browser_can_read`]) before they are copied. `bytes` is an
+/// `ArrayBuffer` or `Uint8Array`.
+fn payload_bytes(data: &JsValue, name: &str) -> Option<Vec<u8>> {
+    let bytes = js_sys::Reflect::get(data, &JsValue::from_str("bytes")).ok()?;
+    let len = if let Some(array) = bytes.dyn_ref::<js_sys::Uint8Array>() {
+        array.length() as f64
+    } else {
+        bytes.dyn_ref::<js_sys::ArrayBuffer>()?.byte_length() as f64
+    };
+    if figcraft_ui_egui::browser_can_read(name, len).is_err() {
+        log::warn!("host file {name} is too large to open in the browser; not opened");
+        return None;
+    }
+    Some(if let Some(array) = bytes.dyn_ref::<js_sys::Uint8Array>() { array.to_vec() } else { js_sys::Uint8Array::new(&bytes).to_vec() })
+}
+
+/// The last component of `path`, or the whole of it when there is none.
+fn file_name(path: &str) -> String {
+    std::path::Path::new(path).file_name().map(|n| n.to_string_lossy().to_string()).unwrap_or_else(|| path.to_string())
+}
+
+/// A message object or `CustomEvent` detail with the given fields, or `None` if one couldn't be
+/// built (a field that isn't a valid property name, say).
+fn message(fields: &[(&str, JsValue)]) -> Option<js_sys::Object> {
+    let m = js_sys::Object::new();
+    for (key, value) in fields {
+        js_sys::Reflect::set(&m, &JsValue::from_str(key), value).ok()?;
+    }
+    Some(m)
+}
+
+fn string(data: &JsValue, key: &str) -> Option<String> {
+    js_sys::Reflect::get(data, &JsValue::from_str(key)).ok()?.as_string()
+}
+
+/// A `JsValue` error as a string, after `what` went wrong.
+fn js_error(e: &JsValue, what: &str) -> String {
+    format!("{what}: {}", e.as_string().unwrap_or_else(|| format!("{e:?}")))
+}
diff --git a/apps/figcraft-web/src/hostmode.rs b/apps/figcraft-web/src/hostmode.rs
new file mode 100644
index 000000000..54cfbcbc2
--- /dev/null
+++ b/apps/figcraft-web/src/hostmode.rs
@@ -0,0 +1,109 @@
+//! Pure host-mode rules, shared by the bridge ([`crate::host`]) and testable without a browser
+//! (like [`crate::query`]): what opts a page into hosting FigCraft in its own document, the name
+//! the bridge fills in when an open request has none, and whether a handed-over file becomes the
+//! document's file.
+
+/// The one `data-host` value that opts a page in: the exact string `"page"`.
+pub const PAGE_HOST: &str = "page";
+
+/// The file name used when an open request carries no usable one.
+pub const DEFAULT_OPEN_NAME: &str = "Untitled.figcraft";
+
+/// The extensions of files that can be a document's own file: the formats `file.save` and
+/// `file.saveAs` write (`file.open` opens both as native documents). A `.fig` file is an export
+/// copy instead, and so is everything else the app hands over (rendered images, SVG, PDF,
+/// variables).
+const DOC_EXTS: &[&str] = &["figcraft", "json"];
+
+/// The suffix `variable.export`'s downloads carry: a `.json` that is a variables sidecar, not a
+/// document, so its extension alone can't tell the `saveAs` decision.
+const VARIABLES_SIDECAR: &str = ".variables.json";
+
+/// Does this `data-host` value ask for page host mode? Only the exact value [`PAGE_HOST`] counts;
+/// anything else is ignored, so the page host mode stays opt-in. `?host=parent`, the parent
+/// bridge's URL opt-in, is answered before this is asked.
+pub fn page_host_requested(data_host: Option<&str>) -> bool {
+    data_host == Some(PAGE_HOST)
+}
+
+/// A usable file name for an open request: the host's name when it isn't blank, else the
+/// [`DEFAULT_OPEN_NAME`].
+pub fn open_name(name: Option<&str>) -> String {
+    name.filter(|n| !n.trim().is_empty()).unwrap_or(DEFAULT_OPEN_NAME).to_string()
+}
+
+/// Whether the file `name` becomes the document's own file when handed over (`saveAs: true`),
+/// given the file the host opened (`None`: the host never sent one). The rule:
+///
+/// - A document file (`.figcraft` or `.json`, [`DOC_EXTS`]'s formats) under a name the host didn't
+///   open — Save As, or a Save of a document the host never sent — is the document's new file:
+///   `true`. Names compare without case.
+/// - A Save of the host's own file under its name is not: `false`.
+/// - Everything else is a copy or export that never becomes the document — rendered images, SVG,
+///   PDF, `.fig` copies, variables — and the variables sidecar counts as one whatever its `.json`
+///   extension says: `false`.
+pub fn save_as(name: &str, host_file: Option<&str>) -> bool {
+    if name.to_ascii_lowercase().ends_with(VARIABLES_SIDECAR) {
+        return false;
+    }
+    let ext = std::path::Path::new(name).extension().and_then(std::ffi::OsStr::to_str);
+    if !ext.is_some_and(|e| DOC_EXTS.iter().any(|x| x.eq_ignore_ascii_case(e))) {
+        return false;
+    }
+    match host_file {
+        Some(host) => !host.eq_ignore_ascii_case(name),
+        None => true,
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn only_the_exact_page_value_opts_in() {
+        assert!(page_host_requested(Some("page")));
+        for off in [None, Some(""), Some("Page"), Some("PAGE"), Some(" page"), Some("page "), Some("parent")] {
+            assert!(!page_host_requested(off), "{off:?} must keep the page host mode off");
+        }
+    }
+
+    #[test]
+    fn open_names_fall_back_to_the_default_when_blank() {
+        assert_eq!(open_name(Some("Poster.figcraft")), "Poster.figcraft");
+        assert_eq!(open_name(Some(" Poster.figcraft ")), " Poster.figcraft ", "a name with its spacing is kept");
+        assert_eq!(open_name(Some("")), DEFAULT_OPEN_NAME);
+        assert_eq!(open_name(Some("   ")), DEFAULT_OPEN_NAME);
+        assert_eq!(open_name(None), DEFAULT_OPEN_NAME);
+    }
+
+    #[test]
+    fn a_save_of_the_host_s_file_is_not_save_as() {
+        assert!(!save_as("Poster.figcraft", Some("Poster.figcraft")));
+        assert!(!save_as("poster.FIGCRAFT", Some("Poster.figcraft")), "names compare without case");
+        assert!(!save_as("design.json", Some("design.json")));
+    }
+
+    #[test]
+    fn a_new_document_file_is_save_as() {
+        assert!(save_as("Poster 2.figcraft", Some("Poster.figcraft")));
+        assert!(save_as("Poster.json", Some("Poster.figcraft")), "the other format a document's file takes");
+        assert!(save_as("Untitled.figcraft", None), "the host never sent a file");
+        assert!(save_as("Poster.figcraft", Some("design.json")), "the opened .json saved as .figcraft is a new file");
+    }
+
+    #[test]
+    fn copies_and_exports_never_become_the_document_s_file() {
+        for name in ["Poster.png", "Poster@2x.jpg", "Poster.svg", "Poster.pdf", "Poster.fig", "Poster.csv", "Poster.variables.css"] {
+            assert!(!save_as(name, Some("Poster.figcraft")), "{name} is a copy");
+            assert!(!save_as(name, None), "{name} is a copy even without a host file");
+        }
+    }
+
+    #[test]
+    fn the_variables_sidecar_is_a_copy_whatever_its_extension() {
+        assert!(!save_as("Poster.variables.json", Some("Poster.figcraft")));
+        assert!(!save_as("Poster.variables.json", None));
+        assert!(!save_as("design.variables.json", Some("design.variables.json")));
+    }
+}
diff --git a/apps/figcraft-web/src/main.rs b/apps/figcraft-web/src/main.rs
index 48e03ba85..b65a82772 100644
--- a/apps/figcraft-web/src/main.rs
+++ b/apps/figcraft-web/src/main.rs
@@ -19,9 +19,17 @@
 //!   server…), but can't host a session. A page served over `https://` reaches only `wss://`
 //!   servers and the same computer (browsers block `ws://` from secure pages); serve it over
 //!   `http://` on a trusted network to reach plain `ws://` hosts on other machines.
+//! - host mode: `?host=parent` (a same-origin page embedding FigCraft in an `<iframe>`) or
+//!   `data-host="page"` on the canvas (the page's own document) hands the page the app's files
+//!   instead of downloading them and reports unsaved changes (`host`);
+//! - live sessions: it joins sessions a desktop app hosts (File ▸ Join live session…) but can't
+//!   host one. A page served over `https://` can only reach sessions on the same computer
 //!
 //! URL query flags: `?webgl` forces the WebGL2 backend instead of WebGPU; `?control` installs
-//! `window.figcraft`, the page's control channel (`api.rs`), which is off without it.
+//! `window.figcraft`, the page's control channel (`api.rs`), which is off without it; `?host=parent`
+//! (inside an `<iframe>`) talks to a same-origin parent page instead: it sends the document to open
+//! and stores what FigCraft saves. `&author=` names the user for comments and board notes in either
+//! host mode.
 //!
 //! URL fragment: `#join=<invite link or join code>` joins that live session once the page has
 //! loaded, so a bookmark opens a shared file. `join` takes the rest of the fragment: put it last.
@@ -30,6 +38,10 @@
 
 #[cfg(target_arch = "wasm32")]
 mod api;
+#[cfg(target_arch = "wasm32")]
+mod host;
+#[cfg(any(target_arch = "wasm32", test))]
+mod hostmode;
 #[cfg(any(target_arch = "wasm32", test))]
 mod kept;
 #[cfg(target_arch = "wasm32")]
diff --git a/apps/figcraft-web/src/web.rs b/apps/figcraft-web/src/web.rs
index ee8cd9487..7878edbe4 100644
--- a/apps/figcraft-web/src/web.rs
+++ b/apps/figcraft-web/src/web.rs
@@ -32,6 +32,21 @@ pub fn start() {
             log::error!("missing <canvas id=\"{CANVAS_ID}\">");
             return;
         };
+        // Host modes: `?host=parent`, a same-origin page framing FigCraft, opens documents in it
+        // and stores what it saves (`host`); unframed there is no parent, so that URL on its own
+        // stays the normal app with downloads. `data-host="page"` on the canvas opts a page in
+        // instead: it runs FigCraft in its own document and talks over DOM `CustomEvent`s on the
+        // canvas (`host`).
+        let bridge = if query_param("host").as_deref() == Some("parent") {
+            crate::host::Bridge::new()
+        } else if crate::hostmode::page_host_requested(canvas.get_attribute("data-host").as_deref()) {
+            Some(crate::host::Bridge::for_page(&canvas))
+        } else {
+            None
+        };
+        let app_bridge = bridge.clone();
+        // Files the host sends, on their way into the app's own open queue each frame.
+        let opens: crate::host::OpenQueue = std::rc::Rc::default();
         let mut options = eframe::WebOptions::default();
         // `?webgl`: force the WebGL2 backend (troubleshooting, and headless browsers whose WebGPU
         // adapter request returns nothing).
@@ -44,7 +59,7 @@ pub fn start() {
             .start(
                 canvas,
                 options,
-                Box::new(|cc| {
+                Box::new(move |cc| {
                     if let Some(rs) = &cc.wgpu_render_state {
                         log::info!("figcraft-web: wgpu backend {:?}", rs.adapter.get_info().backend);
                     }
@@ -64,6 +79,11 @@ pub fn start() {
                     fig.note_recovered(recovered);
                     if let Err(e) = crate::pasted::install(cc.egui_ctx.clone()) {
                         log::error!("couldn't listen for pasted images: {e:?}");
+                    // Host mode: the host sends the file to edit, so start with no document (the
+                    // Live sessions: the browser joins sessions a desktop app hosts; whatever arrives
+                    let mut fig = FigApp::new(session, Box::new(WebServices { reduce_motion, ctx: cc.egui_ctx.clone(), host: app_bridge.clone() }));
+                    // `?author=`: the host's name for the user signs this visit's comments and board
+                        crate::host::Bridge::set_author(&mut fig, &author);
                     }
                     // `#join=<link>`: join that session, as opening an invite link does on the desktop.
                     let hash = web_sys::window().and_then(|w| w.location().hash().ok()).unwrap_or_default();
@@ -78,10 +98,21 @@ pub fn start() {
                             log::error!("couldn't install window.figcraft: {e:?}");
                         }
                     }
-                    Ok(Box::new(WebShell { fig }))
+                    // The host's files arrive on the app's own open path (a dropped file's).
+                    if let Some(bridge) = &app_bridge {
+                        bridge.listen(opens.clone(), cc.egui_ctx.clone());
+                    }
+                    Ok(Box::new(WebShell { fig, host: app_bridge, opens }))
                 }),
             )
             .await;
+        // Ready only once the runner is up: starting can still fail after the app is made.
+        if let Some(bridge) = &bridge {
+            match &result {
+                Ok(()) => bridge.post_ready(),
+                Err(e) => bridge.post_failed(&format!("{e:?}")),
+            }
+        }
         if let Some(el) = document.get_element_by_id(LOADING_ID) {
             match result {
                 Ok(()) => el.remove(),
@@ -141,20 +172,34 @@ fn query() -> String {
     web_sys::window().and_then(|w| w.location().search().ok()).unwrap_or_default()
 }
 
+fn query_param(key: &str) -> Option<String> {
+    web_sys::UrlSearchParams::new_with_str(&query()).ok()?.get(key)
+}
+
 struct WebShell {
     fig: FigApp,
+    /// The host bridge, when the page hosts the app (`?host=parent` or `data-host="page"`).
+    host: Option<crate::host::Bridge>,
+    /// Files the host sent, waiting to join the app's own open queue.
+    opens: crate::host::OpenQueue,
 }
 
 impl eframe::App for WebShell {
     // eframe runs `logic` for visible tabs and, with only `run_logic`, for hidden ones: keep
     // autosave/live/control deadlines moving without a paint. `FigApp::ui` does not repeat it.
-    /// Run the browser shell's eframe logic callback: guard `background_tick` so hidden tabs
-    /// still advance autosave, live and control deadlines without painting. `FigApp::ui` does
+    /// Run the browser shell's eframe logic callback: hand the host's files to the app's open
+    /// queue, guard `background_tick` so hidden tabs still advance autosave, live and control
+    /// deadlines without painting, and report unsaved changes to the host. `FigApp::ui` does
     /// not repeat it.
     fn logic(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
         // Every frame, hidden or not, starts here: what the last one left is what a panic keeps.
         UNSAVED.with(|u| u.try_borrow_mut().map(|mut u| u.follow(&self.fig.session))).ok();
+        // Files the host sent join the app's own open queue (a dropped file's): the same
         figcraft_ui_egui::windows::guard(&mut self.fig, ctx, |fig| fig.background_tick(ctx));
+        // The host hears when unsaved changes appear or go away (crate::host).
+        if let Some(bridge) = &self.host {
+            bridge.set_dirty(self.fig.session.docs.iter().any(|d| d.is_dirty()));
+        }
     }
 
     fn raw_input_hook(&mut self, ctx: &egui::Context, raw_input: &mut egui::RawInput) {
@@ -184,10 +229,13 @@ impl eframe::App for WebShell {
 /// over their contents (pickers that need a path return nothing, the trait's defaults); files are
 /// saved as downloads. Copies go to the system clipboard through egui's output; pastes arrive as
 /// paste events with their text or image (a page can't read the clipboard when it likes).
+/// saved as downloads, or handed to the host page in host mode. Copies go to the system clipboard
 struct WebServices {
     /// `prefers-reduced-motion: reduce` (it follows the setting while the page is open).
     reduce_motion: Option<web_sys::MediaQueryList>,
     ctx: egui::Context,
+    /// The host bridge in host mode: files are handed over instead of downloaded ([`crate::host`]).
+    host: Option<crate::host::Bridge>,
 }
 
 impl Services for WebServices {
@@ -204,11 +252,15 @@ impl Services for WebServices {
     fn downloads(&self) -> bool {
         true
     }
-    /// A Blob behind a temporary `<a download>` link, clicked and removed.
+    /// A Blob behind a temporary `<a download>` link, clicked and removed; in host mode the file
+    /// goes to the host page instead ([`crate::host`]).
     fn download(&mut self, name: &str, bytes: &[u8]) -> bool {
         if crate::api::capture(name, bytes) {
             return true;
         }
+        if let Some(bridge) = &self.host {
+            return bridge.post_save(name, bytes);
+        }
         match download(name, bytes) {
             Ok(()) => true,
             Err(e) => {
diff --git a/packaging/web/README.md b/packaging/web/README.md
index 609cb5da6..10e1ae037 100644
--- a/packaging/web/README.md
+++ b/packaging/web/README.md
@@ -107,6 +107,94 @@ Local test: `python3 -m http.server 8767` inside the folder, then open http://lo
   (`allow-popups` lets Help links open in a new tab).
 - Don't send `X-Frame-Options: DENY` or a `frame-ancestors` CSP that excludes the embedding page.
 
+## Host mode (`?host=parent`, or the page's own document)
+
+A page can embed FigCraft so that it hands files over instead of downloading them and reports
+unsaved changes. Two opt-in transports carry the same messages:
+
+- **`?host=parent`** on the iframe's URL (`https://example.com/figcraft/?host=parent`): a
+  **same-origin** framing page talks to the app over `postMessage`. Opened outside an iframe, the
+  URL gives the normal app with downloads; with a parent on another origin there is no host mode
+  either (messages to another origin are dropped silently, so saves would be lost while the
+  document looked saved).
+- **`data-host="page"`** (the exact value `page`) on the canvas: a page that loads the module into
+  its own document gets the same behaviour over DOM `CustomEvent`s on the canvas, with no iframe
+  (see below).
+
+| Message | Direction | Fields |
+|---|---|---|
+| `figcraft:ready` | app → page | `version`: the app is running and listening; send a file now |
+| `figcraft:open` | page → app | `name`, `bytes` (an `ArrayBuffer` or `Uint8Array`): open like File › Open (a payload over the browser open limit of 512 MB is refused; anything malformed is ignored) |
+| `figcraft:save` | app → page | `name`, `saveAs`, `bytes` (a transferred `ArrayBuffer`): every file the app would otherwise download. The page stores it and reports failures itself. `saveAs` says whether the file becomes the document's file: `false` after Save of the file the page sent, under its own name; `true` for a document file (`.figcraft`, `.json`) under a name the page didn't send — Save As, or a Save of a document the page never sent — after which the next Save carries that name with `false`; `false` for copies and exports that don't become the document (rendered images, SVG, PDF, `.fig` copies, the variables exports) |
+| `figcraft:dirty` | app → page | `dirty`: unsaved changes appeared or went away |
+| `figcraft:failed` | app → page | `error`: the app couldn't start (no WebGPU or WebGL2, for example) |
+
+Files reach the page through the app's download service, the path this web build saves by: Save As
+(and a Save of a document with no file yet), the `.fig` copy, the export panel and its dialog,
+Export frames as PDF, plugin output and the variables export (Variables panel ▸ Export…). In host
+mode each arrives as `figcraft:save` instead of a download.
+
+In host mode the app starts with no document (the home screen), so the page sends the file to edit
+and guards leaving the page while changes are unsaved. `&author=` on the URL names the user for
+comments and board notes.
+
+### Same-document host mode
+
+The host application loads the wasm-bindgen module itself and gives FigCraft one of its own
+canvases, so there is no iframe and no `?host=parent`. It opts in with `data-host="page"` on that
+canvas — the exact value `page` — and the canvas keeps the id the app looks up
+(`id="figcraft_canvas"`):
+
+```html
+<canvas id="figcraft_canvas" data-host="page" style="width: 100%; height: 720px; display: block;"></canvas>
+```
+
+The page and the app then talk with DOM `CustomEvent`s on the canvas instead of `postMessage`. The
+app dispatches the same messages it would post to a parent — `figcraft:ready`, `figcraft:save`,
+`figcraft:dirty`, `figcraft:failed` — with the message fields (without the type) as the event's
+`detail`, and it opens a document when the page dispatches a `figcraft:open` event with
+`detail: { name, bytes }`. Events do not bubble, so listen on the canvas itself (two editors on
+one page can't hear each other).
+
+Add the listeners before `init`: the app announces itself with `figcraft:ready` while `init` is
+still running, and a file sent in reply would otherwise be missed.
+
+```js
+import init from "./figcraft-web-<hash>.js"; // the wasm-bindgen glue shipped with the app
+
+const canvas = document.getElementById("figcraft_canvas");
+
+canvas.addEventListener("figcraft:ready", async () => {
+  // The app is listening; hand it a document now, if you have one.
+  const bytes = await documentBytes(); // an ArrayBuffer or Uint8Array
+  canvas.dispatchEvent(new CustomEvent("figcraft:open", {
+    detail: { name: "Poster.figcraft", bytes },
+  }));
+});
+
+// Every file FigCraft would otherwise download arrives here.
+canvas.addEventListener("figcraft:save", (event) => {
+  const { name, saveAs, bytes } = event.detail; // bytes is an ArrayBuffer
+  // Store the file under `name`; `saveAs` says whether it becomes the document's file.
+  // Report your own errors.
+  storeFile(name, bytes, saveAs);
+});
+canvas.addEventListener("figcraft:dirty", (event) => {
+  unsaved = event.detail.dirty; // warn before leaving, as you like
+});
+canvas.addEventListener("figcraft:failed", (event) => {
+  showError(event.detail.error); // the app couldn't start
+});
+
+await init({ module_or_path: "./figcraft-web-<hash>_bg.wasm" });
+```
+
+- Saves are not downloads in this mode: the `bytes` in `figcraft:save` hold the file, and the host
+  decides where it goes.
+- `?author=` on the page's URL still names the user for comments and board notes.
+- An unframed page that uses `?host=parent` keeps the normal app with downloads; only the exact
+  `data-host` value `page` turns this mode on.
+
 ## Renderer selection and fallback flags
 
 FigCraft renders with wgpu. It uses **WebGPU** when the browser has it and falls back to

From 51bbc2b1a7f19c6fb91acdd0665eec6e83b5062e Mon Sep 17 00:00:00 2001
From: Helen Kwok <107752876+helenkwok@users.noreply.github.com>
Date: Tue, 27 Oct 2026 10:32:30 +1030
Subject: [PATCH 32/41] figcraft-web: a host-opened file is the document's
 file; a failed save hand-over changes nothing

---
 apps/figcraft-web/src/host.rs | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/apps/figcraft-web/src/host.rs b/apps/figcraft-web/src/host.rs
index d08bdf45b..5ed0f683a 100644
--- a/apps/figcraft-web/src/host.rs
+++ b/apps/figcraft-web/src/host.rs
@@ -147,6 +147,7 @@ impl Bridge {
     /// (the shell drains it into [`figcraft_ui_egui::pending_open`] every frame, so a host file
     /// opens like a dropped one).
     pub fn listen(&self, opens: OpenQueue, ctx: egui::Context) {
+        let host_file = self.host_file.clone();
         match &self.transport {
             Transport::Parent { window, parent, origin } => {
                 let parent = parent.clone();
@@ -159,7 +160,7 @@ impl Bridge {
                     if string(&data, "type").as_deref() != Some("figcraft:open") {
                         return;
                     }
-                    deliver_open(&opens, &ctx, &data);
+                    deliver_open(&opens, &ctx, &host_file, &data);
                 });
                 if window.add_event_listener_with_callback("message", on_message.as_ref().unchecked_ref()).is_ok() {
                     // The listener lives as long as the page.
@@ -170,7 +171,7 @@ impl Bridge {
                 let on_open = Closure::<dyn FnMut(web_sys::Event)>::new(move |event: web_sys::Event| {
                     // A plain `Event` of the same name carries no detail; only a `CustomEvent`.
                     let Some(open) = event.dyn_ref::<web_sys::CustomEvent>() else { return };
-                    deliver_open(&opens, &ctx, &open.detail());
+                    deliver_open(&opens, &ctx, &host_file, &open.detail());
                 });
                 if canvas.add_event_listener_with_callback("figcraft:open", on_open.as_ref().unchecked_ref()).is_ok() {
                     // The listener lives as long as the page.
@@ -203,15 +204,16 @@ impl Bridge {
         let name = file_name(path);
         let host_file = self.host_file.borrow().clone();
         let save_as = crate::hostmode::save_as(&name, host_file.as_deref());
-        // After a Save As hand-over the document's file is the new one: the next Save of it sends
-        // its name with `saveAs: false`.
-        if save_as {
-            *self.host_file.borrow_mut() = Some(name.clone());
-        }
         // `figcraft:save` carries the bytes as an `ArrayBuffer`; the parent bridge transfers it.
         let buffer = js_sys::Uint8Array::from(bytes).buffer();
         let fields: [(&str, JsValue); 3] = [("name", name.as_str().into()), ("saveAs", save_as.into()), ("bytes", buffer.clone().into())];
-        self.transport.send("figcraft:save", &fields, Some(&buffer)).is_ok()
+        let sent = self.transport.send("figcraft:save", &fields, Some(&buffer)).is_ok();
+        // After a Save As hand-over the host has the new file: the next Save of it sends its name
+        // with `saveAs: false`. A failed send changes nothing, so a retry is still a Save As.
+        if sent && save_as {
+            *self.host_file.borrow_mut() = Some(name);
+        }
+        sent
     }
 
     /// Report unsaved changes when they appear or go away, not every frame.
@@ -224,9 +226,12 @@ impl Bridge {
 
 /// The file an open message or event carries, queued for the app's own open path, or nothing when
 /// the payload isn't one (no bytes, or over the open limit).
-fn deliver_open(opens: &OpenQueue, ctx: &egui::Context, data: &JsValue) {
+fn deliver_open(opens: &OpenQueue, ctx: &egui::Context, host_file: &RefCell<Option<String>>, data: &JsValue) {
     let name = crate::hostmode::open_name(string(data, "name").as_deref());
     let Some(bytes) = payload_bytes(data, &name) else { return };
+    // The document's file is now the one the host sent: a Save of it under this name is
+    // `saveAs: false`.
+    *host_file.borrow_mut() = Some(name.clone());
     opens.borrow_mut().push((name, bytes));
     ctx.request_repaint();
 }

From e83eeeb925ba6b94830f7c50fd0a3ce27a57099c Mon Sep 17 00:00:00 2001
From: Helen Kwok <107752876+helenkwok@users.noreply.github.com>
Date: Sun, 1 Nov 2026 14:43:04 +0800
Subject: [PATCH 33/41] figcraft-web: carry the host bridge over the current
 startup code (one web-sys entry, one app construction, host files drained
 into the open queue); roadmap header merged

---
 ROADMAP.md                   |  3 +--
 apps/figcraft-web/Cargo.toml |  3 +--
 apps/figcraft-web/src/web.rs | 30 +++++++++++++++++++++++-------
 3 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/ROADMAP.md b/ROADMAP.md
index 2a5fa6fff..c2aa86c22 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -2,8 +2,7 @@
 
 **Stage: alpha** · next: beta, ~26 points and ~162–292 h away (one Opus 5.5 agent; ~33–67 h wall-clock with 5 agents)
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-30 · **Change:** minor (a connector end moved with Cmd/Ctrl held goes on any part of an object, and stays there as the object moves or resizes; a tap on a plugin panel's button keeps what was typed in its fields; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; library analytics list how many layers and files use each style and variable; the Controller menu names each button as PlayStation and Switch controllers do; widgets draw lines and SVG pictures (plugin API 6); a connector end dropped along a side of a shape attaches to that side (#1708); regression tests pin a rounded shape's one-sided stroke and SVG ids and font families without XML-forbidden characters (#1351, #1124); a damaged image is refused with a reason instead of showing as an empty box (#1474); an image copied in another app pastes again on the desktop, and in the browser for the first time (#492); SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the Frame tool's Phone presets have the iPhone 17 family (#1691); Show in folder works in the Flatpak build and selects the file on Linux (#1701); a dashed line starts and ends with a half-length dash, on the canvas and in exports; the Pages, Layers and Assets search fields keep their text in the middle of the field (#1703); a board connector's path can be reshaped by dragging its path handles (#1710); boards have 16 more shapes (arrows, polygons, star, plus and flowchart symbols), in pickers that lay them out in a grid; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a stroke's Custom style takes a dash pattern of any length as a comma-separated list (#1681); a control request can set its own timeout, up to 10 minutes (`timeoutMs`; `figcraft-cli mcp --attach PORT --timeout SECONDS`) (#1696); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the keyboard's Menu key opens the context menu, as Shift+F10 does; an Open link action can open in place of the prototype, with "Open in new tab" off (gap 15); a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; a live session's welcome sends the document compressed to clients that read it, about seven times smaller (#1665); a control request that times out says truthfully whether it was dropped or is still running and will take effect, and only screenshots and input blame the window (#1673); a board keeps earlier votes' results, listed newest first in Results and deleted one at a time; the object a stamp will stick to is outlined while the stamp tool is over it or a stamp is dragged over it, and board objects take no drops (gap 24); a server can list the files shared from it now for everyone who reaches it, Home ▸ Online shows them and their links carry no secret (`team_files`, part of #742); team library analytics count detached instances per component and file (gap 10); skipping the Open link notice by command is saved with the preferences at once (gap 15); a selected connector's bar on a board sets its start and end points, solid or dashed, its weight and any colour (#1596); cells copied from a spreadsheet paste onto a board as a table; a long layer name stays on one line in the Export button and the Dev Mode header, ending with an ellipsis, and no longer covers the Design panel (#1650); with hundreds of layers selected, the Design panel and the selection overlays stop going over the whole selection on every frame, so dragging 648 layers averages about 1.1 ms of UI per frame (#1571); plugin panels show pictures: an `image` control, base64 within 256 KB and 4,096 px a side, named by its label (gap 6); `.fig` connector labels without a saved snapshot are kept, centred on their line (gap 1); a drag moving many layers re-runs only what sits around them, not each layer's bindings, sizing, text and instance checks, on every move (#1571); damaged font tracking table offsets are checked instead of wrapping on 32-bit targets, and font indexing makes its existing offset bounds explicit (#1125); Bosnian (`bs`) draft catalog; text style dedupe is O(spans) via a last-two cache and fingerprint buckets (#1102); pasted layers whose image the clipboard lacks are named and show a placeholder that reads as missing (#1646); paint-style colours on layers pasted from another design app keep their style instead of turning black (#1638); progress docs cleaned of what merges left twice: rows merged into one, repeated status items removed, and `cargo xtask docs` (in `ci`) fails on a repeated table row or status item; a name typed for a variable or collection finds the one with that exact id before one named like it, and stored mode ids, font family variables and the panels' labels read exact ids (#1613); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); `.fig` elbowed and curved connectors without a saved path are routed like board connectors instead of drawn straight (gap 1); every file a command reads whole by path is a regular file within a cap that fits it: documents 16 GiB, placed images 256 MiB, CLI scripts 1 GiB; `figcraft-cli connect publish` publishes a code repository's code connect mappings to a design file (gap 16); while a drag only moves a large selection, its outlines, box, slots, spacing and Design panel values are worked out once and shifted, not rebuilt on every move (#1571); Shift+Cmd/Ctrl+Enter on a selected board shape adds the next shape already joined to it, and goes on typing (#1597); an imported or pasted file finds an installed family under the other names its fonts give it, and with other case and spacing, instead of reporting it missing (#1292); a development example generates figcraft-cli's shell completions and man pages from its clap definitions (part of #1396); `.fig` ZIP image reads share a total byte budget and count skipped images in the import warnings (#1076); German terminology corrections (M10): gradient stops, OpenType stylistic sets and the Home-screen preference; a component set's property rows fit the 240 px right panel: variant values wrap two to a line there and every + and − stays in view; the server key is checked by comparing SHA-256 hashes of the presented and the kept key, as the deployment guide says (#1130); opening a file contacts no team library server it names until you check it (#1097); a hostile server can no longer grow a client's memory with made-up people, and a session remembers a bounded number of deleted layer ids (#1121); `doc.list` gives AI agents and plugins the open files' names, not their paths (#1117); with a large selection, frames where nothing changed reuse the selection's outlines, box and slots and the Design panel's instance and position values instead of working them out again (#1571); team libraries and plugins larger than the 16 MiB download burst can be downloaded again, more slowly (#1089); a batch keeps one undo snapshot, not one per step (#1099); files nested 256 levels deep import on the browser's 1 MB stack (#1101); SVG and PDF exports count pattern sources and the renders they embed from the layer's depth, so one cap bounds a whole export (#1082); an explicit variables file path (`variable.import`, the `variables` of `file.open` and `file.import`) is refused past 256 MiB or when it isn't a regular file, as the sibling `variables.json` already was (part of #1114); joining and leaving a file nobody is editing reads and writes nothing on the server: it stays loaded a minute after everyone leaves (#1074); opening a `.figcraft` file unpacks at most 6 GiB in all (2 GiB in the browser), every area together (#1079); hovering the canvas hit-tests once per pointer move, not on every frame, and moving an auto layout frame no longer lays out its contents again on every move (#1571); `.fig` instance expansion no longer walks variable nodes for every instance or copies every outer override row into each nested instance (#1077); `comment.people` lists names that were only @mentioned, and `comment.next` and `comment.prompt` carry the mentions too (#1415); grid auto-placement looks for free cells a 64-bit word at a time and skips what blocks it, with the same placements (#1083); with the pen out, Enter or a double-click ends the path and edits the vector with the Move tool instead of drawing on (#1430); a recovery copy made while a version is previewed holds the file, not the version shown; a FigJam `.jam` file opens as a board (#1342); the Actions palette offers only commands that run from it, and no second row reading like a menu item: Place image opens the file dialog (#1574); share links can comment: a third access level beside edit and view, whose holder sees the file live and adds, replies to, reacts to and resolves comments but can't change the design; Preferences ▸ Scroll wheel zoom: a mouse wheel zooms the canvas about the pointer and Cmd/Ctrl+wheel scrolls (#1390); `comment.list {mentions}` lists only the threads that @mention a name (#1415); in the browser an internal error that stops the page keeps its unsaved files, which open again on reload (#1123); boolean operations refuse input past their caps, and a boolean group past them draws without its result (#1104); figcraft-cli parses its arguments with clap, following RFC-0012 (#1396); the selection and hover outlines of rounded rectangles and frames follow their corners (#1506); component properties keep the order they were made in when one is renamed, and Make slot asks for the slot's name first (#1536, #1537); the browser build publishes files to a server, so Share ▸ Online and Publish to server work there (#917); the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); SVG import reads `color()` and `color-mix()` colours, with a note and a grey for those it can't (#1550); the portable Windows zip keeps its settings, recovery copies and plugins in `config\` beside the executable, starting with an installed copy's preferences; the window starts on other graphics when its first ones fail before the first frame: Direct3D 12 compiles with FXC and no device compiles wgpu's indirect-validation shaders, then Vulkan, OpenGL and lower requirements on the power-saving GPU (#965, #1438); Thai, Lao, Khmer and Burmese lines break between words (#1219); an AI agent attached over MCP shows where it works (#1416); a manual overlay's position can be dragged on the canvas (#405); one name for live sessions and comments: Preferences ▸ Your name, in the Join dialog too, kept in the browser, and a rename shows at once in the sessions you are in (#1380); requests that change a server's files have a budget per address, the server key's too, and join codes are found by their hash (#1075); the Join dialog shows a join from the click until its file is ready, with Cancel, and a failed join with Try again (#1381); SVG import draws each pattern tile once per scale, within the layer budget (#1080); Vietnamese letters typed with combining marks (decomposed) take one font that has every mark, instead of missing-glyph boxes beside the letter (#1478); comment.list reports each message's @mentions (#1415); mask groups draw only over the area they can paint, and nested isolated layers share one memory budget (#1061); components can't contain their own instances, directly or through other components; `edit.duplicate` returns an id map with `map: true` (#995); the batches kept for reconnecting apps are bounded in bytes by default, and `figcraft-server` takes `max_log_mb` (#1069); MCP and control calls name their document (#998); sibling placement in live sessions searches instead of counting (#1065); an AI agent attached over MCP comments under its own name, with an Agent label (#1414); the instance-swap menus have a search field (#1338); a refused batch's fixes take time linear in the batch (#1063); the connector tool shows the connector it will make while dragging, ends snapping to attach points (#1387); large images on the canvas draw from a smaller copy, so two 16k images no longer lag (#1483); a file's JPEG thumbnail can't crash the home screen (#1491's progressive JPEG check, now shared); `.fig` import: library text styles linked by asset key, and override rows restating a nested level (#1234); `.fig` import keeps the file's saved line breaks while the text and its box are unedited (#1236); Download a missing free font from the Missing fonts window (`font.download`, #754); the web build's wasm back under its 24 MiB gate (#1472); shadows of images with transparent pixels follow their alpha (#1289); Crop image: Object ▸ Crop image, the right-click menu and the image fill row enter crop mode (`image.crop`, #1464); offline Penpot 2.x import/export (#1143); optional batch continue-on-error with per-step outcomes (#1386); the Design panel's sections on one grid (#858); FigJam outer shape outlines and sticky body fallback beside author text (#1341, #1397); images placed at their own size, 2x screenshots in points (#1360); the toolbar on one 32 pt grid, without its Resources button (#1210); M4: zero-length round-capped dashes draw dots; dash expansion uses the existing safety budget; extracted from #1143; Arabic draft catalog; scaled instances keep their scale when their main is rebuilt (#922); .fig embedded images are copied once per blob, not once per hash (#1059); page ruler guides survive save and reopen (#1476); colour picker LCH and OKLCH models; non-ASCII layer names transliterate in code export (#1235); branches in live sessions and branch history entries, gap 17; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; Installed weights of an embedded font family (#1246); `.sketch` import, best effort (Sketch 48 and newer); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, the iteration marks 〱–〵 and the halfwidth parentheses, with behaviour cases for each; Adobe Fonts found on macOS (#298); egui 0.37 hidden-capture deadline contract; Dev Mode measurements kept on the canvas and a read-only layers panel; boards: a board area row and progress entry; community fixes in #507, #510, #529 and #530: auto-save, a text box by dragging, batch step references, removing someone from a live session, Russian and Turkish catalogs reviewed, Czech and Indonesian drafts, the Japanese draft completed, zoom previews, the web clipboard, Alt-drag snapping and Cmd+D repeat, recovery copies, crash and rollback fixes, colour emoji, `.fig` import fixes; earlier changes are in the revision history below) · **Target:** Figma Design (desktop app 126.10.7)
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-26 · **Change:** minor (web host bridge: `?host=parent` in an iframe or `data-host="page"` on the canvas hands a page the app's files instead of downloads and reports unsaved changes, documented in the hosting guide; colour picker LCH and OKLCH models; non-ASCII layer names transliterate in code export (#1235); branches in live sessions and branch history entries, gap 17; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; Installed weights of an embedded font family (#1246); `.sketch` import, best effort (Sketch 48 and newer); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, the iteration marks 〱–〵 and the halfwidth parentheses, with behaviour cases for each; Adobe Fonts found on macOS (#298); egui 0.37 hidden-capture deadline contract; Dev Mode measurements kept on the canvas and a read-only layers panel; boards: a board area row and progress entry; community fixes in #507, #510, #529 and #530: auto-save, a text box by dragging, batch step references, removing someone from a live session, Russian and Turkish catalogs reviewed, Czech and Indonesian drafts, the Japanese draft completed, zoom previews, the web clipboard, Alt-drag snapping and Cmd+D repeat, recovery copies, crash and rollback fixes, colour emoji, `.fig` import fixes; earlier changes are in the revision history below) · **Target:** Figma Design (desktop app 126.10.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-30 · **Change:** minor (web host bridge: `?host=parent` or `data-host="page"` hands a page the app's files, documented in the hosting guide; a connector end moved with Cmd/Ctrl held goes on any part of an object, and stays there as the object moves or resizes; a tap on a plugin panel's button keeps what was typed in its fields; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; library analytics list how many layers and files use each style and variable; the Controller menu names each button as PlayStation and Switch controllers do; widgets draw lines and SVG pictures (plugin API 6); a connector end dropped along a side of a shape attaches to that side (#1708); regression tests pin a rounded shape's one-sided stroke and SVG ids and font families without XML-forbidden characters (#1351, #1124); a damaged image is refused with a reason instead of showing as an empty box (#1474); an image copied in another app pastes again on the desktop, and in the browser for the first time (#492); SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the Frame tool's Phone presets have the iPhone 17 family (#1691); Show in folder works in the Flatpak build and selects the file on Linux (#1701); a dashed line starts and ends with a half-length dash, on the canvas and in exports; the Pages, Layers and Assets search fields keep their text in the middle of the field (#1703); a board connector's path can be reshaped by dragging its path handles (#1710); boards have 16 more shapes (arrows, polygons, star, plus and flowchart symbols), in pickers that lay them out in a grid; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a stroke's Custom style takes a dash pattern of any length as a comma-separated list (#1681); a control request can set its own timeout, up to 10 minutes (`timeoutMs`; `figcraft-cli mcp --attach PORT --timeout SECONDS`) (#1696); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the keyboard's Menu key opens the context menu, as Shift+F10 does; an Open link action can open in place of the prototype, with "Open in new tab" off (gap 15); a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; a live session's welcome sends the document compressed to clients that read it, about seven times smaller (#1665); a control request that times out says truthfully whether it was dropped or is still running and will take effect, and only screenshots and input blame the window (#1673); a board keeps earlier votes' results, listed newest first in Results and deleted one at a time; the object a stamp will stick to is outlined while the stamp tool is over it or a stamp is dragged over it, and board objects take no drops (gap 24); a server can list the files shared from it now for everyone who reaches it, Home ▸ Online shows them and their links carry no secret (`team_files`, part of #742); team library analytics count detached instances per component and file (gap 10); skipping the Open link notice by command is saved with the preferences at once (gap 15); a selected connector's bar on a board sets its start and end points, solid or dashed, its weight and any colour (#1596); cells copied from a spreadsheet paste onto a board as a table; a long layer name stays on one line in the Export button and the Dev Mode header, ending with an ellipsis, and no longer covers the Design panel (#1650); with hundreds of layers selected, the Design panel and the selection overlays stop going over the whole selection on every frame, so dragging 648 layers averages about 1.1 ms of UI per frame (#1571); plugin panels show pictures: an `image` control, base64 within 256 KB and 4,096 px a side, named by its label (gap 6); `.fig` connector labels without a saved snapshot are kept, centred on their line (gap 1); a drag moving many layers re-runs only what sits around them, not each layer's bindings, sizing, text and instance checks, on every move (#1571); damaged font tracking table offsets are checked instead of wrapping on 32-bit targets, and font indexing makes its existing offset bounds explicit (#1125); Bosnian (`bs`) draft catalog; text style dedupe is O(spans) via a last-two cache and fingerprint buckets (#1102); pasted layers whose image the clipboard lacks are named and show a placeholder that reads as missing (#1646); paint-style colours on layers pasted from another design app keep their style instead of turning black (#1638); progress docs cleaned of what merges left twice: rows merged into one, repeated status items removed, and `cargo xtask docs` (in `ci`) fails on a repeated table row or status item; a name typed for a variable or collection finds the one with that exact id before one named like it, and stored mode ids, font family variables and the panels' labels read exact ids (#1613); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); `.fig` elbowed and curved connectors without a saved path are routed like board connectors instead of drawn straight (gap 1); every file a command reads whole by path is a regular file within a cap that fits it: documents 16 GiB, placed images 256 MiB, CLI scripts 1 GiB; `figcraft-cli connect publish` publishes a code repository's code connect mappings to a design file (gap 16); while a drag only moves a large selection, its outlines, box, slots, spacing and Design panel values are worked out once and shifted, not rebuilt on every move (#1571); Shift+Cmd/Ctrl+Enter on a selected board shape adds the next shape already joined to it, and goes on typing (#1597); an imported or pasted file finds an installed family under the other names its fonts give it, and with other case and spacing, instead of reporting it missing (#1292); a development example generates figcraft-cli's shell completions and man pages from its clap definitions (part of #1396); `.fig` ZIP image reads share a total byte budget and count skipped images in the import warnings (#1076); German terminology corrections (M10): gradient stops, OpenType stylistic sets and the Home-screen preference; a component set's property rows fit the 240 px right panel: variant values wrap two to a line there and every + and − stays in view; the server key is checked by comparing SHA-256 hashes of the presented and the kept key, as the deployment guide says (#1130); opening a file contacts no team library server it names until you check it (#1097); a hostile server can no longer grow a client's memory with made-up people, and a session remembers a bounded number of deleted layer ids (#1121); `doc.list` gives AI agents and plugins the open files' names, not their paths (#1117); with a large selection, frames where nothing changed reuse the selection's outlines, box and slots and the Design panel's instance and position values instead of working them out again (#1571); team libraries and plugins larger than the 16 MiB download burst can be downloaded again, more slowly (#1089); a batch keeps one undo snapshot, not one per step (#1099); files nested 256 levels deep import on the browser's 1 MB stack (#1101); SVG and PDF exports count pattern sources and the renders they embed from the layer's depth, so one cap bounds a whole export (#1082); an explicit variables file path (`variable.import`, the `variables` of `file.open` and `file.import`) is refused past 256 MiB or when it isn't a regular file, as the sibling `variables.json` already was (part of #1114); joining and leaving a file nobody is editing reads and writes nothing on the server: it stays loaded a minute after everyone leaves (#1074); opening a `.figcraft` file unpacks at most 6 GiB in all (2 GiB in the browser), every area together (#1079); hovering the canvas hit-tests once per pointer move, not on every frame, and moving an auto layout frame no longer lays out its contents again on every move (#1571); `.fig` instance expansion no longer walks variable nodes for every instance or copies every outer override row into each nested instance (#1077); `comment.people` lists names that were only @mentioned, and `comment.next` and `comment.prompt` carry the mentions too (#1415); grid auto-placement looks for free cells a 64-bit word at a time and skips what blocks it, with the same placements (#1083); with the pen out, Enter or a double-click ends the path and edits the vector with the Move tool instead of drawing on (#1430); a recovery copy made while a version is previewed holds the file, not the version shown; a FigJam `.jam` file opens as a board (#1342); the Actions palette offers only commands that run from it, and no second row reading like a menu item: Place image opens the file dialog (#1574); share links can comment: a third access level beside edit and view, whose holder sees the file live and adds, replies to, reacts to and resolves comments but can't change the design; Preferences ▸ Scroll wheel zoom: a mouse wheel zooms the canvas about the pointer and Cmd/Ctrl+wheel scrolls (#1390); `comment.list {mentions}` lists only the threads that @mention a name (#1415); in the browser an internal error that stops the page keeps its unsaved files, which open again on reload (#1123); boolean operations refuse input past their caps, and a boolean group past them draws without its result (#1104); figcraft-cli parses its arguments with clap, following RFC-0012 (#1396); the selection and hover outlines of rounded rectangles and frames follow their corners (#1506); component properties keep the order they were made in when one is renamed, and Make slot asks for the slot's name first (#1536, #1537); the browser build publishes files to a server, so Share ▸ Online and Publish to server work there (#917); the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); SVG import reads `color()` and `color-mix()` colours, with a note and a grey for those it can't (#1550); the portable Windows zip keeps its settings, recovery copies and plugins in `config\` beside the executable, starting with an installed copy's preferences; the window starts on other graphics when its first ones fail before the first frame: Direct3D 12 compiles with FXC and no device compiles wgpu's indirect-validation shaders, then Vulkan, OpenGL and lower requirements on the power-saving GPU (#965, #1438); Thai, Lao, Khmer and Burmese lines break between words (#1219); an AI agent attached over MCP shows where it works (#1416); a manual overlay's position can be dragged on the canvas (#405); one name for live sessions and comments: Preferences ▸ Your name, in the Join dialog too, kept in the browser, and a rename shows at once in the sessions you are in (#1380); requests that change a server's files have a budget per address, the server key's too, and join codes are found by their hash (#1075); the Join dialog shows a join from the click until its file is ready, with Cancel, and a failed join with Try again (#1381); SVG import draws each pattern tile once per scale, within the layer budget (#1080); Vietnamese letters typed with combining marks (decomposed) take one font that has every mark, instead of missing-glyph boxes beside the letter (#1478); comment.list reports each message's @mentions (#1415); mask groups draw only over the area they can paint, and nested isolated layers share one memory budget (#1061); components can't contain their own instances, directly or through other components; `edit.duplicate` returns an id map with `map: true` (#995); the batches kept for reconnecting apps are bounded in bytes by default, and `figcraft-server` takes `max_log_mb` (#1069); MCP and control calls name their document (#998); sibling placement in live sessions searches instead of counting (#1065); an AI agent attached over MCP comments under its own name, with an Agent label (#1414); the instance-swap menus have a search field (#1338); a refused batch's fixes take time linear in the batch (#1063); the connector tool shows the connector it will make while dragging, ends snapping to attach points (#1387); large images on the canvas draw from a smaller copy, so two 16k images no longer lag (#1483); a file's JPEG thumbnail can't crash the home screen (#1491's progressive JPEG check, now shared); `.fig` import: library text styles linked by asset key, and override rows restating a nested level (#1234); `.fig` import keeps the file's saved line breaks while the text and its box are unedited (#1236); Download a missing free font from the Missing fonts window (`font.download`, #754); the web build's wasm back under its 24 MiB gate (#1472); shadows of images with transparent pixels follow their alpha (#1289); Crop image: Object ▸ Crop image, the right-click menu and the image fill row enter crop mode (`image.crop`, #1464); offline Penpot 2.x import/export (#1143); optional batch continue-on-error with per-step outcomes (#1386); the Design panel's sections on one grid (#858); FigJam outer shape outlines and sticky body fallback beside author text (#1341, #1397); images placed at their own size, 2x screenshots in points (#1360); the toolbar on one 32 pt grid, without its Resources button (#1210); M4: zero-length round-capped dashes draw dots; dash expansion uses the existing safety budget; extracted from #1143; Arabic draft catalog; scaled instances keep their scale when their main is rebuilt (#922); .fig embedded images are copied once per blob, not once per hash (#1059); page ruler guides survive save and reopen (#1476); colour picker LCH and OKLCH models; non-ASCII layer names transliterate in code export (#1235); branches in live sessions and branch history entries, gap 17; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; Installed weights of an embedded font family (#1246); `.sketch` import, best effort (Sketch 48 and newer); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, the iteration marks 〱–〵 and the halfwidth parentheses, with behaviour cases for each; Adobe Fonts found on macOS (#298); egui 0.37 hidden-capture deadline contract; Dev Mode measurements kept on the canvas and a read-only layers panel; boards: a board area row and progress entry; community fixes in #507, #510, #529 and #530: auto-save, a text box by dragging, batch step references, removing someone from a live session, Russian and Turkish catalogs reviewed, Czech and Indonesian drafts, the Japanese draft completed, zoom previews, the web clipboard, Alt-drag snapping and Cmd+D repeat, recovery copies, crash and rollback fixes, colour emoji, `.fig` import fixes; earlier changes are in the revision history below) · **Target:** Figma Design (desktop app 126.10.7)
 
 FigCraft is a clean-room, open-source, pure-Rust reimplementation of the Figma design workflow,
 native on macOS, Windows, Linux and FreeBSD and in the browser, fully drivable by agents through
diff --git a/apps/figcraft-web/Cargo.toml b/apps/figcraft-web/Cargo.toml
index 75f7e312c..15f98bee5 100644
--- a/apps/figcraft-web/Cargo.toml
+++ b/apps/figcraft-web/Cargo.toml
@@ -30,5 +30,4 @@ eframe = { workspace = true, features = ["default_fonts", "wgpu", "accesskit"] }
 wasm-bindgen = "0.2"
 js-sys = "0.3"
 wasm-bindgen-futures = "0.4"
-web-sys = { version = "0.3", features = ["Window", "Document", "Element", "HtmlCanvasElement", "HtmlElement", "HtmlAnchorElement", "Node", "Blob", "BlobPropertyBag", "ClipboardEvent", "DataTransfer", "File", "FileList", "HtmlInputElement", "EventTarget", "Url", "Location", "MediaQueryList", "Navigator", "Gamepad", "GamepadButton", "GamepadMappingType", "Storage"] }
-web-sys = { version = "0.3", features = ["Window", "Document", "Element", "Event", "HtmlCanvasElement", "HtmlElement", "HtmlAnchorElement", "Node", "Blob", "BlobPropertyBag", "File", "FileList", "HtmlInputElement", "EventTarget", "Url", "Location", "MediaQueryList", "Navigator", "Gamepad", "GamepadButton", "GamepadMappingType", "MessageEvent", "UrlSearchParams", "CustomEvent", "CustomEventInit"] }
+web-sys = { version = "0.3", features = ["Window", "Document", "Element", "HtmlCanvasElement", "HtmlElement", "HtmlAnchorElement", "Node", "Blob", "BlobPropertyBag", "ClipboardEvent", "DataTransfer", "File", "FileList", "HtmlInputElement", "EventTarget", "Url", "Location", "MediaQueryList", "Navigator", "Gamepad", "GamepadButton", "GamepadMappingType", "Storage", "Event", "MessageEvent", "UrlSearchParams", "CustomEvent", "CustomEventInit"] }
diff --git a/apps/figcraft-web/src/web.rs b/apps/figcraft-web/src/web.rs
index 7878edbe4..12fb6af5e 100644
--- a/apps/figcraft-web/src/web.rs
+++ b/apps/figcraft-web/src/web.rs
@@ -64,7 +64,10 @@ pub fn start() {
                         log::info!("figcraft-web: wgpu backend {:?}", rs.adapter.get_info().backend);
                     }
                     let reduce_motion = web_sys::window().and_then(|w| w.match_media("(prefers-reduced-motion: reduce)").ok().flatten());
-                    let mut session = Session::new();
+                    // Host mode: the host sends the file to edit, so start with no document (the
+                    // home screen), as the desktop app does without a file; otherwise the session
+                    // starts with one new document.
+                    let mut session = if app_bridge.is_some() { Session::empty() } else { Session::new() };
                     // The host names its own server: the default for sharing, codes and the team list.
                     if let Some(server) = page_meta("figcraft-server").as_deref().and_then(crate::query::page_server) {
                         session.prefs.publish_server = server;
@@ -75,14 +78,16 @@ pub fn start() {
                     // whatever arrives on the socket wakes the page for a frame.
                     let ctx = cc.egui_ctx.clone();
                     session.live.install(Box::new(figcraft_collab_net::NetLink::new(std::sync::Arc::new(move || ctx.request_repaint()))));
-                    let mut fig = FigApp::new(session, Box::new(WebServices { reduce_motion, ctx: cc.egui_ctx.clone() }));
+                    let mut fig = FigApp::new(session, Box::new(WebServices { reduce_motion, ctx: cc.egui_ctx.clone(), host: app_bridge.clone() }));
                     fig.note_recovered(recovered);
                     if let Err(e) = crate::pasted::install(cc.egui_ctx.clone()) {
                         log::error!("couldn't listen for pasted images: {e:?}");
-                    // Host mode: the host sends the file to edit, so start with no document (the
-                    // Live sessions: the browser joins sessions a desktop app hosts; whatever arrives
-                    let mut fig = FigApp::new(session, Box::new(WebServices { reduce_motion, ctx: cc.egui_ctx.clone(), host: app_bridge.clone() }));
+                    }
                     // `?author=`: the host's name for the user signs this visit's comments and board
+                    // notes (nothing is stored in the browser, so nothing needs keeping).
+                    if app_bridge.is_some()
+                        && let Some(author) = query_param("author")
+                    {
                         crate::host::Bridge::set_author(&mut fig, &author);
                     }
                     // `#join=<link>`: join that session, as opening an invite link does on the desktop.
@@ -195,6 +200,17 @@ impl eframe::App for WebShell {
         // Every frame, hidden or not, starts here: what the last one left is what a panic keeps.
         UNSAVED.with(|u| u.try_borrow_mut().map(|mut u| u.follow(&self.fig.session))).ok();
         // Files the host sent join the app's own open queue (a dropped file's): the same
+        // "Opening as a new file" card, and `file.open` with the contents once read.
+        for (name, bytes) in std::mem::take(&mut *self.opens.borrow_mut()) {
+            let read: figcraft_ui_egui::ReadFuture = Box::pin(std::future::ready(Ok(bytes)));
+            self.fig.ui.pending_opens.push(figcraft_ui_egui::pending_open::PendingOpen {
+                label: name.clone(),
+                params: serde_json::json!({ "name": name }),
+                command: "file.open",
+                target: None,
+                read: Some(read),
+            });
+        }
         figcraft_ui_egui::windows::guard(&mut self.fig, ctx, |fig| fig.background_tick(ctx));
         // The host hears when unsaved changes appear or go away (crate::host).
         if let Some(bridge) = &self.host {
@@ -227,9 +243,9 @@ impl eframe::App for WebShell {
 
 /// Browser services. Files are opened and imported through the browser's file picker, which hands
 /// over their contents (pickers that need a path return nothing, the trait's defaults); files are
-/// saved as downloads. Copies go to the system clipboard through egui's output; pastes arrive as
-/// paste events with their text or image (a page can't read the clipboard when it likes).
 /// saved as downloads, or handed to the host page in host mode. Copies go to the system clipboard
+/// through egui's output; pastes arrive as paste events with their text or image (a page can't
+/// read the clipboard when it likes).
 struct WebServices {
     /// `prefers-reduced-motion: reduce` (it follows the setting while the page is open).
     reduce_motion: Option<web_sys::MediaQueryList>,

From 3acb629e19d27c94b8d0ad070649025701e1d416 Mon Sep 17 00:00:00 2001
From: Helen Kwok <107752876+helenkwok@users.noreply.github.com>
Date: Sun, 1 Nov 2026 15:04:09 +0800
Subject: [PATCH 34/41] packaging/web: say that ?host=parent takes precedence
 over data-host="page"

---
 packaging/web/README.md | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packaging/web/README.md b/packaging/web/README.md
index 10e1ae037..a2cd4ac40 100644
--- a/packaging/web/README.md
+++ b/packaging/web/README.md
@@ -192,8 +192,10 @@ await init({ module_or_path: "./figcraft-web-<hash>_bg.wasm" });
 - Saves are not downloads in this mode: the `bytes` in `figcraft:save` hold the file, and the host
   decides where it goes.
 - `?author=` on the page's URL still names the user for comments and board notes.
-- An unframed page that uses `?host=parent` keeps the normal app with downloads; only the exact
-  `data-host` value `page` turns this mode on.
+- An unframed page that uses `?host=parent` keeps the normal app with downloads.
+  `data-host="page"` turns this mode on only when `?host=parent` is absent: if `?host=parent` is
+  present it takes precedence, so a same-origin framed page uses the parent bridge, while an
+  unframed or cross-origin page gets no bridge and keeps normal downloads.
 
 ## Renderer selection and fallback flags
 

From 845e34dfeb833d335846e6b6a98eecaf8c5f216c Mon Sep 17 00:00:00 2001
From: Helen Kwok <107752876+helenkwok@users.noreply.github.com>
Date: Sun, 1 Nov 2026 17:30:54 +0800
Subject: [PATCH 35/41] packaging/web: document what page host mode trusts, the
 limits on host files, and the stable event names

---
 packaging/web/README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packaging/web/README.md b/packaging/web/README.md
index a2cd4ac40..4b501f29e 100644
--- a/packaging/web/README.md
+++ b/packaging/web/README.md
@@ -197,6 +197,12 @@ await init({ module_or_path: "./figcraft-web-<hash>_bg.wasm" });
   present it takes precedence, so a same-origin framed page uses the parent bridge, while an
   unframed or cross-origin page gets no bridge and keeps normal downloads.
 
+### Trust and limits
+
+- **Who is trusted.** In page host mode the page and FigCraft share one document, so any script on the page can drive the app: open files in it and receive what it saves. Use this mode only for a page you control. The iframe mode (`?host=parent`) answers only the parent window, on the page's own origin.
+- **Files from the host are untrusted input.** An opened file goes through the same reading as one picked with File ▸ Open or dropped on the window, with the same format limits; before it is copied into the app's memory, its size is checked against the host open limit (512 MB) and a larger file is refused, and a name is cut to 255 characters.
+- **The event and message names are the interface.** `figcraft:ready`, `figcraft:open`, `figcraft:save`, `figcraft:dirty` and `figcraft:failed`, and the fields they carry (the same as the `?host=parent` messages), stay stable; changing one is a breaking change.
+
 ## Renderer selection and fallback flags
 
 FigCraft renders with wgpu. It uses **WebGPU** when the browser has it and falls back to

From cb9a63807ef9e8716018d6256ce95dff8f3481c0 Mon Sep 17 00:00:00 2001
From: Helen Kwok <107752876+helenkwok@users.noreply.github.com>
Date: Thu, 5 Nov 2026 16:47:23 +0800
Subject: [PATCH 36/41] figcraft-web: speak the host messages through
 craft-web-host

The transports, the message types and the origin checks come from the shared crate (storytold/craft-libs#420); FigCraft keeps what is its own: which saved files become the document, the open size limit and the author.
---
 Cargo.lock                        |  10 ++
 apps/figcraft-web/Cargo.toml      |   2 +
 apps/figcraft-web/src/host.rs     | 244 +++++++-----------------------
 apps/figcraft-web/src/hostmode.rs |  43 ++----
 apps/figcraft-web/src/web.rs      |  18 +--
 packaging/web/README.md           |   4 +-
 6 files changed, 86 insertions(+), 235 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index b9fb98654..36bd121b6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1157,6 +1157,15 @@ dependencies = [
  "zip 9.1.1",
 ]
 
+[[package]]
+name = "craft-web-host"
+version = "0.1.0"
+source = "git+https://github.com/storytold/craft-libs?rev=2e2312ddaf21bc3d85cd3395d0955c7d239306f6#2e2312ddaf21bc3d85cd3395d0955c7d239306f6"
+dependencies = [
+ "wasm-bindgen",
+ "web-sys",
+]
+
 [[package]]
 name = "craft-window"
 version = "0.1.0"
@@ -2121,6 +2130,7 @@ name = "figcraft-web"
 version = "0.15.0"
 dependencies = [
  "base64 0.22.1",
+ "craft-web-host",
  "eframe",
  "egui",
  "figcraft-collab-net",
diff --git a/apps/figcraft-web/Cargo.toml b/apps/figcraft-web/Cargo.toml
index 15f98bee5..7f0b4ded5 100644
--- a/apps/figcraft-web/Cargo.toml
+++ b/apps/figcraft-web/Cargo.toml
@@ -19,6 +19,8 @@ figcraft-format = { workspace = true }
 figcraft-ui-egui = { workspace = true }
 figcraft-collab-net = { workspace = true }
 figcraft-text = { workspace = true }
+# The host messages (storytold/craft-libs): one contract and one bridge for the web builds.
+craft-web-host = { git = "https://github.com/storytold/craft-libs", rev = "2e2312ddaf21bc3d85cd3395d0955c7d239306f6", version = "0.1.0" }
 base64 = { workspace = true }
 egui = { workspace = true }
 log = { workspace = true }
diff --git a/apps/figcraft-web/src/host.rs b/apps/figcraft-web/src/host.rs
index 5ed0f683a..1000c1490 100644
--- a/apps/figcraft-web/src/host.rs
+++ b/apps/figcraft-web/src/host.rs
@@ -1,23 +1,21 @@
 //! Host modes: a page that runs FigCraft (as an `<iframe>`, or in its own document) opens
-//! documents in it and stores what it saves instead of the browser downloading. The same
-//! messages as the other Crafting Apps' bridges.
+//! documents in it and stores what it saves instead of the browser downloading. The messages
+//! and the two transports are `craft-web-host`'s (storytold/craft-libs): the same contract as
+//! the other Craft apps' bridges. This module is FigCraft's part of it.
 //!
-//! ## `?host=parent` — an `<iframe>` (such as a Nextcloud app)
-//!
-//! The framing page and FigCraft talk over `postMessage` between same-origin windows. Messages
-//! are plain objects with a `type`:
-//!
-//! - `figcraft:ready` (to the parent): `{ version }`, sent once the app is running and
-//!   listening; send a file now.
-//! - `figcraft:open` (from the parent): `{ name, bytes }`, bytes an `ArrayBuffer` or
-//!   `Uint8Array`. It opens exactly as a file picked with File › Open or dropped on the window
-//!   would (the app's own open queue, with its "Opening as a new file" card). A payload over the
-//!   browser's own open limit ([`figcraft_ui_egui::browser_can_read`]'s 512 MB) is refused before
-//!   its bytes are copied, and anything malformed is ignored.
-//! - `figcraft:save` (to the parent): `{ name, saveAs, bytes }` (a transferred `ArrayBuffer`) for
-//!   every file the app hands its download service — in host mode nothing reaches the browser's
-//!   downloads. The parent stores it and reports failures itself. `saveAs` says whether the file
-//!   becomes the document's file ([`crate::hostmode::save_as`]):
+//! - `?host=parent` (an `<iframe>`, such as a Nextcloud app) talks to the same-origin parent over
+//!   `postMessage`; `data-host="page"` on the canvas (the page's own document) uses DOM
+//!   `CustomEvent`s on the canvas instead. `?host=parent` wins when both are present.
+//! - `figcraft:ready` (to the host) once the app is running and listening; send a file now.
+//! - `figcraft:open` (from the host): `{ name, bytes }`. It opens exactly as a file picked with
+//!   File › Open or dropped on the window would (the app's own open queue, with its "Opening as
+//!   a new file" card). A payload over the browser's own open limit
+//!   ([`figcraft_ui_egui::browser_can_read`]'s 512 MB) is refused before its bytes are copied,
+//!   and anything malformed is ignored. FigCraft reads whole files, so it says `file: false` in
+//!   `ready` and a host sends `bytes`.
+//! - `figcraft:save` (to the host): `{ name, saveAs, bytes }` for every file the app hands its
+//!   download service; in host mode nothing reaches the browser's downloads. `saveAs` says whether
+//!   the file becomes the document's file ([`crate::hostmode::save_as`]):
 //!   - A Save of the file the host opened, under its own name: `false`.
 //!   - A document file (`.figcraft` or `.json`, the formats `file.save` and `file.saveAs` write)
 //!     under a name the host didn't open — Save As, or a Save of a document the host never sent
@@ -26,31 +24,20 @@
 //!   - Everything else is a copy or export that never becomes the document: `false` — rendered
 //!     images, SVG and PDF, `.fig` copies, and the variables exports (a `.variables.json`
 //!     sidecar's `.json` extension doesn't make it a document).
-//! - `figcraft:dirty` (to the parent): `{ dirty }` whenever unsaved changes appear or go away.
-//! - `figcraft:failed` (to the parent): `{ error }` when the app couldn't start.
-//!
-//! Only the parent window on the page's own origin is heard or answered.
-//!
-//! ## `data-host="page"` — the page's own document
-//!
-//! A page that loads the module into its own document (its own `<canvas id="figcraft_canvas"
-//! data-host="page">`, no iframe) gets the same behaviour over DOM `CustomEvent`s on the canvas
-//! instead of `postMessage`: the same four events outward (`ready`, `save`, `dirty`, `failed`,
-//! with the message fields as the event's `detail`), and the page dispatches `figcraft:open` on
-//! the canvas with `detail: { name, bytes }` to open a document. Events don't bubble, so two
-//! editors on one page can't hear each other, and the canvas is the only target FigCraft
-//! listens on.
+//! - `figcraft:dirty` whenever unsaved changes appear or go away, `figcraft:failed` when the app
+//!   couldn't start.
 //!
 //! In host mode the app starts with no document (the home screen) and the host sends the file to
 //! edit; `?author=` names the user for comments and board notes.
 
-use std::cell::{Cell, RefCell};
+use std::cell::RefCell;
 use std::rc::Rc;
 
+use craft_web_host::web::{FileData, Host, Message};
 use figcraft_ui_egui::FigApp;
-use wasm_bindgen::JsCast as _;
-use wasm_bindgen::JsValue;
-use wasm_bindgen::closure::Closure;
+
+/// The app id in the host messages (`figcraft:ready`).
+const APP: &str = "figcraft";
 
 /// The longest user name taken from `?author=`.
 const MAX_AUTHOR_CHARS: usize = 200;
@@ -59,88 +46,20 @@ const MAX_AUTHOR_CHARS: usize = 200;
 /// `(name, bytes)`.
 pub type OpenQueue = Rc<RefCell<Vec<(String, Vec<u8>)>>>;
 
-/// How a host page is reached. The modes behave the same; they differ only in how an event goes
-/// out ([`Transport::send`]) and how an open request comes in ([`Bridge::listen`]).
-#[derive(Clone)]
-enum Transport {
-    /// `?host=parent`: `postMessage` between same-origin windows.
-    Parent { window: web_sys::Window, parent: web_sys::Window, origin: String },
-    /// `data-host="page"`: DOM `CustomEvent`s on the editor's own canvas.
-    Page { canvas: web_sys::HtmlCanvasElement },
-}
-
-impl Transport {
-    /// Hand an event to the host. In parent mode this is a `postMessage` whose object carries a
-    /// `type` field; in page mode a `CustomEvent` of that name on the canvas, whose `detail`
-    /// holds the fields and which never bubbles (two editors on one page must not hear each
-    /// other). `transfer` hands an `ArrayBuffer` to the parent instead of copying it (parent
-    /// mode only; the page's document already shares the buffer's bytes).
-    fn send(&self, event: &str, fields: &[(&str, JsValue)], transfer: Option<&js_sys::ArrayBuffer>) -> Result<(), String> {
-        match self {
-            Transport::Parent { parent, origin, .. } => {
-                let mut message_fields = Vec::with_capacity(fields.len() + 1);
-                message_fields.push(("type", JsValue::from_str(event)));
-                message_fields.extend_from_slice(fields);
-                let message = message(&message_fields).ok_or_else(|| "couldn't build the message".to_string())?;
-                let sent = match transfer {
-                    Some(buffer) => parent.post_message_with_transfer(&message, origin, &js_sys::Array::of1(buffer)),
-                    None => parent.post_message(&message, origin),
-                };
-                sent.map_err(|e| js_error(&e, "couldn't post the message"))
-            }
-            Transport::Page { canvas } => {
-                let detail = message(fields).ok_or_else(|| "couldn't build the event detail".to_string())?;
-                let init = web_sys::CustomEventInit::new();
-                // The builder methods (`bubbles(..)`, `detail(..)`) are deprecated in web-sys
-                // 0.3.106 and fail clippy -D warnings; use the setters.
-                init.set_bubbles(false);
-                init.set_detail(&detail);
-                let custom = web_sys::CustomEvent::new_with_event_init_dict(event, &init).map_err(|e| js_error(&e, "couldn't create the event"))?;
-                // A listener calling `preventDefault` would be the bool; not a send failure.
-                canvas.dispatch_event(&custom).map_err(|e| js_error(&e, "couldn't dispatch the event"))?;
-                Ok(())
-            }
-        }
-    }
-}
-
 #[derive(Clone)]
 pub struct Bridge {
-    transport: Transport,
+    host: Rc<Host>,
     /// The file the host opened, and after a `saveAs` hand-over the document's file: the name a
     /// Save under (`saveAs: false`) is decided against.
     host_file: Rc<RefCell<Option<String>>>,
-    /// The unsaved-changes state last reported to the host.
-    reported: Rc<Cell<Option<bool>>>,
 }
 
 impl Bridge {
-    /// The parent bridge for `?host=parent`. `None` when the page isn't framed (there is no
-    /// parent to talk to), so opening that URL directly stays the normal app with downloads, or
-    /// when the parent is on another origin: messages only go to this origin, so the browser
-    /// would drop every save without an error while the document showed as saved.
-    pub fn new() -> Option<Self> {
-        let window = web_sys::window()?;
-        let parent = window.parent().ok().flatten()?;
-        if js_sys::Object::is(&parent, &window) {
-            return None;
-        }
-        let origin = window.location().origin().ok()?;
-        // An opaque origin (a `file://` page in some browsers) can't be a `postMessage` target.
-        if origin == "null" {
-            return None;
-        }
-        // Reading another origin's location throws, which is `None` too.
-        if parent.location().origin().ok()? != origin {
-            return None;
-        }
-        Some(Self { transport: Transport::Parent { window, parent, origin }, host_file: Rc::default(), reported: Rc::default() })
-    }
-
-    /// The page bridge for `data-host="page"`: the host page runs FigCraft in its own document
-    /// and hears the editor's DOM `CustomEvent`s on this canvas.
-    pub fn for_page(canvas: &web_sys::HtmlCanvasElement) -> Self {
-        Self { transport: Transport::Page { canvas: canvas.clone() }, host_file: Rc::default(), reported: Rc::default() }
+    /// The bridge for this page, or `None` when FigCraft isn't hosted: no `?host=parent` and no
+    /// `data-host="page"` on the canvas, an unframed `?host=parent` page (it stays the normal app
+    /// with downloads), or a parent on another origin.
+    pub fn connect(canvas: &web_sys::HtmlCanvasElement) -> Option<Self> {
+        Some(Self { host: Rc::new(Host::connect(APP, canvas)?), host_file: Rc::default() })
     }
 
     /// Hear the files the host sends, and queue each one on `opens` for the app's own open path
@@ -148,37 +67,11 @@ impl Bridge {
     /// opens like a dropped one).
     pub fn listen(&self, opens: OpenQueue, ctx: egui::Context) {
         let host_file = self.host_file.clone();
-        match &self.transport {
-            Transport::Parent { window, parent, origin } => {
-                let parent = parent.clone();
-                let origin = origin.clone();
-                let on_message = Closure::<dyn FnMut(web_sys::MessageEvent)>::new(move |event: web_sys::MessageEvent| {
-                    if event.origin() != origin || !event.source().is_some_and(|s| js_sys::Object::is(&s, &parent)) {
-                        return;
-                    }
-                    let data = event.data();
-                    if string(&data, "type").as_deref() != Some("figcraft:open") {
-                        return;
-                    }
-                    deliver_open(&opens, &ctx, &host_file, &data);
-                });
-                if window.add_event_listener_with_callback("message", on_message.as_ref().unchecked_ref()).is_ok() {
-                    // The listener lives as long as the page.
-                    on_message.forget();
-                }
+        self.host.listen(move |message| {
+            if let Message::Open { name, data } = message {
+                deliver_open(&opens, &ctx, &host_file, &name, &data);
             }
-            Transport::Page { canvas } => {
-                let on_open = Closure::<dyn FnMut(web_sys::Event)>::new(move |event: web_sys::Event| {
-                    // A plain `Event` of the same name carries no detail; only a `CustomEvent`.
-                    let Some(open) = event.dyn_ref::<web_sys::CustomEvent>() else { return };
-                    deliver_open(&opens, &ctx, &host_file, &open.detail());
-                });
-                if canvas.add_event_listener_with_callback("figcraft:open", on_open.as_ref().unchecked_ref()).is_ok() {
-                    // The listener lives as long as the page.
-                    on_open.forget();
-                }
-            }
-        }
+        });
     }
 
     /// `?author=`: the host's name for the user signs comments and board notes.
@@ -190,12 +83,12 @@ impl Bridge {
     }
 
     pub fn post_ready(&self) {
-        let _ = self.transport.send("figcraft:ready", &[("version", env!("CARGO_PKG_VERSION").into())], None);
+        let _ = self.host.post_ready(env!("CARGO_PKG_VERSION"), false);
     }
 
     /// The app couldn't start (no WebGPU or WebGL2, for example): let the host say so.
     pub fn post_failed(&self, error: &str) {
-        let _ = self.transport.send("figcraft:failed", &[("error", error.into())], None);
+        let _ = self.host.post_failed(error, None);
     }
 
     /// Hand a file the app would otherwise download to the host; `false` when nothing was
@@ -204,10 +97,7 @@ impl Bridge {
         let name = file_name(path);
         let host_file = self.host_file.borrow().clone();
         let save_as = crate::hostmode::save_as(&name, host_file.as_deref());
-        // `figcraft:save` carries the bytes as an `ArrayBuffer`; the parent bridge transfers it.
-        let buffer = js_sys::Uint8Array::from(bytes).buffer();
-        let fields: [(&str, JsValue); 3] = [("name", name.as_str().into()), ("saveAs", save_as.into()), ("bytes", buffer.clone().into())];
-        let sent = self.transport.send("figcraft:save", &fields, Some(&buffer)).is_ok();
+        let sent = self.host.post_save(&name, bytes, None, save_as).is_ok();
         // After a Save As hand-over the host has the new file: the next Save of it sends its name
         // with `saveAs: false`. A failed send changes nothing, so a retry is still a Save As.
         if sent && save_as {
@@ -216,63 +106,33 @@ impl Bridge {
         sent
     }
 
-    /// Report unsaved changes when they appear or go away, not every frame.
+    /// Report unsaved changes when they appear or go away, not every frame (the crate does not
+    /// repeat a state it already reported).
     pub fn set_dirty(&self, dirty: bool) {
-        if self.reported.get() != Some(dirty) && self.transport.send("figcraft:dirty", &[("dirty", dirty.into())], None).is_ok() {
-            self.reported.set(Some(dirty));
-        }
+        self.host.post_dirty(dirty);
     }
 }
 
-/// The file an open message or event carries, queued for the app's own open path, or nothing when
-/// the payload isn't one (no bytes, or over the open limit).
-fn deliver_open(opens: &OpenQueue, ctx: &egui::Context, host_file: &RefCell<Option<String>>, data: &JsValue) {
-    let name = crate::hostmode::open_name(string(data, "name").as_deref());
-    let Some(bytes) = payload_bytes(data, &name) else { return };
+/// The file an open message carries, queued for the app's own open path, or nothing when the
+/// payload isn't one (a `File` the app doesn't read, or over the open limit).
+fn deliver_open(opens: &OpenQueue, ctx: &egui::Context, host_file: &RefCell<Option<String>>, name: &str, data: &FileData) {
+    let name = crate::hostmode::open_name(name);
+    let FileData::Bytes(array) = data else {
+        log::warn!("host file {name} came as a File; FigCraft reads bytes only; not opened");
+        return;
+    };
+    if figcraft_ui_egui::browser_can_read(&name, data.size()).is_err() {
+        log::warn!("host file {name} is too large to open in the browser; not opened");
+        return;
+    }
     // The document's file is now the one the host sent: a Save of it under this name is
     // `saveAs: false`.
     *host_file.borrow_mut() = Some(name.clone());
-    opens.borrow_mut().push((name, bytes));
+    opens.borrow_mut().push((name, array.to_vec()));
     ctx.request_repaint();
 }
 
-/// The `bytes` of an open message or event as owned bytes, refused over the browser's own open
-/// limit ([`figcraft_ui_egui::browser_can_read`]) before they are copied. `bytes` is an
-/// `ArrayBuffer` or `Uint8Array`.
-fn payload_bytes(data: &JsValue, name: &str) -> Option<Vec<u8>> {
-    let bytes = js_sys::Reflect::get(data, &JsValue::from_str("bytes")).ok()?;
-    let len = if let Some(array) = bytes.dyn_ref::<js_sys::Uint8Array>() {
-        array.length() as f64
-    } else {
-        bytes.dyn_ref::<js_sys::ArrayBuffer>()?.byte_length() as f64
-    };
-    if figcraft_ui_egui::browser_can_read(name, len).is_err() {
-        log::warn!("host file {name} is too large to open in the browser; not opened");
-        return None;
-    }
-    Some(if let Some(array) = bytes.dyn_ref::<js_sys::Uint8Array>() { array.to_vec() } else { js_sys::Uint8Array::new(&bytes).to_vec() })
-}
-
 /// The last component of `path`, or the whole of it when there is none.
 fn file_name(path: &str) -> String {
     std::path::Path::new(path).file_name().map(|n| n.to_string_lossy().to_string()).unwrap_or_else(|| path.to_string())
 }
-
-/// A message object or `CustomEvent` detail with the given fields, or `None` if one couldn't be
-/// built (a field that isn't a valid property name, say).
-fn message(fields: &[(&str, JsValue)]) -> Option<js_sys::Object> {
-    let m = js_sys::Object::new();
-    for (key, value) in fields {
-        js_sys::Reflect::set(&m, &JsValue::from_str(key), value).ok()?;
-    }
-    Some(m)
-}
-
-fn string(data: &JsValue, key: &str) -> Option<String> {
-    js_sys::Reflect::get(data, &JsValue::from_str(key)).ok()?.as_string()
-}
-
-/// A `JsValue` error as a string, after `what` went wrong.
-fn js_error(e: &JsValue, what: &str) -> String {
-    format!("{what}: {}", e.as_string().unwrap_or_else(|| format!("{e:?}")))
-}
diff --git a/apps/figcraft-web/src/hostmode.rs b/apps/figcraft-web/src/hostmode.rs
index 54cfbcbc2..a06c745f4 100644
--- a/apps/figcraft-web/src/hostmode.rs
+++ b/apps/figcraft-web/src/hostmode.rs
@@ -1,10 +1,6 @@
 //! Pure host-mode rules, shared by the bridge ([`crate::host`]) and testable without a browser
-//! (like [`crate::query`]): what opts a page into hosting FigCraft in its own document, the name
-//! the bridge fills in when an open request has none, and whether a handed-over file becomes the
-//! document's file.
-
-/// The one `data-host` value that opts a page in: the exact string `"page"`.
-pub const PAGE_HOST: &str = "page";
+//! (like [`crate::query`]): the name the bridge fills in when an open request has none, and whether
+//! a handed-over file becomes the document's file. Which pages host the app is `craft-web-host`'s.
 
 /// The file name used when an open request carries no usable one.
 pub const DEFAULT_OPEN_NAME: &str = "Untitled.figcraft";
@@ -19,17 +15,14 @@ const DOC_EXTS: &[&str] = &["figcraft", "json"];
 /// document, so its extension alone can't tell the `saveAs` decision.
 const VARIABLES_SIDECAR: &str = ".variables.json";
 
-/// Does this `data-host` value ask for page host mode? Only the exact value [`PAGE_HOST`] counts;
-/// anything else is ignored, so the page host mode stays opt-in. `?host=parent`, the parent
-/// bridge's URL opt-in, is answered before this is asked.
-pub fn page_host_requested(data_host: Option<&str>) -> bool {
-    data_host == Some(PAGE_HOST)
-}
+/// The name `craft-web-host` gives an open request that carries no usable one (it cleans a host's
+/// name and falls back to this).
+const NAMELESS: &str = "document";
 
-/// A usable file name for an open request: the host's name when it isn't blank, else the
-/// [`DEFAULT_OPEN_NAME`].
-pub fn open_name(name: Option<&str>) -> String {
-    name.filter(|n| !n.trim().is_empty()).unwrap_or(DEFAULT_OPEN_NAME).to_string()
+/// A usable file name for an open request: the cleaned name the crate hands over, or
+/// [`DEFAULT_OPEN_NAME`] when the host sent none.
+pub fn open_name(name: &str) -> String {
+    if name == NAMELESS { DEFAULT_OPEN_NAME.to_string() } else { name.to_string() }
 }
 
 /// Whether the file `name` becomes the document's own file when handed over (`saveAs: true`),
@@ -61,20 +54,10 @@ mod tests {
     use super::*;
 
     #[test]
-    fn only_the_exact_page_value_opts_in() {
-        assert!(page_host_requested(Some("page")));
-        for off in [None, Some(""), Some("Page"), Some("PAGE"), Some(" page"), Some("page "), Some("parent")] {
-            assert!(!page_host_requested(off), "{off:?} must keep the page host mode off");
-        }
-    }
-
-    #[test]
-    fn open_names_fall_back_to_the_default_when_blank() {
-        assert_eq!(open_name(Some("Poster.figcraft")), "Poster.figcraft");
-        assert_eq!(open_name(Some(" Poster.figcraft ")), " Poster.figcraft ", "a name with its spacing is kept");
-        assert_eq!(open_name(Some("")), DEFAULT_OPEN_NAME);
-        assert_eq!(open_name(Some("   ")), DEFAULT_OPEN_NAME);
-        assert_eq!(open_name(None), DEFAULT_OPEN_NAME);
+    fn open_names_fall_back_to_the_default_when_the_host_sent_none() {
+        assert_eq!(open_name("Poster.figcraft"), "Poster.figcraft");
+        assert_eq!(open_name("Poster 2.json"), "Poster 2.json");
+        assert_eq!(open_name("document"), DEFAULT_OPEN_NAME, "what the crate says for a missing or blank name");
     }
 
     #[test]
diff --git a/apps/figcraft-web/src/web.rs b/apps/figcraft-web/src/web.rs
index 12fb6af5e..69042ce06 100644
--- a/apps/figcraft-web/src/web.rs
+++ b/apps/figcraft-web/src/web.rs
@@ -32,18 +32,12 @@ pub fn start() {
             log::error!("missing <canvas id=\"{CANVAS_ID}\">");
             return;
         };
-        // Host modes: `?host=parent`, a same-origin page framing FigCraft, opens documents in it
-        // and stores what it saves (`host`); unframed there is no parent, so that URL on its own
-        // stays the normal app with downloads. `data-host="page"` on the canvas opts a page in
-        // instead: it runs FigCraft in its own document and talks over DOM `CustomEvent`s on the
-        // canvas (`host`).
-        let bridge = if query_param("host").as_deref() == Some("parent") {
-            crate::host::Bridge::new()
-        } else if crate::hostmode::page_host_requested(canvas.get_attribute("data-host").as_deref()) {
-            Some(crate::host::Bridge::for_page(&canvas))
-        } else {
-            None
-        };
+        // Host modes (`craft-web-host`): `?host=parent`, a same-origin page framing FigCraft, opens
+        // documents in it and stores what it saves (`host`); unframed there is no parent, so that URL
+        // on its own stays the normal app with downloads. `data-host="page"` on the canvas opts a
+        // page in instead: it runs FigCraft in its own document and talks over DOM `CustomEvent`s on
+        // the canvas.
+        let bridge = crate::host::Bridge::connect(&canvas);
         let app_bridge = bridge.clone();
         // Files the host sends, on their way into the app's own open queue each frame.
         let opens: crate::host::OpenQueue = std::rc::Rc::default();
diff --git a/packaging/web/README.md b/packaging/web/README.md
index 4b501f29e..b5b702941 100644
--- a/packaging/web/README.md
+++ b/packaging/web/README.md
@@ -123,7 +123,7 @@ unsaved changes. Two opt-in transports carry the same messages:
 
 | Message | Direction | Fields |
 |---|---|---|
-| `figcraft:ready` | app → page | `version`: the app is running and listening; send a file now |
+| `figcraft:ready` | app → page | `version`, `appVersion`: the app is running and listening; send a file now |
 | `figcraft:open` | page → app | `name`, `bytes` (an `ArrayBuffer` or `Uint8Array`): open like File › Open (a payload over the browser open limit of 512 MB is refused; anything malformed is ignored) |
 | `figcraft:save` | app → page | `name`, `saveAs`, `bytes` (a transferred `ArrayBuffer`): every file the app would otherwise download. The page stores it and reports failures itself. `saveAs` says whether the file becomes the document's file: `false` after Save of the file the page sent, under its own name; `true` for a document file (`.figcraft`, `.json`) under a name the page didn't send — Save As, or a Save of a document the page never sent — after which the next Save carries that name with `false`; `false` for copies and exports that don't become the document (rendered images, SVG, PDF, `.fig` copies, the variables exports) |
 | `figcraft:dirty` | app → page | `dirty`: unsaved changes appeared or went away |
@@ -197,6 +197,8 @@ await init({ module_or_path: "./figcraft-web-<hash>_bg.wasm" });
   present it takes precedence, so a same-origin framed page uses the parent bridge, while an
   unframed or cross-origin page gets no bridge and keeps normal downloads.
 
+The messages and both transports are the shared contract of [`craft-web-host`](https://github.com/storytold/craft-libs/tree/main/crates/web-host) (storytold/craft-libs#420), the same for every Craft app: its README lists every message, including `saved`, with the compatibility notes. In `figcraft:ready`, `version` is the contract's (`"1"`) and `appVersion` is this app's release. FigCraft reads bytes, so a host sends `bytes`, not a `File`.
+
 ### Trust and limits
 
 - **Who is trusted.** In page host mode the page and FigCraft share one document, so any script on the page can drive the app: open files in it and receive what it saves. Use this mode only for a page you control. The iframe mode (`?host=parent`) answers only the parent window, on the page's own origin.

From 05db36303f60a02edced55c1542ede373ad7556b Mon Sep 17 00:00:00 2001
From: Helen Kwok <107752876+helenkwok@users.noreply.github.com>
Date: Sun, 1 Nov 2026 20:43:17 +0800
Subject: [PATCH 37/41] figcraft-web: a Save of a host-opened document goes out
 under the host's file name

In page host mode a plain Save of a .figcraft the host opened used the document's internal name, so the host got a different file name with saveAs true instead of an update to the file it opened. Services gains host_file(); Save uses it for a .figcraft host file, Save As keeps the document name, and a missing, .json or .fig host file stays a Save As.
---
 apps/figcraft-web/src/host.rs         |  5 +++
 apps/figcraft-web/src/web.rs          |  3 ++
 crates/ui-egui/src/app/files.rs       | 26 +++++++++---
 crates/ui-egui/src/host_save_tests.rs | 60 +++++++++++++++++++++++++++
 crates/ui-egui/src/lib.rs             |  2 +
 crates/ui-egui/src/services.rs        |  5 +++
 6 files changed, 95 insertions(+), 6 deletions(-)
 create mode 100644 crates/ui-egui/src/host_save_tests.rs

diff --git a/apps/figcraft-web/src/host.rs b/apps/figcraft-web/src/host.rs
index 1000c1490..57b67ca85 100644
--- a/apps/figcraft-web/src/host.rs
+++ b/apps/figcraft-web/src/host.rs
@@ -91,6 +91,11 @@ impl Bridge {
         let _ = self.host.post_failed(error, None);
     }
 
+    /// The document file the host opened or the last Save As made, if any.
+    pub fn host_file(&self) -> Option<String> {
+        self.host_file.borrow().clone()
+    }
+
     /// Hand a file the app would otherwise download to the host; `false` when nothing was
     /// delivered. The `saveAs` rule is this module's documentation's.
     pub fn post_save(&self, path: &str, bytes: &[u8]) -> bool {
diff --git a/apps/figcraft-web/src/web.rs b/apps/figcraft-web/src/web.rs
index 69042ce06..7da9f8c93 100644
--- a/apps/figcraft-web/src/web.rs
+++ b/apps/figcraft-web/src/web.rs
@@ -279,6 +279,9 @@ impl Services for WebServices {
             }
         }
     }
+    fn host_file(&self) -> Option<String> {
+        self.host.as_ref()?.host_file()
+    }
     fn clipboard_set_text(&mut self, s: &str) {
         figcraft_ui_egui::egui_copy_text(&self.ctx, s);
     }
diff --git a/crates/ui-egui/src/app/files.rs b/crates/ui-egui/src/app/files.rs
index 3351329fd..1ae5e5679 100644
--- a/crates/ui-egui/src/app/files.rs
+++ b/crates/ui-egui/src/app/files.rs
@@ -6,12 +6,7 @@ use super::{
 impl FigApp {
     pub fn save_as_dialog(&mut self) {
         if self.services.downloads() {
-            if let Some(r) = self.run("file.saveAs", json!({"data": true}))
-                && self.download(r["name"].as_str().unwrap_or_default(), &r)
-            {
-                self.run("file.markSaved", json!({}));
-                dialogs::file_saved(self, &r);
-            }
+            self.save_download(None);
             return;
         }
         let Ok(name) = self.session.doc().map(|d| d.name.clone()) else { return };
@@ -43,6 +38,17 @@ impl FigApp {
         });
     }
 
+    /// Save by handing the file over as a download. `keep`: the name a Save of a host-opened
+    /// document keeps; `None` is a Save As, under the document's own name.
+    fn save_download(&mut self, keep: Option<&str>) {
+        if let Some(r) = self.run("file.saveAs", json!({"data": true}))
+            && self.download(keep.unwrap_or_else(|| r["name"].as_str().unwrap_or_default()), &r)
+        {
+            self.run("file.markSaved", json!({}));
+            dialogs::file_saved(self, &r);
+        }
+    }
+
     pub fn save(&mut self) {
         // A branch tab saves its main file.
         let tab = figcraft_engine::branches::file_tab(&self.session);
@@ -57,6 +63,9 @@ impl FigApp {
             if self.run("file.save", json!({})).is_some() {
                 self.toast(i18n::tr("Saved"));
             }
+        } else if let Some(name) = self.services.host_file().filter(|n| is_document_file(n)) {
+            // A host-opened document is saved as the file the host gave: the host updates that file.
+            self.save_download(Some(&name));
         } else {
             self.save_as_dialog();
         }
@@ -299,3 +308,8 @@ impl FigApp {
         failed
     }
 }
+
+/// A `.figcraft` file name: the document format a Save writes (a `.fig` is an export copy).
+fn is_document_file(name: &str) -> bool {
+    Path::new(name).extension().and_then(OsStr::to_str).is_some_and(|e| e.eq_ignore_ascii_case("figcraft"))
+}
diff --git a/crates/ui-egui/src/host_save_tests.rs b/crates/ui-egui/src/host_save_tests.rs
new file mode 100644
index 000000000..0e84d8ab5
--- /dev/null
+++ b/crates/ui-egui/src/host_save_tests.rs
@@ -0,0 +1,60 @@
+//! In a page host the browser hands files to the host: a Save of the document the host opened goes
+//! out under the host's file name, a Save As under the document's own name.
+
+use std::sync::{Arc, Mutex};
+
+use figcraft_engine::Session;
+use serde_json::json;
+
+use crate::{FigApp, Services};
+
+type Saved = Arc<Mutex<Vec<String>>>;
+
+/// Services that save by downloads, with a document file the host opened.
+struct Host {
+    got: Saved,
+    file: Option<&'static str>,
+}
+
+impl Services for Host {
+    fn downloads(&self) -> bool {
+        true
+    }
+    fn download(&mut self, name: &str, _bytes: &[u8]) -> bool {
+        self.got.lock().unwrap().push(name.to_string());
+        true
+    }
+    fn host_file(&self) -> Option<String> {
+        self.file.map(str::to_string)
+    }
+}
+
+fn app(file: Option<&'static str>) -> (FigApp, Saved) {
+    let got = Saved::default();
+    let mut app = FigApp::new(Session::empty(), Box::new(Host { got: got.clone(), file }));
+    app.session.execute("file.new", &json!({"name": "Original"})).unwrap();
+    (app, got)
+}
+
+#[test]
+fn save_keeps_the_name_the_host_opened() {
+    let (mut app, got) = app(Some("client.figcraft"));
+    app.save();
+    assert_eq!(got.lock().unwrap().as_slice(), ["client.figcraft"]);
+}
+
+#[test]
+fn save_as_uses_the_document_s_own_name() {
+    let (mut app, got) = app(Some("client.figcraft"));
+    app.save_as_dialog();
+    assert_eq!(got.lock().unwrap().as_slice(), ["Original.figcraft"]);
+}
+
+#[test]
+fn without_a_host_file_or_for_a_copy_format_save_is_a_save_as() {
+    for file in [None, Some("design.json"), Some("export.fig")] {
+        let (mut app, got) = app(file);
+        app.save();
+        assert_eq!(got.lock().unwrap().as_slice(), ["Original.figcraft"], "{file:?}");
+    }
+}
diff --git a/crates/ui-egui/src/lib.rs b/crates/ui-egui/src/lib.rs
index e9969c106..a7397cee4 100644
--- a/crates/ui-egui/src/lib.rs
+++ b/crates/ui-egui/src/lib.rs
@@ -124,6 +124,8 @@ mod home_recents_tests;
 #[cfg(test)]
 mod home_tests;
 #[cfg(test)]
+mod host_save_tests;
+#[cfg(test)]
 mod idle_tests;
 #[cfg(test)]
 mod ime_tests;
diff --git a/crates/ui-egui/src/services.rs b/crates/ui-egui/src/services.rs
index c9f8e22a2..b5a997a85 100644
--- a/crates/ui-egui/src/services.rs
+++ b/crates/ui-egui/src/services.rs
@@ -24,6 +24,11 @@ pub trait Services {
     fn download(&mut self, _name: &str, _bytes: &[u8]) -> bool {
         false
     }
+    /// The document file a host page opened, where the app runs inside one (the browser's host
+    /// mode): a Save of that document keeps this name instead of the document's own.
+    fn host_file(&self) -> Option<String> {
+        None
+    }
     /// A folder to write several files into.
     fn pick_folder(&mut self, _title: &str) -> DialogFuture {
         Box::pin(std::future::ready(None))

From 01762dae332960ba0b3b81a7e0bafad57d139695 Mon Sep 17 00:00:00 2001
From: FredApps <153173854+FredApps@users.noreply.github.com>
Date: Thu, 5 Nov 2026 15:48:40 +0100
Subject: [PATCH 38/41] fix(ui): About credits table columns can be dragged
 wider or narrower (#1969)

* fix(ui): About credits table columns can be dragged wider or narrower

The Contributors and Models tables already open fitted to the dialog, the
name column taking the spare width, and scroll sideways only when there is
not room for every column. Their columns were fixed, though: no edge could
be dragged. They are resizable now, down to 28 points (the flexible column
to its minimum). Widening a column grows the table, as in a spreadsheet,
and only then does it scroll sideways; cells clip instead of overlapping.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* About: refit credits tables when what they measure changes

The columns became resizable, so the table keeps its own widths. A longer
name, a changed cell or a resized window left the old widths in place and
clipped text. The table now goes back to its fit when a column measure or
the clip rect width changes, which scrolling never moves.

Adds tests that drag every column edge, change the fit and scroll a
widened table, as CodeRabbit asked for the drag.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Tests: a fitted credits table fills the window exactly

The table ends on the window edge, which the layout rounds to whole points,
so the check allows that edge.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
---
 crates/ui-egui/src/dialogs/credits.rs         |  37 ++++--
 .../ui-egui/src/dialogs/credits/ui_tests.rs   | 119 ++++++++++++++++++
 2 files changed, 147 insertions(+), 9 deletions(-)

diff --git a/crates/ui-egui/src/dialogs/credits.rs b/crates/ui-egui/src/dialogs/credits.rs
index e10a8434a..2c64ccafb 100644
--- a/crates/ui-egui/src/dialogs/credits.rs
+++ b/crates/ui-egui/src/dialogs/credits.rs
@@ -247,6 +247,8 @@ const SORT_ARROW_W: f32 = 12.0;
 /// Padding inside each cell, on each side.
 const CELL_PAD: f32 = 6.0;
 const NAME_MIN_W: f32 = 110.0;
+/// The narrowest a credits column can be dragged.
+const MIN_COLUMN: f32 = 28.0;
 
 /// About ▸ Contributors: a name toggle, a sort, and the list as a grab bag or a table.
 pub fn contributors_ui(ui: &mut egui::Ui) {
@@ -341,13 +343,17 @@ fn column_width<'a>(ui: &egui::Ui, header: &str, cells: impl Iterator<Item = &'a
 }
 
 /// A credits table: columns of `widths`, the `None` one taking what the others leave (at least
-/// `flex_min`). The header stays put while the rows scroll, within `height` (header included). Too
-/// narrow for every column, it scrolls sideways rather than clip one.
+/// [`NAME_MIN_W`]). The header stays put while the rows scroll, within `height` (header included). Too
+/// narrow for every column, it scrolls sideways rather than clip one. Every
+/// column edge can be dragged, down to [`MIN_COLUMN`] (the `None` column to [`NAME_MIN_W`]): widening
+/// a column grows the table, as in a spreadsheet, and only then does it scroll sideways. When the
+/// window, a column's width or `flex_text` (the width the `None` column's text needs) changes, the
+/// columns go back to this fit, dropping any dragged widths.
 fn credits_table(
     ui: &mut egui::Ui,
     id: &str,
     widths: &[Option<f32>],
-    flex_min: f32,
+    flex_text: f32,
     height: f32,
     header: impl FnOnce(egui_extras::TableRow<'_, '_>),
     body: impl FnOnce(egui_extras::TableBody<'_>),
@@ -358,21 +364,31 @@ fn credits_table(
     // The table puts a row gap under its header.
     let body_h = (height - TABLE_HEADER_H - ui.spacing().item_spacing.y).max(TABLE_ROW_H);
     egui::ScrollArea::horizontal().id_salt((id, "h")).auto_shrink([false, true]).show(ui, |ui| {
-        let flex = (ui.available_width() - fixed).max(flex_min);
+        let flex = (ui.available_width() - fixed).max(NAME_MIN_W);
         // No gaps between cells: their padding spaces them, and the header rule runs unbroken.
         ui.spacing_mut().item_spacing.x = 0.0;
+        // The table keeps its own column widths, so a change in what they were fitted to has to clear
+        // them. Scrolling can nudge the available width, so this compares the clip rect, which scrolling
+        // never moves.
+        let fit = egui::Id::unique(("credits_fit", id));
+        let measured = (widths.to_vec(), flex_text, ui.clip_rect().width());
+        let refit = ui.data_mut(|d| d.get_temp::<(Vec<Option<f32>>, f32, f32)>(fit)).as_ref() != Some(&measured);
+        ui.data_mut(|d| d.insert_temp(fit, measured));
         let mut b = egui_extras::TableBuilder::new(ui)
             .id_salt(id)
             .striped(true)
-            .resizable(false)
+            .resizable(true)
             .auto_shrink([false, false])
             .min_scrolled_height(body_h)
             .max_scroll_height(body_h)
             .cell_layout(egui::Layout::left_to_right(egui::Align::Center));
+        if refit {
+            b.reset();
+        }
         for w in widths {
             b = b.column(match w {
-                Some(w) => egui_extras::Column::exact(*w),
-                None => egui_extras::Column::exact(flex).clip(true),
+                Some(w) => egui_extras::Column::initial(*w).at_least(MIN_COLUMN).clip(true),
+                None => egui_extras::Column::initial(flex).at_least(NAME_MIN_W).clip(true),
             });
         }
         b.header(TABLE_HEADER_H, header).body(body);
@@ -395,11 +411,13 @@ fn table(ui: &mut egui::Ui, list: &[&Contributor], v: &mut View, height: f32) {
     let t = Tokens::get(ui.ctx());
     let names = v.names;
     let widths = contributor_widths(ui, list);
+    let shown: Vec<String> = list.iter().map(|c| c.name(names)).collect();
+    let name_text = column_width(ui, SortKey::Name.label().1, shown.iter().map(String::as_str));
     credits_table(
         ui,
         "credits_table",
         &widths,
-        NAME_MIN_W,
+        name_text,
         height,
         |mut header| {
             for k in SortKey::ALL {
@@ -522,12 +540,13 @@ fn models_in(ui: &mut egui::Ui, models: &[Model], total_commits: u64) {
     let total = total_commits.max(models.iter().map(|m| m.commits).max().unwrap_or(0));
     let rows: Vec<[String; 6]> = models.iter().map(|m| model_cells(m, total)).collect();
     let widths = model_widths(ui, &rows);
+    let model_text = column_width(ui, tr(MODEL_HEADS[1]), rows.iter().filter_map(|r| r.get(1)).map(String::as_str));
     let numeric = |i: usize| i >= 3;
     credits_table(
         ui,
         "credits_models",
         &widths,
-        NAME_MIN_W,
+        model_text,
         table_height(ui, rows.len()),
         |mut header| {
             for (i, h) in MODEL_HEADS.iter().enumerate() {
diff --git a/crates/ui-egui/src/dialogs/credits/ui_tests.rs b/crates/ui-egui/src/dialogs/credits/ui_tests.rs
index fb3993ad9..cc2df5786 100644
--- a/crates/ui-egui/src/dialogs/credits/ui_tests.rs
+++ b/crates/ui-egui/src/dialogs/credits/ui_tests.rs
@@ -267,3 +267,122 @@ fn the_about_window_draws_every_tab() {
         assert_eq!(app.ui.about_tab, tab);
     }
 }
+
+const WINDOW: f32 = 640.5;
+const WIDTHS: [Option<f32>; 3] = [None, Some(80.0), Some(80.0)];
+const NAME: f32 = 120.0;
+
+/// One frame of a table long enough to scroll, in a window `width` wide; the rects of its header cells.
+fn table_frame(ctx: &egui::Context, width: f32, widths: &[Option<f32>], name: f32, events: Vec<egui::Event>) -> Vec<Rect> {
+    let screen_rect = Some(Rect::from_min_size(egui::Pos2::ZERO, vec2(width, 300.0)));
+    let raw = egui::RawInput { screen_rect, events, ..Default::default() };
+    let mut cells = Vec::new();
+    let out = ctx.run_ui(raw, |ui| {
+        cells.clear();
+        credits_table(
+            ui,
+            "test",
+            widths,
+            name,
+            240.0,
+            |mut header| {
+                for _ in widths {
+                    header.col(|ui| cells.push(ui.max_rect()));
+                }
+            },
+            |body| {
+                body.rows(TABLE_ROW_H, 40, |mut row| {
+                    for _ in widths {
+                        row.col(|ui| {
+                            ui.label("x");
+                        });
+                    }
+                });
+            },
+        );
+    });
+    out.drop_without_applying_deltas();
+    cells
+}
+
+/// [`table_frame`] at the usual size.
+fn settled_frame(ctx: &egui::Context) -> Vec<Rect> {
+    table_frame(ctx, WINDOW, &WIDTHS, NAME, Vec::new())
+}
+
+/// A new context with the table open and settled, and the rects of its header cells.
+fn opened_table() -> (egui::Context, Vec<Rect>) {
+    let ctx = egui::Context::default();
+    settled_frame(&ctx);
+    let cells = settled_frame(&ctx);
+    (ctx, cells)
+}
+
+/// Drags a column's right edge (cells have no gap between them), then lets go.
+fn drag_edge(ctx: &egui::Context, cell: Rect, by: f32) {
+    let start = egui::pos2(cell.right(), cell.center().y);
+    let halfway = start + vec2(by / 2.0, 0.0);
+    let end = start + vec2(by, 0.0);
+    let moved = egui::Event::PointerMoved;
+    let button = |pos, pressed| egui::Event::PointerButton { pos, button: egui::PointerButton::Primary, pressed, modifiers: egui::Modifiers::NONE };
+    for event in [moved(start), button(start, true), moved(halfway), moved(end), button(end, false)] {
+        table_frame(ctx, WINDOW, &WIDTHS, NAME, vec![event]);
+    }
+}
+
+#[test]
+fn every_column_can_be_dragged_at_its_right_edge_and_stays_there() {
+    let (_, opened) = opened_table();
+    for (dragged, cell) in opened.iter().enumerate() {
+        let (ctx, _) = opened_table();
+        drag_edge(&ctx, *cell, -30.0);
+        settled_frame(&ctx);
+        let after = settled_frame(&ctx);
+        for (column, (was, now)) in opened.iter().zip(&after).enumerate() {
+            let want = if column == dragged { was.width() - 30.0 } else { was.width() };
+            assert!((now.width() - want).abs() < 1.0, "dragging column {dragged}: column {column} is {now:?}, was {was:?}");
+        }
+    }
+}
+
+#[test]
+fn a_changed_fit_replaces_the_column_widths() {
+    let (ctx, opened) = opened_table();
+    drag_edge(&ctx, opened[0], -30.0);
+    let longer_name = table_frame(&ctx, WINDOW, &WIDTHS, NAME + 80.0, Vec::new());
+    assert!((longer_name[0].width() - opened[0].width()).abs() < 1.0, "a longer name drops a dragged width: {longer_name:?}");
+    let wider = table_frame(&ctx, WINDOW, &[None, Some(200.0), Some(80.0)], NAME, Vec::new());
+    let widths: Vec<f32> = wider.iter().map(|c| c.width().round()).collect();
+    assert!(widths.ends_with(&[200.0, 80.0]), "a longer cell widens its column: {widths:?}");
+    // The table fills the window, which the layout rounds to whole points.
+    assert!(wider[2].right() <= WINDOW.ceil(), "the table still fits the window: {wider:?}");
+    let narrower = table_frame(&ctx, 400.0, &WIDTHS, NAME, Vec::new());
+    assert!(narrower[2].right() <= 400.0, "a narrower window refits the table: {narrower:?}");
+}
+
+#[test]
+fn scrolling_sideways_keeps_dragged_widths() {
+    let (ctx, opened) = opened_table();
+    drag_edge(&ctx, opened[0], 100.0);
+    settled_frame(&ctx);
+    let dragged = settled_frame(&ctx);
+    assert!((dragged[0].width() - opened[0].width() - 100.0).abs() < 1.0, "the drag took: {dragged:?}");
+    table_frame(&ctx, WINDOW, &WIDTHS, NAME, vec![egui::Event::PointerMoved(dragged[0].center())]);
+    let mut scrolled = false;
+    for delta in [-13.3, -27.77, -41.1, 30.6] {
+        let wheel = egui::Event::MouseWheel {
+            source: egui::MouseWheelSource::Unknown,
+            unit: egui::MouseWheelUnit::Point,
+            delta: vec2(delta, 0.0),
+            modifiers: egui::Modifiers::NONE,
+            phase: egui::TouchPhase::Move,
+        };
+        table_frame(&ctx, WINDOW, &WIDTHS, NAME, vec![wheel]);
+        for _ in 0..8 {
+            let cells = settled_frame(&ctx);
+            assert!((cells[0].width() - dragged[0].width()).abs() < 1.0, "scrolled by {delta}: {cells:?}");
+            scrolled |= cells[0].left() < dragged[0].left() - 1.0;
+        }
+    }
+    assert!(scrolled, "the wheel never moved the table sideways");
+}

From 64f254a823a9ffb9b2f110dcc7fb71a151efb8fc Mon Sep 17 00:00:00 2001
From: Trevor Brown <trevorbrown.dev@gmail.com>
Date: Thu, 5 Nov 2026 16:07:52 -0500
Subject: [PATCH 39/41] Colour picker: dragging a gradient handle on the canvas
 keeps the picker and the handles up (#1852) (#1985)

* M1: dragging a gradient handle on the canvas keeps the colour picker open (#1852)

A press on one of the open gradient's handles or stops closed the picker: the canvas took the press
and began the drag, then the picker, drawn later in the same frame, saw a press outside its card and
closed, committing the drag's interaction at once. The handles vanished with the picker and the drag
went on without an undo step of its own. The handles are the picker's controls: while a gradient
handle or stop drags (`handles::gradient_dragging`, the press included) the picker doesn't close on
an outside press, as it already doesn't while the eyedropper samples. A press elsewhere on the
canvas still closes it. Docs: ui-parity.md.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* M1: a handle drag released off the canvas ends there (#1852)

Review: a gradient handle drag whose button went up over a panel, over the colour picker or outside
the window stayed stashed, its interaction uncommitted, until the pointer was back on the canvas,
and the next press there moved the handle to wherever it landed; with the picker now held open while
a gradient drag is stashed, it would also have stayed open meanwhile. `handles::end_released_drag`
commits and clears a stashed drag when the button is up, called from the canvas input's off-canvas
branch and when the pointer is over something drawn above the canvas. Test:
`a_gradient_drag_released_off_the_canvas_ends_there` (released over the sidebar and over the picker).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* M1: a handle drag ends on a release over a ruler, and when Escape or Undo closes its gesture (#1852)

The release check ran only where the pointer was not on the canvas, after the
comment pins and ruler guides had their turn; both return early, so a gradient
handle released over a ruler stayed dragged, uncommitted, until the next press.
It now runs first, wherever the pointer is, and the frame it ends a drag on is
the handle's, as the release on the handle itself was.

Escape (the picker closes and commits) or Undo can also close the gesture while
the button is still down. The stashed drag then kept setting the fill every
frame with no gesture open, one undo step a frame; with no gesture open the
drag is now over.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
Co-authored-by: FredApps <153173854+FredApps@users.noreply.github.com>
---
 crates/ui-egui/src/canvas/handles.rs          |  32 ++++
 crates/ui-egui/src/canvas/input.rs            |   8 +
 .../src/colorpicker_selection_tests.rs        | 157 ++++++++++++++++++
 crates/ui-egui/src/widgets/colorpicker.rs     |   5 +-
 docs/ui-parity.md                             |   7 +-
 5 files changed, 205 insertions(+), 4 deletions(-)

diff --git a/crates/ui-egui/src/canvas/handles.rs b/crates/ui-egui/src/canvas/handles.rs
index 137e2c92b..949819b03 100644
--- a/crates/ui-egui/src/canvas/handles.rs
+++ b/crates/ui-egui/src/canvas/handles.rs
@@ -185,6 +185,33 @@ fn drag_id() -> Id {
     Id::unique("figcraft_handle_drag")
 }
 
+/// Whether a gradient handle or stop on the canvas is being dragged, the press that starts it
+/// included: those are the open colour picker's own controls, so the picker stays through the drag
+/// instead of taking the press for one outside it (#1852).
+pub fn gradient_dragging(ctx: &egui::Context) -> bool {
+    matches!(ctx.data(|d| d.get_temp::<Drag>(drag_id())), Some(Drag::Gradient { .. }))
+}
+
+/// Whether the document has a gesture open: a handle drag edits only inside its own.
+fn gesture_open(app: &FigApp) -> bool {
+    app.session.ds().is_ok_and(|d| d.interaction.is_some())
+}
+
+/// A handle drag whose button went up wherever the pointer was (off the canvas, over a panel, the
+/// colour picker or a ruler, outside the window) ends as a release on the handle would: the edit
+/// commits now, instead of waiting, uncommitted, to move the handle to wherever the pointer next
+/// presses. So does one whose gesture Escape or Undo closed under the held button: it stops there
+/// rather than editing on with no gesture open, an undo step a frame. True when a drag ended.
+pub fn end_released_drag(app: &mut FigApp, ctx: &egui::Context) -> bool {
+    let stashed = ctx.data(|d| d.get_temp::<Drag>(drag_id())).is_some();
+    if !stashed || (ctx.input(|i| i.pointer.primary_down()) && gesture_open(app)) {
+        return false;
+    }
+    let _ = app.session.commit_interaction();
+    ctx.data_mut(|d| d.remove::<Drag>(drag_id()));
+    true
+}
+
 /// The gradient being edited (single node, picker open on a gradient paint).
 fn gradient_target(app: &FigApp) -> Option<(NodeId, bool, usize, figcraft_color::Gradient)> {
     let Some(PickerTarget::Paint { fills, index, ids }) = &app.ui.picker else { return None };
@@ -516,6 +543,11 @@ pub fn input(app: &mut FigApp, ctx: &egui::Context, pos: Pos2) -> bool {
     });
     let dragging: Option<Drag> = ctx.data(|d| d.get_temp(drag_id()));
     if let Some(drag) = dragging {
+        // Escape or Undo closed the gesture under the held button: the drag is over.
+        if !gesture_open(app) {
+            ctx.data_mut(|d| d.remove::<Drag>(drag_id()));
+            return true;
+        }
         if down {
             apply(app, &drag, pos, shift);
             ctx.set_cursor_icon(egui::CursorIcon::Grabbing);
diff --git a/crates/ui-egui/src/canvas/input.rs b/crates/ui-egui/src/canvas/input.rs
index 5aa054163..3ef5d7574 100644
--- a/crates/ui-egui/src/canvas/input.rs
+++ b/crates/ui-egui/src/canvas/input.rs
@@ -183,6 +183,8 @@ pub(super) fn input(app: &mut FigApp, ui: &mut Ui, resp: &egui::Response) -> boo
         if !ctx.input(|i| i.pointer.button_down(egui::PointerButton::Middle) || i.pointer.primary_down()) {
             app.canvas.middle_pan = None;
         }
+        // So is a handle drag.
+        crate::handles::end_released_drag(app, &ctx);
         return true;
     };
     // A press on the canvas gives the keyboard back to it (arrows nudge again).
@@ -230,6 +232,12 @@ pub(super) fn input(app: &mut FigApp, ui: &mut Ui, resp: &egui::Response) -> boo
         }
         return true;
     }
+    // A handle drag whose button went up ends first, wherever on the canvas the pointer is: over a
+    // ruler or a comment pin, which take the pointer below, or over something drawn above the
+    // canvas (the colour picker, a card). The handle had the press, so it has the release too.
+    if crate::handles::end_released_drag(app, &ctx) {
+        return false;
+    }
     if !app.canvas.dragging && (resp.hovered() || app.ui.comments.dragging()) && crate::comments::input(app, &ctx, pos) {
         return false;
     }
diff --git a/crates/ui-egui/src/colorpicker_selection_tests.rs b/crates/ui-egui/src/colorpicker_selection_tests.rs
index 1e0fe8d1d..e791e0ca9 100644
--- a/crates/ui-egui/src/colorpicker_selection_tests.rs
+++ b/crates/ui-egui/src/colorpicker_selection_tests.rs
@@ -215,3 +215,160 @@ fn a_press_in_the_gradient_variable_picker_keeps_the_colour_picker_open() {
     assert!(u.app.ui.picker.is_some(), "the child variable picker is part of the interaction");
     u.button(at, false);
 }
+
+#[test]
+fn dragging_a_gradient_handle_on_the_canvas_keeps_the_picker_open() {
+    // #1852: the handles belong to the picker, so the press that starts a drag is not a press
+    // outside it: the picker and the handles stay, the drag is one undo step, and a press elsewhere
+    // on the layer still closes it.
+    let mut s = Session::new();
+    let a = NodeId(s.execute("shape.rectangle", &json!({"x": 100, "y": 100, "width": 200, "height": 200})).unwrap()["id"].as_u64().unwrap());
+    s.execute("fill.set", &json!({"id": a, "paint": {"type": "linearGradient", "stops": ["#ff0000", "#0000ff"]}})).unwrap();
+    s.execute("select.set", &json!({"ids": [a]})).unwrap();
+    let mut u = Ui::new(s);
+    let target = PickerTarget::Paint { fills: true, index: 0, ids: vec![a] };
+    u.app.open_picker(target.clone(), None);
+    for _ in 0..5 {
+        u.frame(vec![]);
+    }
+    assert_eq!(u.app.ui.picker, Some(target.clone()));
+    let depth = u.app.session.undo_depth().0;
+    let from_handle = |u: &Ui| match &u.app.session.doc().unwrap().node(a).unwrap().fills[0].kind {
+        figcraft_color::PaintKind::Gradient(g) => g.from,
+        _ => panic!("the fill is a gradient"),
+    };
+    assert_eq!(from_handle(&u), (0.5, 0.0), "a linear gradient starts at the top middle");
+    // Drag the start handle from the top middle of the layer to its left middle.
+    let from = u.app.to_screen(200.0, 100.0);
+    let to = u.app.to_screen(100.0, 200.0);
+    u.button(from, true);
+    assert_eq!(u.app.ui.picker, Some(target.clone()), "the press on the handle keeps the picker open");
+    for _ in 0..2 {
+        u.frame(vec![egui::Event::PointerMoved(to)]);
+    }
+    assert_eq!(u.app.ui.picker, Some(target.clone()), "and so does the drag");
+    let (x, y) = from_handle(&u);
+    assert!(x.abs() < 0.02 && (y - 0.5).abs() < 0.02, "the handle followed the pointer: ({x}, {y})");
+    u.button(to, false);
+    u.frame(vec![]);
+    assert_eq!(u.app.ui.picker, Some(target.clone()), "released, the picker is still open");
+    assert_eq!(u.app.session.undo_depth().0, depth + 1, "the drag is one undo step");
+    // A press on the layer away from its handles is still a press outside the picker.
+    let body = u.app.to_screen(250.0, 250.0);
+    u.button(body, true);
+    u.button(body, false);
+    u.frame(vec![]);
+    assert!(u.app.ui.picker.is_none(), "a plain canvas press closes it");
+}
+
+#[test]
+fn a_gradient_drag_released_off_the_canvas_ends_there() {
+    // A handle drag whose button goes up over the sidebar or over the picker itself ends there:
+    // the edit commits, the picker stays, and the next press on the canvas is a plain press (it
+    // closes the picker) rather than a move of the handle to wherever it landed.
+    for over in ["sidebar", "picker"] {
+        let mut s = Session::new();
+        let a = NodeId(s.execute("shape.rectangle", &json!({"x": 100, "y": 100, "width": 200, "height": 200})).unwrap()["id"].as_u64().unwrap());
+        s.execute("fill.set", &json!({"id": a, "paint": {"type": "linearGradient", "stops": ["#ff0000", "#0000ff"]}})).unwrap();
+        s.execute("select.set", &json!({"ids": [a]})).unwrap();
+        let mut u = Ui::new(s);
+        let target = PickerTarget::Paint { fills: true, index: 0, ids: vec![a] };
+        u.app.open_picker(target.clone(), None);
+        for _ in 0..5 {
+            u.frame(vec![]);
+        }
+        let depth = u.app.session.undo_depth().0;
+        let from_handle = |u: &Ui| match &u.app.session.doc().unwrap().node(a).unwrap().fills[0].kind {
+            figcraft_color::PaintKind::Gradient(g) => g.from,
+            _ => panic!("the fill is a gradient"),
+        };
+        u.button(u.app.to_screen(200.0, 100.0), true);
+        u.frame(vec![egui::Event::PointerMoved(u.app.to_screen(100.0, 200.0))]);
+        assert!(crate::handles::gradient_dragging(&u.ctx), "{over}: the handle is being dragged");
+        let spot = match over {
+            "sidebar" => u.app.ui.right_panel_rect.unwrap().center(),
+            _ => u.app.ui.picker_popover.as_ref().unwrap().rect.center(),
+        };
+        if over == "picker" {
+            assert!(u.app.canvas.rect.contains(spot), "the picker lies over the canvas");
+        } else {
+            assert!(!u.app.canvas.rect.contains(spot), "the sidebar is off the canvas");
+        }
+        u.button(spot, false);
+        u.frame(vec![]);
+        assert!(!crate::handles::gradient_dragging(&u.ctx), "{over}: the release ended the drag");
+        assert_eq!(u.app.ui.picker, Some(target.clone()), "{over}: the picker is still open");
+        assert_eq!(u.app.session.undo_depth().0, depth + 1, "{over}: the drag is one undo step");
+        let moved = from_handle(&u);
+        assert!(moved.0.abs() < 0.02 && (moved.1 - 0.5).abs() < 0.02, "{over}: the handle stayed where it was dragged: {moved:?}");
+        // The next press on the layer is a plain one: the handle stays put and the picker closes.
+        let body = u.app.to_screen(250.0, 250.0);
+        u.button(body, true);
+        u.frame(vec![]);
+        assert_eq!(from_handle(&u), moved, "{over}: a later press doesn't move the handle");
+        assert!(u.app.ui.picker.is_none(), "{over}: a later press closes the picker as any outside press does");
+        u.button(body, false);
+    }
+}
+
+/// A rectangle with a linear gradient fill, selected, its picker open and the canvas settled; a
+/// second layer drawn after it leaves an undo step that isn't the gradient's. Rulers on or off.
+fn gradient_ui(rulers: bool) -> Ui {
+    let mut s = Session::new();
+    if rulers {
+        s.execute("view.rulers", &json!({"on": true})).unwrap();
+    }
+    let a = NodeId(s.execute("shape.rectangle", &json!({"x": 100, "y": 100, "width": 200, "height": 200})).unwrap()["id"].as_u64().unwrap());
+    s.execute("fill.set", &json!({"id": a, "paint": {"type": "linearGradient", "stops": ["#ff0000", "#0000ff"]}})).unwrap();
+    s.execute("shape.rectangle", &json!({"x": 400, "y": 100, "width": 20, "height": 20})).unwrap();
+    s.execute("select.set", &json!({"ids": [a]})).unwrap();
+    let mut u = Ui::new(s);
+    u.app.open_picker(PickerTarget::Paint { fills: true, index: 0, ids: vec![a] }, None);
+    for _ in 0..5 {
+        u.frame(vec![]);
+    }
+    u
+}
+
+#[test]
+fn a_gradient_drag_released_over_a_ruler_ends_there() {
+    // The rulers take the pointer on the canvas before the handles do: the release still ends the
+    // drag, as one undo step, instead of leaving it waiting for the next press.
+    let mut u = gradient_ui(true);
+    let depth = u.app.session.undo_depth().0;
+    u.button(u.app.to_screen(200.0, 100.0), true);
+    u.frame(vec![egui::Event::PointerMoved(u.app.to_screen(100.0, 200.0))]);
+    assert!(crate::handles::gradient_dragging(&u.ctx), "the handle is being dragged");
+    let r = u.app.canvas.rect;
+    let ruler = egui::Pos2::new(r.min.x + 5.0, r.center().y);
+    assert!(!u.app.ui.picker_popover.as_ref().unwrap().rect.contains(ruler), "the ruler is not under the picker");
+    u.button(ruler, false);
+    assert!(!crate::handles::gradient_dragging(&u.ctx), "the release over the ruler ended the drag");
+    assert_eq!(u.app.session.undo_depth().0, depth + 1, "the drag is one undo step");
+}
+
+#[test]
+fn a_gradient_drag_whose_gesture_closes_under_the_held_button_stops_editing() {
+    // Escape (the picker closes and commits) or Undo ends the gesture while the button is still
+    // down: moving on edits nothing more, rather than adding an undo step every frame.
+    for close in ["escape", "undo"] {
+        let mut u = gradient_ui(false);
+        u.button(u.app.to_screen(200.0, 100.0), true);
+        u.frame(vec![egui::Event::PointerMoved(u.app.to_screen(100.0, 200.0))]);
+        assert!(crate::handles::gradient_dragging(&u.ctx), "{close}: the handle is being dragged");
+        if close == "escape" {
+            crate::colorpicker::close(&mut u.app);
+        } else {
+            assert!(u.app.session.undo().unwrap(), "{close}: there is a step to undo");
+        }
+        let depth = u.app.session.undo_depth().0;
+        let doc = u.app.session.doc().unwrap().clone();
+        for k in 1..=4 {
+            u.frame(vec![egui::Event::PointerMoved(u.app.to_screen(100.0 + 20.0 * f64::from(k), 200.0))]);
+        }
+        assert!(!crate::handles::gradient_dragging(&u.ctx), "{close}: the drag is over");
+        assert_eq!(u.app.session.undo_depth().0, depth, "{close}: no undo step a frame");
+        assert!(*u.app.session.doc().unwrap() == doc, "{close}: the gradient stays where the gesture left it");
+        u.button(u.app.to_screen(180.0, 200.0), false);
+    }
+}
diff --git a/crates/ui-egui/src/widgets/colorpicker.rs b/crates/ui-egui/src/widgets/colorpicker.rs
index 5fbcc7b40..6ba6af305 100644
--- a/crates/ui-egui/src/widgets/colorpicker.rs
+++ b/crates/ui-egui/src/widgets/colorpicker.rs
@@ -977,7 +977,10 @@ pub fn show(app: &mut FigApp, ctx: &egui::Context) {
     // Sampling a colour from the canvas — the eyedropper this picker's own button started, or the
     // colour it just sampled — is the press, not a press outside: neither may close the picker.
     let picking = app.session.tool.pick_only || app.session.tool.picked.is_some();
-    pop = pop.close_on_outside(!picking);
+    // Nor may a press on the open gradient's handles or stops on the canvas: they are this picker's
+    // controls, and the canvas took the press before the picker drew (#1852).
+    let own = picking || crate::handles::gradient_dragging(ctx);
+    pop = pop.close_on_outside(!own);
     // Only the opening control is held out: any other sidebar or canvas press dismisses it.
     let mut held: Vec<Rect> = app.ui.picker_button.into_iter().collect();
     held.extend(crate::variable_ui::picker_rect(ctx));
diff --git a/docs/ui-parity.md b/docs/ui-parity.md
index cc0fc9db8..d98a6ed73 100644
--- a/docs/ui-parity.md
+++ b/docs/ui-parity.md
@@ -1,6 +1,6 @@
 # UI and interaction parity
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (a click with the Bend tool on a sharp point curves it, its handles along the line between its neighbours, as Edit vector layers says (#1875); wrap style: Auto, Balance and Pretty on a text layer decide where its lines break, as Explore text properties says (#1827), with the Type settings control, `text.wrapStyle`, `node.set wrapStyle`, inspect and the CSS `text-wrap`; Backspace or Delete at the start of a list item keeps the item's indentation level, as the lists article says; max lines on auto-width text keep it auto width, hugging that many lines, as the text properties article says; superscript and subscript are synthesised where the font has no glyphs for them, from the standard glyphs shrunk and shifted by the font's OS/2 metrics, and a run mixing available and unavailable glyphs is synthesised whole, as Explore text properties says (#1828); Alt+Enter while editing text opens the link at the caret, as the accessibility page documents; Minimize, by its shortcut or the button by the file name, collapses the navigation bar and both sidebars as the help center says, with the right sidebar back while something is selected (#1835); the interface size keys of the help center's accessibility page: Cmd/Ctrl+Shift+Alt with =, - and 0 step the interface through the Preferences sizes and back to the system's size; Cmd/Ctrl+Alt+arrows rotate the selection a degree at a time, 15 with Shift, as the help center's accessibility page says; they resized before; the Layers panel answers Ctrl+1 as well as Alt+1 on Windows and Linux, the two keys the help center gives it; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the keyboard's Menu key opens the context menu, as Shift+F10 does; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; sidebar number and text fields keep their text vertically centered when focused, including typography spacing; with the pen out, Enter or a double-click ends the path and edits the vector with the Move tool instead of drawing on (#1430); the Actions palette offers only commands that run from it, and no second row reading like a menu item: Place image opens the file dialog (#1574); Preferences ▸ Scroll wheel zoom: a mouse wheel zooms the canvas about the pointer and Cmd/Ctrl+wheel scrolls (#1390); boolean operations refuse input past their caps, and a boolean group past them draws without its result (#1104); the selection and hover outlines of rounded rectangles and frames follow their corners (#1506); colour picker review fixes for text undo, fitted sidebars, moving controls and gradient variables; Corner smoothing: an original icon and the shared number-field drag gesture, preserving fractional baselines; guides snap to layers when dragged; Crop image: Object ▸ Crop image, the right-click menu and the image fill row enter crop mode (`image.crop`, #1464); the Design panel's sections on one grid — 16 / 8 margins, 88 + 8 + 88 + 8 + 24 columns, 24 pt rows, 4 pt between a row's buttons (#858); the toolbar on one 32 pt grid, without its Resources button (#1210); colour picker LCH and OKLCH models; an XML (Android Vector Drawable) export format; Context menus: the Menu key reaches egui 0.37 but is unbound (row done → partial); the Text on a path tool; board tool keys pinned; community fixes: the text box by dragging, the font picker keys, the pen path on leaving Design, a still canvas in vector edit mode, a scrolling pages list, colour emoji, readable new text in frames, system theme on first run; the Small caps sample in Type settings drawn from capitals; recent files as cards; vector edit mode: hovering, hatching, selecting and dragging filled regions; home screen: Templates tab, first-run templates and Getting started tips; number fields: scrub rates, arrow steps, arithmetic with brackets, relative edits of mixed values; outline mode's hidden layers and object bounds; Hide when publishing; cursors per tool and modifier; panel widths; dark pages for files made in the dark theme; drag threshold and double-clicks into text in groups; rotation origin on Alt+R and placing with Enter: no documented shortcut missing; keyboard shortcut parity suite and bindings; cursor chat and spotlight in live sessions; layers and assets panels behaviour suite and fixes; vector multi-edit and the vector edit tail; canvas navigation, guides and grids behaviour suite and fixes; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; layers panel keyboard: F2 rename, Shift+F10 context menu, F8 box selection; selection and transform behaviour suite and fixes; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; boolean hit testing on the result, group drags, frame outlines and slices; outlines for the selection, mask outlines; arc fields, live boolean editing, shape builder on strokes, one-sided widths; fields select their text on focus; Typography spacing icons support scrubbing (#373); CSS colour names in hex fields; a rename selects the whole name, so typing replaces it; Escape or Enter after a pen path stays on the same vector (#760); IME composition kept on through idle frames of a text edit, candidates at the caret (#747); Selection colors for mixed selections and smart-selection spacing (#753); submenus with a hover delay and a safe triangle; the Actions palette's tabs, ranked search, highlight and recents; menu items that ask for a value; editor fixes from the community batches) · **Target:** Figma Design UI3 (desktop app 126.10.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-04 · **Change:** patch (a press on the open gradient's handles or stops on the canvas keeps the colour picker open through the drag, as its own control (#1852); a click with the Bend tool on a sharp point curves it, its handles along the line between its neighbours, as Edit vector layers says (#1875); wrap style: Auto, Balance and Pretty on a text layer decide where its lines break, as Explore text properties says (#1827), with the Type settings control, `text.wrapStyle`, `node.set wrapStyle`, inspect and the CSS `text-wrap`; Backspace or Delete at the start of a list item keeps the item's indentation level, as the lists article says; max lines on auto-width text keep it auto width, hugging that many lines, as the text properties article says; superscript and subscript are synthesised where the font has no glyphs for them, from the standard glyphs shrunk and shifted by the font's OS/2 metrics, and a run mixing available and unavailable glyphs is synthesised whole, as Explore text properties says (#1828); Alt+Enter while editing text opens the link at the caret, as the accessibility page documents; Minimize, by its shortcut or the button by the file name, collapses the navigation bar and both sidebars as the help center says, with the right sidebar back while something is selected (#1835); the interface size keys of the help center's accessibility page: Cmd/Ctrl+Shift+Alt with =, - and 0 step the interface through the Preferences sizes and back to the system's size; Cmd/Ctrl+Alt+arrows rotate the selection a degree at a time, 15 with Shift, as the help center's accessibility page says; they resized before; the Layers panel answers Ctrl+1 as well as Alt+1 on Windows and Linux, the two keys the help center gives it; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the keyboard's Menu key opens the context menu, as Shift+F10 does; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; sidebar number and text fields keep their text vertically centered when focused, including typography spacing; with the pen out, Enter or a double-click ends the path and edits the vector with the Move tool instead of drawing on (#1430); the Actions palette offers only commands that run from it, and no second row reading like a menu item: Place image opens the file dialog (#1574); Preferences ▸ Scroll wheel zoom: a mouse wheel zooms the canvas about the pointer and Cmd/Ctrl+wheel scrolls (#1390); boolean operations refuse input past their caps, and a boolean group past them draws without its result (#1104); the selection and hover outlines of rounded rectangles and frames follow their corners (#1506); colour picker review fixes for text undo, fitted sidebars, moving controls and gradient variables; Corner smoothing: an original icon and the shared number-field drag gesture, preserving fractional baselines; guides snap to layers when dragged; Crop image: Object ▸ Crop image, the right-click menu and the image fill row enter crop mode (`image.crop`, #1464); the Design panel's sections on one grid — 16 / 8 margins, 88 + 8 + 88 + 8 + 24 columns, 24 pt rows, 4 pt between a row's buttons (#858); the toolbar on one 32 pt grid, without its Resources button (#1210); colour picker LCH and OKLCH models; an XML (Android Vector Drawable) export format; Context menus: the Menu key reaches egui 0.37 but is unbound (row done → partial); the Text on a path tool; board tool keys pinned; community fixes: the text box by dragging, the font picker keys, the pen path on leaving Design, a still canvas in vector edit mode, a scrolling pages list, colour emoji, readable new text in frames, system theme on first run; the Small caps sample in Type settings drawn from capitals; recent files as cards; vector edit mode: hovering, hatching, selecting and dragging filled regions; home screen: Templates tab, first-run templates and Getting started tips; number fields: scrub rates, arrow steps, arithmetic with brackets, relative edits of mixed values; outline mode's hidden layers and object bounds; Hide when publishing; cursors per tool and modifier; panel widths; dark pages for files made in the dark theme; drag threshold and double-clicks into text in groups; rotation origin on Alt+R and placing with Enter: no documented shortcut missing; keyboard shortcut parity suite and bindings; cursor chat and spotlight in live sessions; layers and assets panels behaviour suite and fixes; vector multi-edit and the vector edit tail; canvas navigation, guides and grids behaviour suite and fixes; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; layers panel keyboard: F2 rename, Shift+F10 context menu, F8 box selection; selection and transform behaviour suite and fixes; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; boolean hit testing on the result, group drags, frame outlines and slices; outlines for the selection, mask outlines; arc fields, live boolean editing, shape builder on strokes, one-sided widths; fields select their text on focus; Typography spacing icons support scrubbing (#373); CSS colour names in hex fields; a rename selects the whole name, so typing replaces it; Escape or Enter after a pen path stays on the same vector (#760); IME composition kept on through idle frames of a text edit, candidates at the caret (#747); Selection colors for mixed selections and smart-selection spacing (#753); submenus with a hover delay and a safe triangle; the Actions palette's tabs, ranked search, highlight and recents; menu items that ask for a value; editor fixes from the community batches) · **Target:** Figma Design UI3 (desktop app 126.10.7)
 
 Fine canvas control is what Figma users feel first: handles, snapping, nudging, modifier keys,
 drag behaviour, numeric precision. This checklist covers the tools, gestures and panels. Status:
@@ -30,7 +30,7 @@ interaction feel not yet compared.
 | Colour names in hex fields | done | every hex field (fills, strokes, text ranges, effects, layout grids, colour variables, page and prototype backgrounds, the colour picker's Hex) takes a CSS colour name as well: `red` becomes `FF0000`; case, spaces and hyphens are ignored (`Light Blue`); names are opaque and keep the colour's opacity; hex wins where both could match. The picker's CSS field takes every CSS name too (`Color::from_hex_or_name`, `color::named`) |
 | Fields select their text on focus | done | Number and text values keep their vertical position when their editor gains focus (including typography spacing; `sidebar_field_text_stays_in_place_on_focus`). a click or Tab into a one-line field selects all of its text, so typing replaces the value: hex and colour fields, number fields, inline fields (a fill's hex, variable values, renames), names, search boxes and dialog fields; a drag from the press selects only what it covers; multi-line fields (descriptions, comments) keep the caret where clicked. The first click into an inline field (a fill's hex) now takes the keyboard; it took a second click. A rename (double-click, F2, File ▸ Rename, a page) selects the whole name before its field first draws, so a key typed in that same frame replaces the name; it was appended (`widgets::select_all_on_focus`, `select_all_tests`, `layers_rename_tests`) |
 | Colour picker models | done | Hex, RGB, HSL, HSB, LCH, OKLCH and CSS; LCH and OKLCH keep lightness and hue when a colour leaves sRGB (chroma comes down); the values typed stay while the colour is theirs (a hue typed on a grey, a chroma sRGB can't hold); CSS reads `lch()` and `oklch()` with any hue unit and `none` (`figcraft_color::{Lch, Oklch}`). Values are the stored channels read as sRGB |
-| Colour picker placement and dismissal | done | Opens 8 pt beside the sidebar at the opening control, lifted to fit the screen; outside presses (including the sidebar), Escape and X close it. Reopening resets a dragged position; eyedropper sampling keeps it open. |
+| Colour picker placement and dismissal | done | Opens 8 pt beside the sidebar at the opening control, lifted to fit the screen; outside presses (including the sidebar), Escape and X close it. Reopening resets a dragged position; eyedropper sampling keeps it open, and so does a drag of the open gradient's handles or stops on the canvas (#1852). |
 | Colour picker image well | partial | the Image tab shows a checkered placeholder and Upload from computer until there is a file (no dialog at once); an image paint shows its asset preview; a file dropped on the open picker replaces the image, keeping the fill mode, crop, position and adjustments (`image.replace`). Layers' fills and strokes only (text ranges, styles and selection colours keep Upload). The Fill and Stroke swatches take no drop: a dragged file's position isn't known, so a drop with none goes to the open picker |
 | Colour picker on a new fill or stroke | done | + opens the picker on the new paint when the selection shares one paint list; on a mixed selection + adds a paint to each layer and no picker opens (#404) |
 | Blend mode menus: the layer's (Design panel) and each paint's (colour picker) | done | Pass through and Normal are distinct (Normal isolates a group's or frame's children); paints have no pass-through; plus darker drawn exactly on the canvas |
@@ -113,7 +113,7 @@ interaction feel not yet compared.
 | Masks: what a mask hides doesn't take clicks; a mask group's box is the mask's | done | |
 | Layout grids (Ctrl+G) | done | columns, rows and grid; stretch, left, centre, right; Auto count; several per frame; styles; not shown or snapped on a rotated frame; a nested frame's grids snap but only top-level frames draw them |
 | Gamut warnings for Display P3 files | done | colour picker note; View ▸ Soft-proof sRGB stripes what sRGB can't show (the canvas itself is sRGB) |
-| Gradient and padding/gap handles on the canvas | done | |
+| Gradient and padding/gap handles on the canvas | done | the gradient's handles and stops show while its picker is open, and dragging one keeps the picker open (#1852) |
 | Hover outline, selection colours, handle sizes | done | measured from UI3 screenshots; the outline follows the layer's geometry, rounded corners (each radius and the smoothing) included, whatever the stroke alignment (#1506) |
 | Cursors per tool and modifier | done | the engine names a cursor for every tool, modifier and hover target (`tool.overlay.cursor`, tabled in `cursor_tests`) and the UI shows the system's or draws its own at the pointer (`cursors.rs`, `cursors_tests`; original glyphs from lines and the code-drawn icons). Arrow for Move and Scale; two-headed arrows on the handles that follow the handle and the box's rotation; outside a corner a curved rotate arrow turned to that corner, turning with the pointer while rotating; crosshair for the frame, section, slice, shape, pencil and Text tools; the I-beam over a text with the Text tool and over the text being edited; the pen as a cross with what a click does beside it (nothing: a new point; a ring: closes, connects to or goes on from a point; a plus: adds a point on a segment, also Alt in vector edit mode; a curve: bends, the Bend tool or Cmd/Ctrl); open and closed hand for the Hand tool, Space and the middle button; zoom in and out (Alt) while Z is held; eyedropper; comment pin; the copy cursor with Alt over a selected layer and while Alt-dragging; not-allowed while a drag resizes, rotates or moves a layer inside an instance (it is undone on release) and over a layers row that takes no drop. Ruler guides and gradient, crop and padding handles keep their own cursors (the tool's used to replace them). `ui.inspect` reports `cursor`. Left: no cursor for removing a point with the pen (the pen doesn't remove points); the drawn cursors follow the pointer a frame behind the system's; not compared with Figma's side by side |
 | Multiplayer cursors, cursor chat, spotlight | partial | in live sessions: named cursors, chat bubbles that fade, `/` to chat, spotlight from your avatar's menu with a banner; no audio or reactions |
@@ -178,6 +178,7 @@ in the table. `crates/ui-egui/src/shortcut_keys_tests.rs` drives the keys a look
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-04 | patch | M1, #1852: a press on one of the open gradient's handles or stops on the canvas is the colour picker's own, not a press outside it (Figma keeps the picker and the handles up while a handle or stop is dragged; the stops are made to be dragged: "You can click and drag a stop to change its placement on the gradient", Use gradients as a fill or stroke). The canvas took the press and began the drag, then the picker, drawn later in the same frame, saw a press outside its card and closed, committing the drag's interaction at once; the handles vanished with it and the drag went on without an undo step of its own. Now the picker stays while a gradient handle or stop drags, and the drag is one undo step; a press elsewhere on the canvas still closes it. A handle drag whose button goes up off the canvas (over a panel or the picker) ends there too, instead of waiting, uncommitted, to move the handle to the next press on the canvas. Tests: `colorpicker_selection_tests::dragging_a_gradient_handle_on_the_canvas_keeps_the_picker_open`, `colorpicker_selection_tests::a_gradient_drag_released_off_the_canvas_ends_there`. |
 | 2026-11-02 | patch | M8, #1875: a click with the Bend tool on a sharp point between two segments gives it handles along the line between its neighbours, a third of the way to each ("Click on a point or path where you want to add a curve", Edit vector layers); a click on a curved point still makes it sharp, a drag still sets the handles by hand, an endpoint is left alone. Between a handle's end and a point both within reach of the pointer, the nearer one on the page is hit (the handle on a tie), so a short path's point (its handles a few pixels long) can be clicked again. Before, only a drag curved a point, and a short one left two tiny handles in its direction. Tests: `vectoredit::tests::short_handles_leave_their_point_clickable`, `vectoredit::tests::a_bend_click_curves_a_sharp_point_between_its_neighbours`, `bend_tool_smooths_and_sharpens_points`. Numbers unchanged. |
 | 2026-11-02 | minor | M4, #1827: wrap style on a text layer (`WrapStyle`: Auto, Balance, Pretty): Balance re-breaks each paragraph at the narrowest width that keeps its line count (bisection over the greedy breaker, as browsers balance), Pretty narrows one of the last four lines just enough so the last line isn't one word; `text.wrapStyle`, `node.set wrapStyle` (`textWrap` too), inspect `wrapStyle`, Dev Mode CSS `text-wrap` (Tailwind `text-balance` / `text-pretty`), the Type settings control under Vertical trim. Per-paragraph settings, text-style support and the `.fig` import/export mapping stay open. Test: `text_behaviour_tests::balance_and_pretty_wrap_styles_break_lines_as_documented`. |
 | 2026-11-02 | patch | M4: Backspace or Delete at the start of a list item takes its marker and keeps its level ("Use Backspace or Delete at the beginning of a list item to delete the counter, but keep the same level of indentation", Create bulleted and numbered lists): a plain paragraph may now carry a list level, and the text layout starts it where that level's item text starts (the gutters stay even when no list is left). Backspace used to drop the level too, and Delete at an item's start deleted the next character. Tab on such a paragraph types a tab, as outside a list. Tests: `text_tail_tests::list_keys_at_list_items`, text crate `behaviour_tests::a_plain_paragraph_at_a_list_level_starts_where_the_items_text_does` |

From 8da11395e9ed6eea36caff3ff902a6e8bb86e7dc Mon Sep 17 00:00:00 2001
From: Oleksii Sukholita <72558888+aleksei-suholita@users.noreply.github.com>
Date: Thu, 5 Nov 2026 22:08:15 +0100
Subject: [PATCH 40/41] =?UTF-8?q?M3:=20glass=20effects=20take=20variables,?=
 =?UTF-8?q?=20and=20their=20frost=20stays=20within=200=E2=80=93100=20(#188?=
 =?UTF-8?q?6)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* M3: glass effects take variables, and their frost stays within 0–100 (#1885)

Glass's light angle, intensity, refraction, depth, dispersion, frost and
splay bind to number variables, on a layer (`variable.bind`,
`effects/<i>/<field>`, `radius` being the frost) and in an effect style
(`style.bind`), and the Design panel's glass fields take a variable like
the shadow and blur fields. A variable reads as the field shows it:
intensity, refraction, dispersion and splay in percent.

A glass's frost stays within 0–100, the reference tool's range: a larger
frost from an older file draws at 100, and the field, a bound variable and
scaling stop there.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M3: a frost from an older file scales and shows as it draws (#1885)

Review follow-up: a frost saved past 100 draws at 100, so scaling a layer
starts from that (150 halved draws at 50, not 75) and the Design panel's
Frost field shows it. The revision row's binding path escapes its pipes, so
the table keeps three columns.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M3: Dev Mode and .fig export show a frost from an older file as it draws (#1885)

A frost saved before the 0–100 range draws at 100, and the canvas, CSS and
scaling already read it that way, but Dev Mode's Glass row and the .fig
export still read the stored number, so they said 150 where the canvas
shows 100. Both now read the sanitized frost.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Oleksii Sukholita <oleksii.sukholita@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: FredApps <153173854+FredApps@users.noreply.github.com>
---
 ROADMAP.md                                 |  3 +-
 crates/doc/src/effects_tests.rs            | 41 ++++++++++++++++++++++
 crates/doc/src/props.rs                    | 32 +++++++++++++++--
 crates/engine/src/assets/style_vars.rs     |  1 +
 crates/engine/src/binding_lists_tests.rs   | 35 ++++++++++++++++++
 crates/engine/src/cmd/arrange.rs           |  3 +-
 crates/engine/src/cmd/styles.rs            |  7 ++--
 crates/engine/src/dev/devinspect.rs        |  2 +-
 crates/engine/src/effects_tests.rs         | 26 ++++++++++++++
 crates/format/src/fig/export/paint.rs      |  2 +-
 crates/format/src/fig/export_tests.rs      | 19 ++++++++++
 crates/ui-egui/src/field_tests.rs          |  4 +--
 crates/ui-egui/src/panels/right/effects.rs | 36 +++++++++++++------
 docs/components-parity.md                  |  5 +--
 14 files changed, 194 insertions(+), 22 deletions(-)

diff --git a/ROADMAP.md b/ROADMAP.md
index c2aa86c22..abc435b80 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -2,7 +2,7 @@
 
 **Stage: alpha** · next: beta, ~26 points and ~162–292 h away (one Opus 5.5 agent; ~33–67 h wall-clock with 5 agents)
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-30 · **Change:** minor (web host bridge: `?host=parent` or `data-host="page"` hands a page the app's files, documented in the hosting guide; a connector end moved with Cmd/Ctrl held goes on any part of an object, and stays there as the object moves or resizes; a tap on a plugin panel's button keeps what was typed in its fields; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; library analytics list how many layers and files use each style and variable; the Controller menu names each button as PlayStation and Switch controllers do; widgets draw lines and SVG pictures (plugin API 6); a connector end dropped along a side of a shape attaches to that side (#1708); regression tests pin a rounded shape's one-sided stroke and SVG ids and font families without XML-forbidden characters (#1351, #1124); a damaged image is refused with a reason instead of showing as an empty box (#1474); an image copied in another app pastes again on the desktop, and in the browser for the first time (#492); SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the Frame tool's Phone presets have the iPhone 17 family (#1691); Show in folder works in the Flatpak build and selects the file on Linux (#1701); a dashed line starts and ends with a half-length dash, on the canvas and in exports; the Pages, Layers and Assets search fields keep their text in the middle of the field (#1703); a board connector's path can be reshaped by dragging its path handles (#1710); boards have 16 more shapes (arrows, polygons, star, plus and flowchart symbols), in pickers that lay them out in a grid; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a stroke's Custom style takes a dash pattern of any length as a comma-separated list (#1681); a control request can set its own timeout, up to 10 minutes (`timeoutMs`; `figcraft-cli mcp --attach PORT --timeout SECONDS`) (#1696); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the keyboard's Menu key opens the context menu, as Shift+F10 does; an Open link action can open in place of the prototype, with "Open in new tab" off (gap 15); a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; a live session's welcome sends the document compressed to clients that read it, about seven times smaller (#1665); a control request that times out says truthfully whether it was dropped or is still running and will take effect, and only screenshots and input blame the window (#1673); a board keeps earlier votes' results, listed newest first in Results and deleted one at a time; the object a stamp will stick to is outlined while the stamp tool is over it or a stamp is dragged over it, and board objects take no drops (gap 24); a server can list the files shared from it now for everyone who reaches it, Home ▸ Online shows them and their links carry no secret (`team_files`, part of #742); team library analytics count detached instances per component and file (gap 10); skipping the Open link notice by command is saved with the preferences at once (gap 15); a selected connector's bar on a board sets its start and end points, solid or dashed, its weight and any colour (#1596); cells copied from a spreadsheet paste onto a board as a table; a long layer name stays on one line in the Export button and the Dev Mode header, ending with an ellipsis, and no longer covers the Design panel (#1650); with hundreds of layers selected, the Design panel and the selection overlays stop going over the whole selection on every frame, so dragging 648 layers averages about 1.1 ms of UI per frame (#1571); plugin panels show pictures: an `image` control, base64 within 256 KB and 4,096 px a side, named by its label (gap 6); `.fig` connector labels without a saved snapshot are kept, centred on their line (gap 1); a drag moving many layers re-runs only what sits around them, not each layer's bindings, sizing, text and instance checks, on every move (#1571); damaged font tracking table offsets are checked instead of wrapping on 32-bit targets, and font indexing makes its existing offset bounds explicit (#1125); Bosnian (`bs`) draft catalog; text style dedupe is O(spans) via a last-two cache and fingerprint buckets (#1102); pasted layers whose image the clipboard lacks are named and show a placeholder that reads as missing (#1646); paint-style colours on layers pasted from another design app keep their style instead of turning black (#1638); progress docs cleaned of what merges left twice: rows merged into one, repeated status items removed, and `cargo xtask docs` (in `ci`) fails on a repeated table row or status item; a name typed for a variable or collection finds the one with that exact id before one named like it, and stored mode ids, font family variables and the panels' labels read exact ids (#1613); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); `.fig` elbowed and curved connectors without a saved path are routed like board connectors instead of drawn straight (gap 1); every file a command reads whole by path is a regular file within a cap that fits it: documents 16 GiB, placed images 256 MiB, CLI scripts 1 GiB; `figcraft-cli connect publish` publishes a code repository's code connect mappings to a design file (gap 16); while a drag only moves a large selection, its outlines, box, slots, spacing and Design panel values are worked out once and shifted, not rebuilt on every move (#1571); Shift+Cmd/Ctrl+Enter on a selected board shape adds the next shape already joined to it, and goes on typing (#1597); an imported or pasted file finds an installed family under the other names its fonts give it, and with other case and spacing, instead of reporting it missing (#1292); a development example generates figcraft-cli's shell completions and man pages from its clap definitions (part of #1396); `.fig` ZIP image reads share a total byte budget and count skipped images in the import warnings (#1076); German terminology corrections (M10): gradient stops, OpenType stylistic sets and the Home-screen preference; a component set's property rows fit the 240 px right panel: variant values wrap two to a line there and every + and − stays in view; the server key is checked by comparing SHA-256 hashes of the presented and the kept key, as the deployment guide says (#1130); opening a file contacts no team library server it names until you check it (#1097); a hostile server can no longer grow a client's memory with made-up people, and a session remembers a bounded number of deleted layer ids (#1121); `doc.list` gives AI agents and plugins the open files' names, not their paths (#1117); with a large selection, frames where nothing changed reuse the selection's outlines, box and slots and the Design panel's instance and position values instead of working them out again (#1571); team libraries and plugins larger than the 16 MiB download burst can be downloaded again, more slowly (#1089); a batch keeps one undo snapshot, not one per step (#1099); files nested 256 levels deep import on the browser's 1 MB stack (#1101); SVG and PDF exports count pattern sources and the renders they embed from the layer's depth, so one cap bounds a whole export (#1082); an explicit variables file path (`variable.import`, the `variables` of `file.open` and `file.import`) is refused past 256 MiB or when it isn't a regular file, as the sibling `variables.json` already was (part of #1114); joining and leaving a file nobody is editing reads and writes nothing on the server: it stays loaded a minute after everyone leaves (#1074); opening a `.figcraft` file unpacks at most 6 GiB in all (2 GiB in the browser), every area together (#1079); hovering the canvas hit-tests once per pointer move, not on every frame, and moving an auto layout frame no longer lays out its contents again on every move (#1571); `.fig` instance expansion no longer walks variable nodes for every instance or copies every outer override row into each nested instance (#1077); `comment.people` lists names that were only @mentioned, and `comment.next` and `comment.prompt` carry the mentions too (#1415); grid auto-placement looks for free cells a 64-bit word at a time and skips what blocks it, with the same placements (#1083); with the pen out, Enter or a double-click ends the path and edits the vector with the Move tool instead of drawing on (#1430); a recovery copy made while a version is previewed holds the file, not the version shown; a FigJam `.jam` file opens as a board (#1342); the Actions palette offers only commands that run from it, and no second row reading like a menu item: Place image opens the file dialog (#1574); share links can comment: a third access level beside edit and view, whose holder sees the file live and adds, replies to, reacts to and resolves comments but can't change the design; Preferences ▸ Scroll wheel zoom: a mouse wheel zooms the canvas about the pointer and Cmd/Ctrl+wheel scrolls (#1390); `comment.list {mentions}` lists only the threads that @mention a name (#1415); in the browser an internal error that stops the page keeps its unsaved files, which open again on reload (#1123); boolean operations refuse input past their caps, and a boolean group past them draws without its result (#1104); figcraft-cli parses its arguments with clap, following RFC-0012 (#1396); the selection and hover outlines of rounded rectangles and frames follow their corners (#1506); component properties keep the order they were made in when one is renamed, and Make slot asks for the slot's name first (#1536, #1537); the browser build publishes files to a server, so Share ▸ Online and Publish to server work there (#917); the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); SVG import reads `color()` and `color-mix()` colours, with a note and a grey for those it can't (#1550); the portable Windows zip keeps its settings, recovery copies and plugins in `config\` beside the executable, starting with an installed copy's preferences; the window starts on other graphics when its first ones fail before the first frame: Direct3D 12 compiles with FXC and no device compiles wgpu's indirect-validation shaders, then Vulkan, OpenGL and lower requirements on the power-saving GPU (#965, #1438); Thai, Lao, Khmer and Burmese lines break between words (#1219); an AI agent attached over MCP shows where it works (#1416); a manual overlay's position can be dragged on the canvas (#405); one name for live sessions and comments: Preferences ▸ Your name, in the Join dialog too, kept in the browser, and a rename shows at once in the sessions you are in (#1380); requests that change a server's files have a budget per address, the server key's too, and join codes are found by their hash (#1075); the Join dialog shows a join from the click until its file is ready, with Cancel, and a failed join with Try again (#1381); SVG import draws each pattern tile once per scale, within the layer budget (#1080); Vietnamese letters typed with combining marks (decomposed) take one font that has every mark, instead of missing-glyph boxes beside the letter (#1478); comment.list reports each message's @mentions (#1415); mask groups draw only over the area they can paint, and nested isolated layers share one memory budget (#1061); components can't contain their own instances, directly or through other components; `edit.duplicate` returns an id map with `map: true` (#995); the batches kept for reconnecting apps are bounded in bytes by default, and `figcraft-server` takes `max_log_mb` (#1069); MCP and control calls name their document (#998); sibling placement in live sessions searches instead of counting (#1065); an AI agent attached over MCP comments under its own name, with an Agent label (#1414); the instance-swap menus have a search field (#1338); a refused batch's fixes take time linear in the batch (#1063); the connector tool shows the connector it will make while dragging, ends snapping to attach points (#1387); large images on the canvas draw from a smaller copy, so two 16k images no longer lag (#1483); a file's JPEG thumbnail can't crash the home screen (#1491's progressive JPEG check, now shared); `.fig` import: library text styles linked by asset key, and override rows restating a nested level (#1234); `.fig` import keeps the file's saved line breaks while the text and its box are unedited (#1236); Download a missing free font from the Missing fonts window (`font.download`, #754); the web build's wasm back under its 24 MiB gate (#1472); shadows of images with transparent pixels follow their alpha (#1289); Crop image: Object ▸ Crop image, the right-click menu and the image fill row enter crop mode (`image.crop`, #1464); offline Penpot 2.x import/export (#1143); optional batch continue-on-error with per-step outcomes (#1386); the Design panel's sections on one grid (#858); FigJam outer shape outlines and sticky body fallback beside author text (#1341, #1397); images placed at their own size, 2x screenshots in points (#1360); the toolbar on one 32 pt grid, without its Resources button (#1210); M4: zero-length round-capped dashes draw dots; dash expansion uses the existing safety budget; extracted from #1143; Arabic draft catalog; scaled instances keep their scale when their main is rebuilt (#922); .fig embedded images are copied once per blob, not once per hash (#1059); page ruler guides survive save and reopen (#1476); colour picker LCH and OKLCH models; non-ASCII layer names transliterate in code export (#1235); branches in live sessions and branch history entries, gap 17; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; Installed weights of an embedded font family (#1246); `.sketch` import, best effort (Sketch 48 and newer); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, the iteration marks 〱–〵 and the halfwidth parentheses, with behaviour cases for each; Adobe Fonts found on macOS (#298); egui 0.37 hidden-capture deadline contract; Dev Mode measurements kept on the canvas and a read-only layers panel; boards: a board area row and progress entry; community fixes in #507, #510, #529 and #530: auto-save, a text box by dragging, batch step references, removing someone from a live session, Russian and Turkish catalogs reviewed, Czech and Indonesian drafts, the Japanese draft completed, zoom previews, the web clipboard, Alt-drag snapping and Cmd+D repeat, recovery copies, crash and rollback fixes, colour emoji, `.fig` import fixes; earlier changes are in the revision history below) · **Target:** Figma Design (desktop app 126.10.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (glass effects take variables and keep their frost within 0–100; web host bridge: `?host=parent` or `data-host="page"` hands a page the app's files, documented in the hosting guide; a connector end moved with Cmd/Ctrl held goes on any part of an object, and stays there as the object moves or resizes; a tap on a plugin panel's button keeps what was typed in its fields; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; library analytics list how many layers and files use each style and variable; the Controller menu names each button as PlayStation and Switch controllers do; widgets draw lines and SVG pictures (plugin API 6); a connector end dropped along a side of a shape attaches to that side (#1708); regression tests pin a rounded shape's one-sided stroke and SVG ids and font families without XML-forbidden characters (#1351, #1124); a damaged image is refused with a reason instead of showing as an empty box (#1474); an image copied in another app pastes again on the desktop, and in the browser for the first time (#492); SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the Frame tool's Phone presets have the iPhone 17 family (#1691); Show in folder works in the Flatpak build and selects the file on Linux (#1701); a dashed line starts and ends with a half-length dash, on the canvas and in exports; the Pages, Layers and Assets search fields keep their text in the middle of the field (#1703); a board connector's path can be reshaped by dragging its path handles (#1710); boards have 16 more shapes (arrows, polygons, star, plus and flowchart symbols), in pickers that lay them out in a grid; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a stroke's Custom style takes a dash pattern of any length as a comma-separated list (#1681); a control request can set its own timeout, up to 10 minutes (`timeoutMs`; `figcraft-cli mcp --attach PORT --timeout SECONDS`) (#1696); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the keyboard's Menu key opens the context menu, as Shift+F10 does; an Open link action can open in place of the prototype, with "Open in new tab" off (gap 15); a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; a live session's welcome sends the document compressed to clients that read it, about seven times smaller (#1665); a control request that times out says truthfully whether it was dropped or is still running and will take effect, and only screenshots and input blame the window (#1673); a board keeps earlier votes' results, listed newest first in Results and deleted one at a time; the object a stamp will stick to is outlined while the stamp tool is over it or a stamp is dragged over it, and board objects take no drops (gap 24); a server can list the files shared from it now for everyone who reaches it, Home ▸ Online shows them and their links carry no secret (`team_files`, part of #742); team library analytics count detached instances per component and file (gap 10); skipping the Open link notice by command is saved with the preferences at once (gap 15); a selected connector's bar on a board sets its start and end points, solid or dashed, its weight and any colour (#1596); cells copied from a spreadsheet paste onto a board as a table; a long layer name stays on one line in the Export button and the Dev Mode header, ending with an ellipsis, and no longer covers the Design panel (#1650); with hundreds of layers selected, the Design panel and the selection overlays stop going over the whole selection on every frame, so dragging 648 layers averages about 1.1 ms of UI per frame (#1571); plugin panels show pictures: an `image` control, base64 within 256 KB and 4,096 px a side, named by its label (gap 6); `.fig` connector labels without a saved snapshot are kept, centred on their line (gap 1); a drag moving many layers re-runs only what sits around them, not each layer's bindings, sizing, text and instance checks, on every move (#1571); damaged font tracking table offsets are checked instead of wrapping on 32-bit targets, and font indexing makes its existing offset bounds explicit (#1125); Bosnian (`bs`) draft catalog; text style dedupe is O(spans) via a last-two cache and fingerprint buckets (#1102); pasted layers whose image the clipboard lacks are named and show a placeholder that reads as missing (#1646); paint-style colours on layers pasted from another design app keep their style instead of turning black (#1638); progress docs cleaned of what merges left twice: rows merged into one, repeated status items removed, and `cargo xtask docs` (in `ci`) fails on a repeated table row or status item; a name typed for a variable or collection finds the one with that exact id before one named like it, and stored mode ids, font family variables and the panels' labels read exact ids (#1613); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); `.fig` elbowed and curved connectors without a saved path are routed like board connectors instead of drawn straight (gap 1); every file a command reads whole by path is a regular file within a cap that fits it: documents 16 GiB, placed images 256 MiB, CLI scripts 1 GiB; `figcraft-cli connect publish` publishes a code repository's code connect mappings to a design file (gap 16); while a drag only moves a large selection, its outlines, box, slots, spacing and Design panel values are worked out once and shifted, not rebuilt on every move (#1571); Shift+Cmd/Ctrl+Enter on a selected board shape adds the next shape already joined to it, and goes on typing (#1597); an imported or pasted file finds an installed family under the other names its fonts give it, and with other case and spacing, instead of reporting it missing (#1292); a development example generates figcraft-cli's shell completions and man pages from its clap definitions (part of #1396); `.fig` ZIP image reads share a total byte budget and count skipped images in the import warnings (#1076); German terminology corrections (M10): gradient stops, OpenType stylistic sets and the Home-screen preference; a component set's property rows fit the 240 px right panel: variant values wrap two to a line there and every + and − stays in view; the server key is checked by comparing SHA-256 hashes of the presented and the kept key, as the deployment guide says (#1130); opening a file contacts no team library server it names until you check it (#1097); a hostile server can no longer grow a client's memory with made-up people, and a session remembers a bounded number of deleted layer ids (#1121); `doc.list` gives AI agents and plugins the open files' names, not their paths (#1117); with a large selection, frames where nothing changed reuse the selection's outlines, box and slots and the Design panel's instance and position values instead of working them out again (#1571); team libraries and plugins larger than the 16 MiB download burst can be downloaded again, more slowly (#1089); a batch keeps one undo snapshot, not one per step (#1099); files nested 256 levels deep import on the browser's 1 MB stack (#1101); SVG and PDF exports count pattern sources and the renders they embed from the layer's depth, so one cap bounds a whole export (#1082); an explicit variables file path (`variable.import`, the `variables` of `file.open` and `file.import`) is refused past 256 MiB or when it isn't a regular file, as the sibling `variables.json` already was (part of #1114); joining and leaving a file nobody is editing reads and writes nothing on the server: it stays loaded a minute after everyone leaves (#1074); opening a `.figcraft` file unpacks at most 6 GiB in all (2 GiB in the browser), every area together (#1079); hovering the canvas hit-tests once per pointer move, not on every frame, and moving an auto layout frame no longer lays out its contents again on every move (#1571); `.fig` instance expansion no longer walks variable nodes for every instance or copies every outer override row into each nested instance (#1077); `comment.people` lists names that were only @mentioned, and `comment.next` and `comment.prompt` carry the mentions too (#1415); grid auto-placement looks for free cells a 64-bit word at a time and skips what blocks it, with the same placements (#1083); with the pen out, Enter or a double-click ends the path and edits the vector with the Move tool instead of drawing on (#1430); a recovery copy made while a version is previewed holds the file, not the version shown; a FigJam `.jam` file opens as a board (#1342); the Actions palette offers only commands that run from it, and no second row reading like a menu item: Place image opens the file dialog (#1574); share links can comment: a third access level beside edit and view, whose holder sees the file live and adds, replies to, reacts to and resolves comments but can't change the design; Preferences ▸ Scroll wheel zoom: a mouse wheel zooms the canvas about the pointer and Cmd/Ctrl+wheel scrolls (#1390); `comment.list {mentions}` lists only the threads that @mention a name (#1415); in the browser an internal error that stops the page keeps its unsaved files, which open again on reload (#1123); boolean operations refuse input past their caps, and a boolean group past them draws without its result (#1104); figcraft-cli parses its arguments with clap, following RFC-0012 (#1396); the selection and hover outlines of rounded rectangles and frames follow their corners (#1506); component properties keep the order they were made in when one is renamed, and Make slot asks for the slot's name first (#1536, #1537); the browser build publishes files to a server, so Share ▸ Online and Publish to server work there (#917); the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); SVG import reads `color()` and `color-mix()` colours, with a note and a grey for those it can't (#1550); the portable Windows zip keeps its settings, recovery copies and plugins in `config\` beside the executable, starting with an installed copy's preferences; the window starts on other graphics when its first ones fail before the first frame: Direct3D 12 compiles with FXC and no device compiles wgpu's indirect-validation shaders, then Vulkan, OpenGL and lower requirements on the power-saving GPU (#965, #1438); Thai, Lao, Khmer and Burmese lines break between words (#1219); an AI agent attached over MCP shows where it works (#1416); a manual overlay's position can be dragged on the canvas (#405); one name for live sessions and comments: Preferences ▸ Your name, in the Join dialog too, kept in the browser, and a rename shows at once in the sessions you are in (#1380); requests that change a server's files have a budget per address, the server key's too, and join codes are found by their hash (#1075); the Join dialog shows a join from the click until its file is ready, with Cancel, and a failed join with Try again (#1381); SVG import draws each pattern tile once per scale, within the layer budget (#1080); Vietnamese letters typed with combining marks (decomposed) take one font that has every mark, instead of missing-glyph boxes beside the letter (#1478); comment.list reports each message's @mentions (#1415); mask groups draw only over the area they can paint, and nested isolated layers share one memory budget (#1061); components can't contain their own instances, directly or through other components; `edit.duplicate` returns an id map with `map: true` (#995); the batches kept for reconnecting apps are bounded in bytes by default, and `figcraft-server` takes `max_log_mb` (#1069); MCP and control calls name their document (#998); sibling placement in live sessions searches instead of counting (#1065); an AI agent attached over MCP comments under its own name, with an Agent label (#1414); the instance-swap menus have a search field (#1338); a refused batch's fixes take time linear in the batch (#1063); the connector tool shows the connector it will make while dragging, ends snapping to attach points (#1387); large images on the canvas draw from a smaller copy, so two 16k images no longer lag (#1483); a file's JPEG thumbnail can't crash the home screen (#1491's progressive JPEG check, now shared); `.fig` import: library text styles linked by asset key, and override rows restating a nested level (#1234); `.fig` import keeps the file's saved line breaks while the text and its box are unedited (#1236); Download a missing free font from the Missing fonts window (`font.download`, #754); the web build's wasm back under its 24 MiB gate (#1472); shadows of images with transparent pixels follow their alpha (#1289); Crop image: Object ▸ Crop image, the right-click menu and the image fill row enter crop mode (`image.crop`, #1464); offline Penpot 2.x import/export (#1143); optional batch continue-on-error with per-step outcomes (#1386); the Design panel's sections on one grid (#858); FigJam outer shape outlines and sticky body fallback beside author text (#1341, #1397); images placed at their own size, 2x screenshots in points (#1360); the toolbar on one 32 pt grid, without its Resources button (#1210); M4: zero-length round-capped dashes draw dots; dash expansion uses the existing safety budget; extracted from #1143; Arabic draft catalog; scaled instances keep their scale when their main is rebuilt (#922); .fig embedded images are copied once per blob, not once per hash (#1059); page ruler guides survive save and reopen (#1476); colour picker LCH and OKLCH models; non-ASCII layer names transliterate in code export (#1235); branches in live sessions and branch history entries, gap 17; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; Installed weights of an embedded font family (#1246); `.sketch` import, best effort (Sketch 48 and newer); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, the iteration marks 〱–〵 and the halfwidth parentheses, with behaviour cases for each; Adobe Fonts found on macOS (#298); egui 0.37 hidden-capture deadline contract; Dev Mode measurements kept on the canvas and a read-only layers panel; boards: a board area row and progress entry; community fixes in #507, #510, #529 and #530: auto-save, a text box by dragging, batch step references, removing someone from a live session, Russian and Turkish catalogs reviewed, Czech and Indonesian drafts, the Japanese draft completed, zoom previews, the web clipboard, Alt-drag snapping and Cmd+D repeat, recovery copies, crash and rollback fixes, colour emoji, `.fig` import fixes; earlier changes are in the revision history below) · **Target:** Figma Design (desktop app 126.10.7)
 
 FigCraft is a clean-room, open-source, pure-Rust reimplementation of the Figma design workflow,
 native on macOS, Windows, Linux and FreeBSD and in the browser, fully drivable by agents through
@@ -358,6 +358,7 @@ Ranked; detail and milestones in [`docs/roadmap.md`](docs/roadmap.md).
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-02 | minor | M3, #1885: glass effects take variables (light angle, intensity, refraction, depth, dispersion, frost and splay, on layers and in effect styles, and from the Design panel's glass fields), and a glass's frost stays within 0–100, the reference tool's range: a larger frost from an older file draws at 100, and the field, a bound variable and scaling stop there. Numbers unchanged |
 | 2026-10-31 | minor | M12: as the help describes, holding Cmd/Ctrl while moving a connector's end places it on any part of an object instead of snapping to a side. It keeps that spot as a fraction of the object's box, so it follows the object when it moves or resizes, and without the key an end snaps as before. `board.connector {fromAt, toAt}` and `board.reattach {at}` take it; saved only when set. Numbers unchanged |
 | 2026-10-31 | patch | M11: a trackpad or touch tap sends its press and release in one frame, so a plugin panel's field committed in the frame its button was clicked and the value was lost: the Counter's Set count… kept the old count. The plugin now gets both, the field's value first. The `window.figcraft` docs name `screenshot`'s `data`. Numbers unchanged |
 | 2026-10-31 | patch | M4: Dash and Custom strokes have a Dash cap (None, Round, Square) in the advanced stroke settings and `node.set {dashCap}`, on both ends of every dash on the canvas and in PNG, PDF and SVG. Unset, dashes keep taking the end point caps, so older files look the same; the saved file writes it only when set. Numbers unchanged |
diff --git a/crates/doc/src/effects_tests.rs b/crates/doc/src/effects_tests.rs
index 0ef39c851..f1676f2dd 100644
--- a/crates/doc/src/effects_tests.rs
+++ b/crates/doc/src/effects_tests.rs
@@ -49,6 +49,47 @@ fn glass_values_are_clamped_and_reach_their_backdrop() {
     assert_eq!(hidden.backdrop_radius(), 0.0);
 }
 
+#[test]
+fn glass_frost_stays_within_the_reference_range() {
+    // A file from before the 0–100 range draws its frost at 100, and reaches no further.
+    let g = Glass { frost: 150.0, ..Glass::default() };
+    assert_eq!(g.sanitized().frost, Glass::MAX_FROST);
+    let e = Effect { kind: EffectKind::Glass(g), visible: true };
+    let capped = Effect { kind: EffectKind::Glass(Glass { frost: Glass::MAX_FROST, ..Glass::default() }), visible: true };
+    assert_eq!(e.backdrop_radius(), capped.backdrop_radius());
+}
+
+#[test]
+fn glass_fields_take_bound_numbers_as_the_panel_shows_them() {
+    let mut g = Glass::default();
+    for (field, x) in [
+        ("lightAngle", 30.0),
+        ("lightIntensity", 25.0),
+        ("refraction", 40.0),
+        ("depth", 12.0),
+        ("dispersion", 10.0),
+        ("radius", 8.0),
+        ("splay", 50.0),
+    ] {
+        assert!(g.set_bound(field, x), "{field}");
+    }
+    assert_eq!((g.light_angle, g.light_intensity, g.refraction, g.depth, g.dispersion, g.frost, g.splay), (30.0, 0.25, 0.4, 12.0, 0.1, 8.0, 0.5));
+    // Out of range: clamped to the field's range.
+    for (field, x) in [("lightAngle", 270.0), ("lightIntensity", 250.0), ("depth", 0.0), ("radius", 150.0), ("splay", -5.0)] {
+        assert!(g.set_bound(field, x), "{field}");
+    }
+    assert_eq!((g.light_angle, g.light_intensity, g.depth, g.frost, g.splay), (180.0, 1.0, 1.0, Glass::MAX_FROST, 0.0));
+    // A field glass doesn't have, or a value that isn't a number, changes nothing.
+    let before = g.clone();
+    assert!(!g.set_bound("spread", 3.0));
+    assert!(!g.set_bound("splay", f64::NAN));
+    assert!(!g.set_bound("depth", f64::INFINITY));
+    assert_eq!(g, before);
+    for field in Glass::BOUND_FIELDS {
+        assert!(Glass::default().set_bound(field, 1.0), "{field}");
+    }
+}
+
 #[test]
 fn effect_colours() {
     let mut e = Effect::noise();
diff --git a/crates/doc/src/props.rs b/crates/doc/src/props.rs
index 0c78681f2..242ce3d11 100644
--- a/crates/doc/src/props.rs
+++ b/crates/doc/src/props.rs
@@ -660,7 +660,7 @@ pub struct Glass {
     pub depth: f64,
     /// Colour splitting along the curved edge (0–1).
     pub dispersion: f64,
-    /// Blur of the backdrop (a blur radius, document units).
+    /// Blur of the backdrop (a blur radius, document units, 0–[`Self::MAX_FROST`]).
     pub frost: f64,
     /// How widely the light spreads over the glass (0–1).
     pub splay: f64,
@@ -673,6 +673,34 @@ impl Default for Glass {
 }
 
 impl Glass {
+    /// The most frost a glass takes, as the reference tool's Frost field (0–100).
+    pub const MAX_FROST: f64 = 100.0;
+
+    /// The fields a variable binds on a glass effect (`effects/<i>/<field>`), see [`Self::set_bound`].
+    pub const BOUND_FIELDS: [&'static str; 7] = ["lightAngle", "lightIntensity", "refraction", "depth", "dispersion", "radius", "splay"];
+
+    /// Sets `field` (one of [`Self::BOUND_FIELDS`]) from a bound number variable, read as the
+    /// Design panel's field shows it: intensity, refraction, dispersion and splay in percent, the
+    /// frost as `radius`, each clamped to the field's range. False for a field glass doesn't have
+    /// or a value that isn't finite (nothing changes).
+    pub fn set_bound(&mut self, field: &str, x: f64) -> bool {
+        if !x.is_finite() {
+            return false;
+        }
+        let pct = (x / 100.0).clamp(0.0, 1.0);
+        match field {
+            "lightAngle" => self.light_angle = x.clamp(-180.0, 180.0),
+            "lightIntensity" => self.light_intensity = pct,
+            "refraction" => self.refraction = pct,
+            "depth" => self.depth = x.clamp(1.0, 1000.0),
+            "dispersion" => self.dispersion = pct,
+            "radius" => self.frost = x.clamp(0.0, Self::MAX_FROST),
+            "splay" => self.splay = pct,
+            _ => return false,
+        }
+        true
+    }
+
     /// The values clamped to their ranges (non-finite ones at their defaults).
     pub fn sanitized(&self) -> Glass {
         let d = Glass::default();
@@ -683,7 +711,7 @@ impl Glass {
             refraction: ok(self.refraction, d.refraction, 0.0, 1.0),
             depth: ok(self.depth, d.depth, 1.0, 1000.0),
             dispersion: ok(self.dispersion, d.dispersion, 0.0, 1.0),
-            frost: ok(self.frost, d.frost, 0.0, 1000.0),
+            frost: ok(self.frost, d.frost, 0.0, Self::MAX_FROST),
             splay: ok(self.splay, d.splay, 0.0, 1.0),
         }
     }
diff --git a/crates/engine/src/assets/style_vars.rs b/crates/engine/src/assets/style_vars.rs
index 7fb30fd06..1fea32bf4 100644
--- a/crates/engine/src/assets/style_vars.rs
+++ b/crates/engine/src/assets/style_vars.rs
@@ -33,6 +33,7 @@ pub fn field_type(kind: &StyleKind, key: &str) -> Option<VariableType> {
             (EffectKind::DropShadow(_) | EffectKind::InnerShadow(_), "color") => Some(Color),
             (EffectKind::DropShadow(_) | EffectKind::InnerShadow(_), "radius" | "spread" | "offsetX" | "offsetY") => Some(Number),
             (EffectKind::LayerBlur(_) | EffectKind::BackgroundBlur(_), "radius" | "startRadius") => Some(Number),
+            (EffectKind::Glass(_), f) if figcraft_doc::Glass::BOUND_FIELDS.contains(&f) => Some(Number),
             _ => None,
         },
         (StyleKind::Grid { grids }, Some((BoundList::Grids, i, "size" | "count" | "gutter" | "offset"))) => grids.get(i).map(|_| Number),
diff --git a/crates/engine/src/binding_lists_tests.rs b/crates/engine/src/binding_lists_tests.rs
index 8b221efdd..cddd6bbcb 100644
--- a/crates/engine/src/binding_lists_tests.rs
+++ b/crates/engine/src/binding_lists_tests.rs
@@ -98,6 +98,41 @@ fn effect_moves_and_removals_reject_junk() {
     assert_eq!(s.doc().unwrap().node(r).unwrap().effects.len(), 1);
 }
 
+fn glass(s: &Session, r: NodeId) -> figcraft_doc::Glass {
+    match s.doc().unwrap().node(r).unwrap().effects.first().map(|e| &e.kind) {
+        Some(EffectKind::Glass(g)) => g.clone(),
+        k => panic!("{k:?}"),
+    }
+}
+
+#[test]
+fn glass_fields_take_number_variables() {
+    let (mut s, r) = setup();
+    ex(&mut s, "effect.add", json!({"ids": [r], "type": "glass"}));
+    // Percent fields read the variable as the Design panel shows them; `radius` is the frost.
+    ex(&mut s, "variable.bind", json!({"ids": [r], "field": "effects/0/splay", "variable": "large"}));
+    ex(&mut s, "variable.bind", json!({"ids": [r], "field": "effects/0/radius", "variable": "small"}));
+    ex(&mut s, "variable.bind", json!({"ids": [r], "field": "effects/0/depth", "variable": "large"}));
+    let g = glass(&s, r);
+    assert_eq!((g.splay, g.frost, g.depth), (0.3, 2.0, 30.0));
+    // A new value follows, clamped to the field's range (frost stops at 100).
+    ex(&mut s, "variable.set", json!({"variable": "small", "value": 150}));
+    ex(&mut s, "variable.set", json!({"variable": "large", "value": 75}));
+    let g = glass(&s, r);
+    assert_eq!((g.splay, g.frost, g.depth), (0.75, figcraft_doc::Glass::MAX_FROST, 75.0));
+    // A colour variable doesn't fit a glass field.
+    assert!(s.execute("variable.bind", &json!({"ids": [r], "field": "effects/0/refraction", "variable": "brand"})).is_err());
+    // An effect style binds them too, and every layer using it follows.
+    let fx = ex_value(&mut s, "style.create", json!({"type": "effect", "name": "Pane", "from": r}))["id"].as_str().unwrap().to_string();
+    ex(&mut s, "style.bind", json!({"style": fx, "field": "effects/0/refraction", "variable": "large"}));
+    assert_eq!(glass(&s, r).refraction, 0.75);
+    assert!(s.execute("style.bind", &json!({"style": fx, "field": "effects/0/spread", "variable": "large"})).is_err(), "glass has no spread");
+}
+
+fn ex_value(s: &mut Session, cmd: &str, p: serde_json::Value) -> serde_json::Value {
+    s.execute(cmd, &p).unwrap_or_else(|e| panic!("{cmd}: {e}"))
+}
+
 fn fill_hex(s: &Session, r: NodeId) -> Vec<String> {
     s.doc().unwrap().node(r).unwrap().fills.iter().filter_map(|p| p.solid_color()).map(|c| c.to_hex()).collect()
 }
diff --git a/crates/engine/src/cmd/arrange.rs b/crates/engine/src/cmd/arrange.rs
index b90cf1d1f..88146ea95 100644
--- a/crates/engine/src/cmd/arrange.rs
+++ b/crates/engine/src/cmd/arrange.rs
@@ -465,7 +465,8 @@ pub fn scale_node(doc: &mut Document, id: NodeId, k: f64) -> Result<()> {
                 }
                 EffectKind::Glass(g) => {
                     g.depth *= k;
-                    g.frost *= k;
+                    // From the frost it draws with (an older file's past 100 draws at 100).
+                    g.frost = (g.sanitized().frost * k).min(figcraft_doc::Glass::MAX_FROST);
                 }
             }
         }
diff --git a/crates/engine/src/cmd/styles.rs b/crates/engine/src/cmd/styles.rs
index 99d4521e4..0bd43e388 100644
--- a/crates/engine/src/cmd/styles.rs
+++ b/crates/engine/src/cmd/styles.rs
@@ -53,7 +53,7 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!(
             "style.bind",
             "Bind variable in style",
-            "{style, field, variable? (id or name; none: unbind)}  bind a variable to a field of the style's value: a paint style's `fills/<i>/color` (or `fill`: its first paint) and `fills/<i>/stops/<j>/color`, an effect style's `effects/<i>/<color|radius|spread|offsetX|offsetY|startRadius>`, a grid style's `layoutGrids/<i>/<size|count|gutter|offset>`, a text style's `fontSize|lineHeight|letterSpacing` (numbers, px) and `fontFamily|fontStyle` (strings). Every layer using the style shows the field resolved in its own modes; the style keeps it resolved in the default modes",
+            "{style, field, variable? (id or name; none: unbind)}  bind a variable to a field of the style's value: a paint style's `fills/<i>/color` (or `fill`: its first paint) and `fills/<i>/stops/<j>/color`, an effect style's `effects/<i>/<color|radius|spread|offsetX|offsetY|startRadius>` (glass: `lightAngle|lightIntensity|refraction|depth|dispersion|radius|splay`), a grid style's `layoutGrids/<i>/<size|count|gutter|offset>`, a text style's `fontSize|lineHeight|letterSpacing` (numbers, px) and `fontFamily|fontStyle` (strings). Every layer using the style shows the field resolved in its own modes; the style keeps it resolved in the default modes",
             true,
             bind_style
         ),
@@ -196,7 +196,7 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!(
             "variable.bind",
             "Bind variable",
-            "{ids?, field (fill|stroke (first paint)|fills/<i>/color|strokes/<i>/color|fills/<i>/stops/<j>/color (gradient stops)|effects/<i>/<offsetX|offsetY|radius|startRadius|spread|color>|layoutGrids/<i>/<size|count|gutter|offset>|componentProperties/<name> (instances: boolean/text properties; variant properties take string variables naming a value)|width|height|opacity (percent)|cornerRadius|gap|paddingHorizontal|characters|visible|fontSize…; list indices bottom first), variable (null unbinds)}",
+            "{ids?, field (fill|stroke (first paint)|fills/<i>/color|strokes/<i>/color|fills/<i>/stops/<j>/color (gradient stops)|effects/<i>/<offsetX|offsetY|radius|startRadius|spread|color|lightAngle|lightIntensity|refraction|depth|dispersion|splay> (glass: `radius` is its frost; intensity, refraction, dispersion and splay in percent)|layoutGrids/<i>/<size|count|gutter|offset>|componentProperties/<name> (instances: boolean/text properties; variant properties take string variables naming a value)|width|height|opacity (percent)|cornerRadius|gap|paddingHorizontal|characters|visible|fontSize…; list indices bottom first), variable (null unbinds)}",
             true,
             bind
         ),
@@ -1304,6 +1304,9 @@ pub(crate) fn set_effect_field(effects: &mut [Effect], i: usize, prop: &str, val
         (EffectKind::DropShadow(s) | EffectKind::InnerShadow(s), "color", _, VariableValue::Color(c)) => s.color = *c,
         (EffectKind::LayerBlur(b) | EffectKind::BackgroundBlur(b), "radius", Some(x), _) => b.radius = x.max(0.0),
         (EffectKind::LayerBlur(b) | EffectKind::BackgroundBlur(b), "startRadius", Some(x), _) => b.start_radius = x.max(0.0),
+        (EffectKind::Glass(g), field, Some(x), _) => {
+            g.set_bound(field, x);
+        }
         _ => {}
     }
 }
diff --git a/crates/engine/src/dev/devinspect.rs b/crates/engine/src/dev/devinspect.rs
index e646e53f4..3daf7d1b0 100644
--- a/crates/engine/src/dev/devinspect.rs
+++ b/crates/engine/src/dev/devinspect.rs
@@ -475,7 +475,7 @@ pub fn properties_with(doc: &Document, id: NodeId, fmt: ColorFormat) -> Vec<Sect
                     pct(g.refraction),
                     num(g.depth),
                     pct(g.dispersion),
-                    num(g.frost),
+                    num(g.sanitized().frost),
                     pct(g.splay)
                 ),
             ),
diff --git a/crates/engine/src/effects_tests.rs b/crates/engine/src/effects_tests.rs
index 607b77114..a011b7a32 100644
--- a/crates/engine/src/effects_tests.rs
+++ b/crates/engine/src/effects_tests.rs
@@ -95,6 +95,32 @@ fn scaling_scales_grain_and_glass() {
     assert_eq!((g.refraction, nz.density), (d.refraction, 0.5));
 }
 
+#[test]
+fn scaling_a_frost_from_an_older_file_starts_from_what_it_draws() {
+    // A frost of 150, saved before the 0–100 range, draws at 100: halved, it draws at 50.
+    let mut s = Session::new();
+    let r = rect(&mut s);
+    s.execute("effect.add", &json!({"ids": [r], "type": "glass"})).unwrap();
+    s.execute("effect.set", &json!({"ids": [r], "index": 0, "effect": {"type": "glass", "frost": 150}})).unwrap();
+    s.execute("transform.scale", &json!({"ids": [r], "factor": 0.5})).unwrap();
+    let EffectKind::Glass(g) = &s.doc().unwrap().node(r).unwrap().effects[0].kind else { panic!() };
+    assert_eq!(g.frost, 50.0);
+}
+
+#[test]
+fn inspect_shows_a_frost_from_an_older_file_as_it_draws() {
+    // A frost of 150, saved before the 0–100 range, draws at 100: Dev Mode says 100 as CSS does.
+    let mut s = Session::new();
+    let r = rect(&mut s);
+    s.execute("effect.add", &json!({"ids": [r], "type": "glass"})).unwrap();
+    s.execute("effect.set", &json!({"ids": [r], "index": 0, "effect": {"type": "glass", "frost": 150}})).unwrap();
+    let doc = s.doc().unwrap();
+    let sections = crate::devinspect::properties(doc, r);
+    let glass = &sections.iter().find(|s| s.title == "Effects").unwrap().rows[0];
+    assert!(glass.value.contains(" frost 100 "), "{}", glass.value);
+    assert!(code_for(doc, r, CodeLang::Css).contains("backdrop-filter: blur(50px);"));
+}
+
 #[test]
 fn inspect_and_css_show_the_new_effects() {
     let mut s = Session::new();
diff --git a/crates/format/src/fig/export/paint.rs b/crates/format/src/fig/export/paint.rs
index 26718e44f..2bb62ae2f 100644
--- a/crates/format/src/fig/export/paint.rs
+++ b/crates/format/src/fig/export/paint.rs
@@ -234,7 +234,7 @@ impl<'d> Exporter<'d> {
             }
             EffectKind::Glass(g) => {
                 self.warn("glass effects keep only their frost");
-                f.extend([("type", e("GLASS")), ("radius", fl(g.frost))]);
+                f.extend([("type", e("GLASS")), ("radius", fl(g.sanitized().frost))]);
             }
         }
         o(f)
diff --git a/crates/format/src/fig/export_tests.rs b/crates/format/src/fig/export_tests.rs
index f3d7ac06f..79671a39c 100644
--- a/crates/format/src/fig/export_tests.rs
+++ b/crates/format/src/fig/export_tests.rs
@@ -1243,6 +1243,25 @@ fn local_samples_round_trip() {
     }
 }
 
+#[test]
+fn a_glass_frost_is_written_as_it_draws() {
+    // A frost saved before the 0–100 range (or not a number) is written at what it draws: 100, or
+    // the default.
+    for (frost, written) in [(12.0, 12.0), (500.0, Glass::MAX_FROST), (f64::NAN, Glass::default().frost)] {
+        let mut doc = Document::new("glass");
+        let page = doc.first_page().unwrap();
+        let r = doc.create(page, NodeKind::Rectangle, "Pane", 0.0, 0.0, 24.0, 24.0).unwrap();
+        doc.get_mut(r).unwrap().effects = vec![Effect { kind: EffectKind::Glass(Glass { frost, ..Glass::default() }), visible: true }];
+        let (bytes, _) = export(&doc, None).unwrap();
+        let archive = Archive::open(&bytes).unwrap();
+        let (schema, message) = decode_canvas(&archive.canvas).unwrap();
+        let msg = schema.decode_message(schema.find("Message").unwrap(), &message).unwrap();
+        let pane = msg.get("nodeChanges").unwrap().list().iter().find(|nc| nc.get("name").and_then(Kv::str) == Some("Pane")).unwrap();
+        let radius = pane.get("effects").unwrap().list()[0].get("radius").and_then(Kv::f64).unwrap();
+        assert_eq!(radius, written, "frost {frost}");
+    }
+}
+
 #[test]
 fn a_vector_drawable_export_setting_is_written_as_svg_with_a_warning() {
     let mut doc = Document::new("vd");
diff --git a/crates/ui-egui/src/field_tests.rs b/crates/ui-egui/src/field_tests.rs
index 566f0828b..49b8a94b7 100644
--- a/crates/ui-egui/src/field_tests.rs
+++ b/crates/ui-egui/src/field_tests.rs
@@ -667,11 +667,11 @@ fn the_glass_light_intensity_field_has_a_label() {
     u.ctx.data_mut(|d| d.insert_temp(Id::unique(("fx_open", 0usize)), true));
     u.frame(vec![]);
     let shapes = u.frame_output(vec![]).shapes;
-    let lead = u.ctx.read_response(Id::unique(("fx_gi", 0usize)).with("lead")).expect("the intensity field is shown").rect;
+    let lead = u.ctx.read_response(Id::unique(("fx", "lightIntensity", 0usize)).with("lead")).expect("the intensity field is shown").rect;
     let labels: Vec<(String, bool)> =
         painted_texts(&shapes).into_iter().filter(|(_, _, at)| lead.contains(at.center())).map(|(text, cut, _)| (text, cut)).collect();
     assert_eq!(labels, [("Intensity".to_string(), false)], "labelled, and not cut short");
-    let field = u.ctx.read_response(Id::unique(("fx_gi", 0usize)).with("field")).expect("its value").rect;
+    let field = u.ctx.read_response(Id::unique(("fx", "lightIntensity", 0usize)).with("field")).expect("its value").rect;
     assert_eq!(field.max.x - lead.min.x, GLASS_FIELD_W, "the width the next test measures against");
 }
 
diff --git a/crates/ui-egui/src/panels/right/effects.rs b/crates/ui-egui/src/panels/right/effects.rs
index 528d19bfd..b25990db7 100644
--- a/crates/ui-egui/src/panels/right/effects.rs
+++ b/crates/ui-egui/src/panels/right/effects.rs
@@ -108,7 +108,22 @@ pub(crate) fn effect_open(ctx: &egui::Context, i: usize) -> bool {
 
 /// A number field of effect `i` that can be bound to a variable (`effects/<i>/<prop>`).
 fn fx_field(app: &mut FigApp, ui: &mut Ui, ids: &[NodeId], i: usize, prop: &str, lead: Lead, value: f64, width: f32) -> Option<FieldEdit> {
-    crate::variable_ui::number_field(app, ui, ids, &format!("effects/{i}/{prop}"), Id::unique(("fx", prop, i)), lead, Some(value), "", width)
+    fx_field_in(app, ui, ids, i, prop, lead, Some(value), "", width)
+}
+
+/// [`fx_field`] showing `value` as given (a glass percentage) with `suffix` after it.
+fn fx_field_in(
+    app: &mut FigApp,
+    ui: &mut Ui,
+    ids: &[NodeId],
+    i: usize,
+    prop: &str,
+    lead: Lead,
+    value: Option<f64>,
+    suffix: &str,
+    width: f32,
+) -> Option<FieldEdit> {
+    crate::variable_ui::number_field(app, ui, ids, &format!("effects/{i}/{prop}"), Id::unique(("fx", prop, i)), lead, value, suffix, width)
 }
 
 /// Draw type-specific effect fields for shadows, blurs, noise, texture and glass, using live
@@ -290,29 +305,30 @@ fn effect_settings(app: &mut FigApp, ui: &mut Ui, ids: &[NodeId], i: usize, e: &
                     }
                 })
             };
+            // Each field takes a variable (`effects/<i>/<field>`), read as the field shows it:
+            // percentages for the 0–1 values, and the frost as `radius` (see `Glass::set_bound`).
             let pct = |v: f64| Some((v * 100.0).round());
             let unit = |v: f64| (v / 100.0).clamp(0.0, 1.0);
             row(ui, 32.0, |ui| {
-                let ed =
-                    widgets::number_field(ui, Id::unique(("fx_gl", i)), Lead::Text(tr("Light|glass")), Some(g.light_angle.round()), "°", half, 1.0);
+                let ed = fx_field_in(app, ui, ids, i, "lightAngle", Lead::Text(tr("Light|glass")), Some(g.light_angle.round()), "°", half);
                 edit(app, ed, &|v| with(&|gl| gl.light_angle = v.clamp(-180.0, 180.0)));
-                let ed = widgets::number_field(ui, Id::unique(("fx_gi", i)), Lead::Text(tr("Intensity")), pct(g.light_intensity), "%", half, 1.0);
+                let ed = fx_field_in(app, ui, ids, i, "lightIntensity", Lead::Text(tr("Intensity")), pct(g.light_intensity), "%", half);
                 edit(app, ed, &|v| with(&|gl| gl.light_intensity = unit(v)));
             });
             row(ui, 32.0, |ui| {
-                let ed = widgets::number_field(ui, Id::unique(("fx_gr", i)), Lead::Text(tr("Refraction")), pct(g.refraction), "%", half, 1.0);
+                let ed = fx_field_in(app, ui, ids, i, "refraction", Lead::Text(tr("Refraction")), pct(g.refraction), "%", half);
                 edit(app, ed, &|v| with(&|gl| gl.refraction = unit(v)));
-                let ed = widgets::number_field(ui, Id::unique(("fx_gd", i)), Lead::Text(tr("Depth")), Some(g.depth), "", half, 1.0);
+                let ed = fx_field_in(app, ui, ids, i, "depth", Lead::Text(tr("Depth")), Some(g.depth), "", half);
                 edit(app, ed, &|v| with(&|gl| gl.depth = v.clamp(1.0, 1000.0)));
             });
             row(ui, 32.0, |ui| {
-                let ed = widgets::number_field(ui, Id::unique(("fx_gs", i)), Lead::Text(tr("Dispersion")), pct(g.dispersion), "%", half, 1.0);
+                let ed = fx_field_in(app, ui, ids, i, "dispersion", Lead::Text(tr("Dispersion")), pct(g.dispersion), "%", half);
                 edit(app, ed, &|v| with(&|gl| gl.dispersion = unit(v)));
-                let ed = widgets::number_field(ui, Id::unique(("fx_gf", i)), Lead::Text(tr("Frost")), Some(g.frost), "", half, 1.0);
-                edit(app, ed, &|v| with(&|gl| gl.frost = v.clamp(0.0, 1000.0)));
+                let ed = fx_field_in(app, ui, ids, i, "radius", Lead::Text(tr("Frost")), Some(g.sanitized().frost), "", half);
+                edit(app, ed, &|v| with(&|gl| gl.frost = v.clamp(0.0, Glass::MAX_FROST)));
             });
             row(ui, 32.0, |ui| {
-                let ed = widgets::number_field(ui, Id::unique(("fx_gp", i)), Lead::Text(tr("Splay")), pct(g.splay), "%", half, 1.0);
+                let ed = fx_field_in(app, ui, ids, i, "splay", Lead::Text(tr("Splay")), pct(g.splay), "%", half);
                 edit(app, ed, &|v| with(&|gl| gl.splay = unit(v)));
             });
         }
diff --git a/docs/components-parity.md b/docs/components-parity.md
index 0e3248248..94a579758 100644
--- a/docs/components-parity.md
+++ b/docs/components-parity.md
@@ -1,6 +1,6 @@
 # Components, variants, styles and variables parity
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-01 · **Change:** minor (Delete on a layer inside an instance hides it as an override instead of being refused, as the help center says: "Figma will only toggle the layer's visibility instead of removing it"; library analytics list how many layers and files use each style and variable; SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; a typed or stored variable, collection or mode id names only the object with that id (#1613); colour variables can be calculated from other colours per mode — `{alpha}` replaces a colour's alpha, `{mix}` blends two — and follow them (#1280); stored variable and collection references keep their identity when another object is named like their id (follow-up to #1542); a component set's property rows fit the 240 px right panel: variant values wrap two to a line there and every + and − stays in view; opening a file contacts no team library server it names until you check it (#1097); an explicit variables file path (`variable.import`, the `variables` of `file.open` and `file.import`) is refused past 256 MiB or when it isn't a regular file, as the sibling `variables.json` already was (part of #1114); component properties keep the order they were made in when one is renamed, and Make slot asks for the slot's name first (#1536, #1537); components can't contain their own instances, directly or through others (#1084); the instance-swap menus have a search field (#1338); an instance-swap property's default menu scrolls (#1338); variables on a text style's fields from the style editor; instance-swap properties in the component playground; duplicating or Alt-dragging a main component makes an instance of it (#892); a bound colour variable's alpha applies once (#802); variables import reads `variables` outside `meta` and warns when it imports none (#790); variant properties reorder by drag; library files saved right after a read are read again; Hide when publishing note corrected; size and resizing overrides of layers inside instances (#731); variables export in the browser as a download; core editor leftovers: component playground, variables inside styles; layers and assets panels behaviour suite and fixes; extended collections tail; styles and variables behaviour suite and fixes; components behaviour suite and fixes; team libraries on the server, library usage and swapping a library; extended collections, variables import/export, gradient stops and variant properties bound to variables) · **Target:** Figma Design (desktop app 126.10.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (glass effects take variables; Delete on a layer inside an instance hides it as an override instead of being refused, as the help center says: "Figma will only toggle the layer's visibility instead of removing it"; library analytics list how many layers and files use each style and variable; SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; a typed or stored variable, collection or mode id names only the object with that id (#1613); colour variables can be calculated from other colours per mode — `{alpha}` replaces a colour's alpha, `{mix}` blends two — and follow them (#1280); stored variable and collection references keep their identity when another object is named like their id (follow-up to #1542); a component set's property rows fit the 240 px right panel: variant values wrap two to a line there and every + and − stays in view; opening a file contacts no team library server it names until you check it (#1097); an explicit variables file path (`variable.import`, the `variables` of `file.open` and `file.import`) is refused past 256 MiB or when it isn't a regular file, as the sibling `variables.json` already was (part of #1114); component properties keep the order they were made in when one is renamed, and Make slot asks for the slot's name first (#1536, #1537); components can't contain their own instances, directly or through others (#1084); the instance-swap menus have a search field (#1338); an instance-swap property's default menu scrolls (#1338); variables on a text style's fields from the style editor; instance-swap properties in the component playground; duplicating or Alt-dragging a main component makes an instance of it (#892); a bound colour variable's alpha applies once (#802); variables import reads `variables` outside `meta` and warns when it imports none (#790); variant properties reorder by drag; library files saved right after a read are read again; Hide when publishing note corrected; size and resizing overrides of layers inside instances (#731); variables export in the browser as a download; core editor leftovers: component playground, variables inside styles; layers and assets panels behaviour suite and fixes; extended collections tail; styles and variables behaviour suite and fixes; components behaviour suite and fixes; team libraries on the server, library usage and swapping a library; extended collections, variables import/export, gradient stops and variant properties bound to variables) · **Target:** Figma Design (desktop app 126.10.7)
 
 Design systems are why teams adopt Figma. **Components: breadth ~96%, ready ~72%. Styles and
 variables: breadth ~95%, ready ~76% (estimated).** QA'd with a synthetic design system of ~300
@@ -67,7 +67,7 @@ updates with overrides kept: `library_tests.rs`, `components_scale_tests.rs`.
 | Modes: add, duplicate, rename, delete, set as default / reorder | done | layers on Auto follow a new default; explicit modes stay |
 | Deleting a bound variable or its collection | done | layers keep their last value and are unbound; aliases to it take its values and colour calculations reading it keep the colour they show |
 | Code syntax per platform (Web, iOS, Android) | done | generated CSS uses the Web name, SwiftUI the iOS one and Compose the Android one (a variable without one keeps its value there); in the variables JSON; ArkUI and Flutter have no platform of their own and write values |
-| Bindings: fills, strokes, effects, opacity, padding, gaps, sizes, radius, font family/style, font size/weight, line height, letter spacing, paragraph spacing/indent, text, visibility, layout grids, instance properties | done | type-checked per field; number variables fill text content; the Design panel's font family and font style menus start with Apply variable (string variables), and a bound one shows its variable in place of the menu; a colour variable bound to a solid paint brings its whole colour, alpha included, once (the paint's opacity restarts at 100% on binding, an opacity set while bound multiplies on top; unbinding moves the alpha back into the opacity) |
+| Bindings: fills, strokes, effects, opacity, padding, gaps, sizes, radius, font family/style, font size/weight, line height, letter spacing, paragraph spacing/indent, text, visibility, layout grids, instance properties | done | type-checked per field; glass fields too (light angle, intensity, refraction, depth, dispersion, frost and splay, percentages as the Design panel shows them); number variables fill text content; the Design panel's font family and font style menus start with Apply variable (string variables), and a bound one shows its variable in place of the menu; a colour variable bound to a solid paint brings its whole colour, alpha included, once (the paint's opacity restarts at 100% on binding, an opacity set while bound multiplies on top; unbinding moves the alpha back into the opacity) |
 | Explicit modes per frame, library collections' modes | done | stored variable and collection references resolve by exact id in export, library copies and swaps, imported aliases, alias deletion and cycle checks, Dev Inspect, the library mode picker and prototype playback; a collection or variable named like another's id no longer stands in for it there |
 | Gradient stops and variant properties bound to variables | done | a stop's binding follows it when earlier stops are removed |
 | Extended collections | done | this file's collections (Extend collection on a collection's row; following its edits at once, chains included) and library collections, including a library's own extended collections (chains through libraries); overrides per mode with reset; follow library updates, variables new to the library collection being an update of their own; modes inherited. Checked with synthetic libraries only ([gaps](gaps.md) #14) |
@@ -78,6 +78,7 @@ updates with overrides kept: `library_tests.rs`, `components_scale_tests.rs`.
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-02 | minor | M3, #1885: glass effects take variables, as the reference tool's do: its light angle, intensity, refraction, depth, dispersion, frost and splay bind to number variables on a layer (`variable.bind`, `effects/<i>/<lightAngle\|lightIntensity\|refraction\|depth\|dispersion\|radius\|splay>`, `radius` being the frost) and in an effect style (`style.bind`), and the Design panel's glass fields take a variable like the shadow and blur fields. A variable reads as the field shows it: intensity, refraction, dispersion and splay in percent. Tests: `binding_lists_tests::glass_fields_take_number_variables`, `effects_tests::glass_fields_take_bound_numbers_as_the_panel_shows_them`. Grade unchanged. |
 | 2026-11-01 | patch | M3: Delete on a layer inside an instance hides it (an override) instead of being refused ("You can't delete a layer or object from an instance. If you try, Figma will only toggle the layer's visibility instead of removing it", Guide to auto layout); `edit.delete` reports those ids under `hidden`, the structure and the main component stay as they were, one undo step; deleting the instance itself still removes it. Found by a documentation audit of the auto layout page. Test: `components_behaviour_tests::deleting_a_layer_inside_an_instance_hides_it_instead` (the refusal row for it is gone from `what_instances_cannot_override_is_refused`). Numbers unchanged |
 | 2026-10-31 | minor | M3, gap 10: library analytics cover styles and variables. A file reports how many of its layers use each of a library's styles and variables, and Show usage (`library.usage`) lists them beside the components, by a Type choice, with their layers and files. Layers inside instances count for their component. Insertions, detachments and modes aren't counted for them yet. Numbers unchanged. Tests: `library_assets_tests`. |
 | 2026-10-31 | minor | M6: as the help center describes code syntax, Dev Mode's SwiftUI and Compose code now writes a bound variable's iOS or Android code syntax in place of its value, as CSS already wrote the Web one: fills, strokes and their weight, sizes, corner radius, gaps, padding, opacity, the font family and size and the characters. A variable with no code syntax for the platform keeps the value, since a name made up here wouldn't exist in the code it lands in. ArkUI and Flutter have no code syntax platform and are unchanged. Test: `variables_behaviour_tests::swiftui_and_compose_name_variables_by_their_code_syntax`. Numbers unchanged. Grade unchanged |

From fe3567a56ba6f22d2722c902061dc965d50225d9 Mon Sep 17 00:00:00 2001
From: Oleksii Sukholita <72558888+aleksei-suholita@users.noreply.github.com>
Date: Thu, 5 Nov 2026 22:27:51 +0100
Subject: [PATCH 41/41] M3: glass bends with the reference tool's thick-lens
 profile and splits its colours over 8 steps (#1887)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* M3: glass bends with the reference tool's thick-lens profile and splits its colours over 8 steps (#1885)

The backdrop bends most a 1-unit bevel in from the edge, falls off as the
3.5th power of the way out of the curve to nothing `depth` further in, and
moves a fifth as much on the bevel itself (it fell off as the square of the
way in from the very edge). Dispersion samples each channel at 8 steps along
the bend with a triangular window, red moving furthest and blue least (it was
three samples, blue furthest), as far apart as the reference tool's: at 100%
red and blue move 0.16 of the bend apart (`Glass::DISPERSION_SPREAD`).
`Glass::max_bend` bounds red's furthest step, so the backdrop read around a
pane covers every sample, and the field margin covers the bevel.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M3: glass's bend stays within `max_bend`, checked on a single bright pixel too (#1885)

Review follow-up: the bend reaches `depth` × `refraction` a bevel in from
the edge, so `Glass::max_bend` drops its 0.999 and bounds it, as a test now
checks for several refractions. A single white pixel on black pins the
dispersion's triangular window, which a ramp and a flat backdrop can't tell
from one centred sample. The parity assessment records the bend, the
dispersion and how they were measured against the reference tool.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M3: glass's flat inside skips the bend's curve, and full dispersion stays within `max_bend` (#1885)

Review follow-up: `bend_at` returns 0 straight away past `depth` + the
bevel, where the curve and the bevel's easing are both 0, instead of
working out a power of 0 for every pixel of a pane's flat inside. A test
moves one white pixel along a row under every bend of the profile at full
dispersion and checks that no channel ever reads it further out than
`Glass::max_bend`, which sizes the backdrop read around a pane.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Oleksii Sukholita <oleksii.sukholita@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: FredApps <153173854+FredApps@users.noreply.github.com>
---
 ROADMAP.md                 |   3 +-
 crates/doc/src/props.rs    |  12 ++-
 crates/render/src/glass.rs | 192 +++++++++++++++++++++++++++++++++----
 docs/target-app-parity.md  |   3 +-
 4 files changed, 189 insertions(+), 21 deletions(-)

diff --git a/ROADMAP.md b/ROADMAP.md
index abc435b80..1a9258b9c 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -2,7 +2,7 @@
 
 **Stage: alpha** · next: beta, ~26 points and ~162–292 h away (one Opus 5.5 agent; ~33–67 h wall-clock with 5 agents)
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (glass effects take variables and keep their frost within 0–100; web host bridge: `?host=parent` or `data-host="page"` hands a page the app's files, documented in the hosting guide; a connector end moved with Cmd/Ctrl held goes on any part of an object, and stays there as the object moves or resizes; a tap on a plugin panel's button keeps what was typed in its fields; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; library analytics list how many layers and files use each style and variable; the Controller menu names each button as PlayStation and Switch controllers do; widgets draw lines and SVG pictures (plugin API 6); a connector end dropped along a side of a shape attaches to that side (#1708); regression tests pin a rounded shape's one-sided stroke and SVG ids and font families without XML-forbidden characters (#1351, #1124); a damaged image is refused with a reason instead of showing as an empty box (#1474); an image copied in another app pastes again on the desktop, and in the browser for the first time (#492); SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the Frame tool's Phone presets have the iPhone 17 family (#1691); Show in folder works in the Flatpak build and selects the file on Linux (#1701); a dashed line starts and ends with a half-length dash, on the canvas and in exports; the Pages, Layers and Assets search fields keep their text in the middle of the field (#1703); a board connector's path can be reshaped by dragging its path handles (#1710); boards have 16 more shapes (arrows, polygons, star, plus and flowchart symbols), in pickers that lay them out in a grid; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a stroke's Custom style takes a dash pattern of any length as a comma-separated list (#1681); a control request can set its own timeout, up to 10 minutes (`timeoutMs`; `figcraft-cli mcp --attach PORT --timeout SECONDS`) (#1696); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the keyboard's Menu key opens the context menu, as Shift+F10 does; an Open link action can open in place of the prototype, with "Open in new tab" off (gap 15); a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; a live session's welcome sends the document compressed to clients that read it, about seven times smaller (#1665); a control request that times out says truthfully whether it was dropped or is still running and will take effect, and only screenshots and input blame the window (#1673); a board keeps earlier votes' results, listed newest first in Results and deleted one at a time; the object a stamp will stick to is outlined while the stamp tool is over it or a stamp is dragged over it, and board objects take no drops (gap 24); a server can list the files shared from it now for everyone who reaches it, Home ▸ Online shows them and their links carry no secret (`team_files`, part of #742); team library analytics count detached instances per component and file (gap 10); skipping the Open link notice by command is saved with the preferences at once (gap 15); a selected connector's bar on a board sets its start and end points, solid or dashed, its weight and any colour (#1596); cells copied from a spreadsheet paste onto a board as a table; a long layer name stays on one line in the Export button and the Dev Mode header, ending with an ellipsis, and no longer covers the Design panel (#1650); with hundreds of layers selected, the Design panel and the selection overlays stop going over the whole selection on every frame, so dragging 648 layers averages about 1.1 ms of UI per frame (#1571); plugin panels show pictures: an `image` control, base64 within 256 KB and 4,096 px a side, named by its label (gap 6); `.fig` connector labels without a saved snapshot are kept, centred on their line (gap 1); a drag moving many layers re-runs only what sits around them, not each layer's bindings, sizing, text and instance checks, on every move (#1571); damaged font tracking table offsets are checked instead of wrapping on 32-bit targets, and font indexing makes its existing offset bounds explicit (#1125); Bosnian (`bs`) draft catalog; text style dedupe is O(spans) via a last-two cache and fingerprint buckets (#1102); pasted layers whose image the clipboard lacks are named and show a placeholder that reads as missing (#1646); paint-style colours on layers pasted from another design app keep their style instead of turning black (#1638); progress docs cleaned of what merges left twice: rows merged into one, repeated status items removed, and `cargo xtask docs` (in `ci`) fails on a repeated table row or status item; a name typed for a variable or collection finds the one with that exact id before one named like it, and stored mode ids, font family variables and the panels' labels read exact ids (#1613); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); `.fig` elbowed and curved connectors without a saved path are routed like board connectors instead of drawn straight (gap 1); every file a command reads whole by path is a regular file within a cap that fits it: documents 16 GiB, placed images 256 MiB, CLI scripts 1 GiB; `figcraft-cli connect publish` publishes a code repository's code connect mappings to a design file (gap 16); while a drag only moves a large selection, its outlines, box, slots, spacing and Design panel values are worked out once and shifted, not rebuilt on every move (#1571); Shift+Cmd/Ctrl+Enter on a selected board shape adds the next shape already joined to it, and goes on typing (#1597); an imported or pasted file finds an installed family under the other names its fonts give it, and with other case and spacing, instead of reporting it missing (#1292); a development example generates figcraft-cli's shell completions and man pages from its clap definitions (part of #1396); `.fig` ZIP image reads share a total byte budget and count skipped images in the import warnings (#1076); German terminology corrections (M10): gradient stops, OpenType stylistic sets and the Home-screen preference; a component set's property rows fit the 240 px right panel: variant values wrap two to a line there and every + and − stays in view; the server key is checked by comparing SHA-256 hashes of the presented and the kept key, as the deployment guide says (#1130); opening a file contacts no team library server it names until you check it (#1097); a hostile server can no longer grow a client's memory with made-up people, and a session remembers a bounded number of deleted layer ids (#1121); `doc.list` gives AI agents and plugins the open files' names, not their paths (#1117); with a large selection, frames where nothing changed reuse the selection's outlines, box and slots and the Design panel's instance and position values instead of working them out again (#1571); team libraries and plugins larger than the 16 MiB download burst can be downloaded again, more slowly (#1089); a batch keeps one undo snapshot, not one per step (#1099); files nested 256 levels deep import on the browser's 1 MB stack (#1101); SVG and PDF exports count pattern sources and the renders they embed from the layer's depth, so one cap bounds a whole export (#1082); an explicit variables file path (`variable.import`, the `variables` of `file.open` and `file.import`) is refused past 256 MiB or when it isn't a regular file, as the sibling `variables.json` already was (part of #1114); joining and leaving a file nobody is editing reads and writes nothing on the server: it stays loaded a minute after everyone leaves (#1074); opening a `.figcraft` file unpacks at most 6 GiB in all (2 GiB in the browser), every area together (#1079); hovering the canvas hit-tests once per pointer move, not on every frame, and moving an auto layout frame no longer lays out its contents again on every move (#1571); `.fig` instance expansion no longer walks variable nodes for every instance or copies every outer override row into each nested instance (#1077); `comment.people` lists names that were only @mentioned, and `comment.next` and `comment.prompt` carry the mentions too (#1415); grid auto-placement looks for free cells a 64-bit word at a time and skips what blocks it, with the same placements (#1083); with the pen out, Enter or a double-click ends the path and edits the vector with the Move tool instead of drawing on (#1430); a recovery copy made while a version is previewed holds the file, not the version shown; a FigJam `.jam` file opens as a board (#1342); the Actions palette offers only commands that run from it, and no second row reading like a menu item: Place image opens the file dialog (#1574); share links can comment: a third access level beside edit and view, whose holder sees the file live and adds, replies to, reacts to and resolves comments but can't change the design; Preferences ▸ Scroll wheel zoom: a mouse wheel zooms the canvas about the pointer and Cmd/Ctrl+wheel scrolls (#1390); `comment.list {mentions}` lists only the threads that @mention a name (#1415); in the browser an internal error that stops the page keeps its unsaved files, which open again on reload (#1123); boolean operations refuse input past their caps, and a boolean group past them draws without its result (#1104); figcraft-cli parses its arguments with clap, following RFC-0012 (#1396); the selection and hover outlines of rounded rectangles and frames follow their corners (#1506); component properties keep the order they were made in when one is renamed, and Make slot asks for the slot's name first (#1536, #1537); the browser build publishes files to a server, so Share ▸ Online and Publish to server work there (#917); the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); SVG import reads `color()` and `color-mix()` colours, with a note and a grey for those it can't (#1550); the portable Windows zip keeps its settings, recovery copies and plugins in `config\` beside the executable, starting with an installed copy's preferences; the window starts on other graphics when its first ones fail before the first frame: Direct3D 12 compiles with FXC and no device compiles wgpu's indirect-validation shaders, then Vulkan, OpenGL and lower requirements on the power-saving GPU (#965, #1438); Thai, Lao, Khmer and Burmese lines break between words (#1219); an AI agent attached over MCP shows where it works (#1416); a manual overlay's position can be dragged on the canvas (#405); one name for live sessions and comments: Preferences ▸ Your name, in the Join dialog too, kept in the browser, and a rename shows at once in the sessions you are in (#1380); requests that change a server's files have a budget per address, the server key's too, and join codes are found by their hash (#1075); the Join dialog shows a join from the click until its file is ready, with Cancel, and a failed join with Try again (#1381); SVG import draws each pattern tile once per scale, within the layer budget (#1080); Vietnamese letters typed with combining marks (decomposed) take one font that has every mark, instead of missing-glyph boxes beside the letter (#1478); comment.list reports each message's @mentions (#1415); mask groups draw only over the area they can paint, and nested isolated layers share one memory budget (#1061); components can't contain their own instances, directly or through other components; `edit.duplicate` returns an id map with `map: true` (#995); the batches kept for reconnecting apps are bounded in bytes by default, and `figcraft-server` takes `max_log_mb` (#1069); MCP and control calls name their document (#998); sibling placement in live sessions searches instead of counting (#1065); an AI agent attached over MCP comments under its own name, with an Agent label (#1414); the instance-swap menus have a search field (#1338); a refused batch's fixes take time linear in the batch (#1063); the connector tool shows the connector it will make while dragging, ends snapping to attach points (#1387); large images on the canvas draw from a smaller copy, so two 16k images no longer lag (#1483); a file's JPEG thumbnail can't crash the home screen (#1491's progressive JPEG check, now shared); `.fig` import: library text styles linked by asset key, and override rows restating a nested level (#1234); `.fig` import keeps the file's saved line breaks while the text and its box are unedited (#1236); Download a missing free font from the Missing fonts window (`font.download`, #754); the web build's wasm back under its 24 MiB gate (#1472); shadows of images with transparent pixels follow their alpha (#1289); Crop image: Object ▸ Crop image, the right-click menu and the image fill row enter crop mode (`image.crop`, #1464); offline Penpot 2.x import/export (#1143); optional batch continue-on-error with per-step outcomes (#1386); the Design panel's sections on one grid (#858); FigJam outer shape outlines and sticky body fallback beside author text (#1341, #1397); images placed at their own size, 2x screenshots in points (#1360); the toolbar on one 32 pt grid, without its Resources button (#1210); M4: zero-length round-capped dashes draw dots; dash expansion uses the existing safety budget; extracted from #1143; Arabic draft catalog; scaled instances keep their scale when their main is rebuilt (#922); .fig embedded images are copied once per blob, not once per hash (#1059); page ruler guides survive save and reopen (#1476); colour picker LCH and OKLCH models; non-ASCII layer names transliterate in code export (#1235); branches in live sessions and branch history entries, gap 17; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; Installed weights of an embedded font family (#1246); `.sketch` import, best effort (Sketch 48 and newer); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, the iteration marks 〱–〵 and the halfwidth parentheses, with behaviour cases for each; Adobe Fonts found on macOS (#298); egui 0.37 hidden-capture deadline contract; Dev Mode measurements kept on the canvas and a read-only layers panel; boards: a board area row and progress entry; community fixes in #507, #510, #529 and #530: auto-save, a text box by dragging, batch step references, removing someone from a live session, Russian and Turkish catalogs reviewed, Czech and Indonesian drafts, the Japanese draft completed, zoom previews, the web clipboard, Alt-drag snapping and Cmd+D repeat, recovery copies, crash and rollback fixes, colour emoji, `.fig` import fixes; earlier changes are in the revision history below) · **Target:** Figma Design (desktop app 126.10.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (glass bends with a thick-lens profile and splits its colours over 8 steps; glass effects take variables and keep their frost within 0–100; web host bridge: `?host=parent` or `data-host="page"` hands a page the app's files, documented in the hosting guide; a connector end moved with Cmd/Ctrl held goes on any part of an object, and stays there as the object moves or resizes; a tap on a plugin panel's button keeps what was typed in its fields; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; library analytics list how many layers and files use each style and variable; the Controller menu names each button as PlayStation and Switch controllers do; widgets draw lines and SVG pictures (plugin API 6); a connector end dropped along a side of a shape attaches to that side (#1708); regression tests pin a rounded shape's one-sided stroke and SVG ids and font families without XML-forbidden characters (#1351, #1124); a damaged image is refused with a reason instead of showing as an empty box (#1474); an image copied in another app pastes again on the desktop, and in the browser for the first time (#492); SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the Frame tool's Phone presets have the iPhone 17 family (#1691); Show in folder works in the Flatpak build and selects the file on Linux (#1701); a dashed line starts and ends with a half-length dash, on the canvas and in exports; the Pages, Layers and Assets search fields keep their text in the middle of the field (#1703); a board connector's path can be reshaped by dragging its path handles (#1710); boards have 16 more shapes (arrows, polygons, star, plus and flowchart symbols), in pickers that lay them out in a grid; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a stroke's Custom style takes a dash pattern of any length as a comma-separated list (#1681); a control request can set its own timeout, up to 10 minutes (`timeoutMs`; `figcraft-cli mcp --attach PORT --timeout SECONDS`) (#1696); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the keyboard's Menu key opens the context menu, as Shift+F10 does; an Open link action can open in place of the prototype, with "Open in new tab" off (gap 15); a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; a live session's welcome sends the document compressed to clients that read it, about seven times smaller (#1665); a control request that times out says truthfully whether it was dropped or is still running and will take effect, and only screenshots and input blame the window (#1673); a board keeps earlier votes' results, listed newest first in Results and deleted one at a time; the object a stamp will stick to is outlined while the stamp tool is over it or a stamp is dragged over it, and board objects take no drops (gap 24); a server can list the files shared from it now for everyone who reaches it, Home ▸ Online shows them and their links carry no secret (`team_files`, part of #742); team library analytics count detached instances per component and file (gap 10); skipping the Open link notice by command is saved with the preferences at once (gap 15); a selected connector's bar on a board sets its start and end points, solid or dashed, its weight and any colour (#1596); cells copied from a spreadsheet paste onto a board as a table; a long layer name stays on one line in the Export button and the Dev Mode header, ending with an ellipsis, and no longer covers the Design panel (#1650); with hundreds of layers selected, the Design panel and the selection overlays stop going over the whole selection on every frame, so dragging 648 layers averages about 1.1 ms of UI per frame (#1571); plugin panels show pictures: an `image` control, base64 within 256 KB and 4,096 px a side, named by its label (gap 6); `.fig` connector labels without a saved snapshot are kept, centred on their line (gap 1); a drag moving many layers re-runs only what sits around them, not each layer's bindings, sizing, text and instance checks, on every move (#1571); damaged font tracking table offsets are checked instead of wrapping on 32-bit targets, and font indexing makes its existing offset bounds explicit (#1125); Bosnian (`bs`) draft catalog; text style dedupe is O(spans) via a last-two cache and fingerprint buckets (#1102); pasted layers whose image the clipboard lacks are named and show a placeholder that reads as missing (#1646); paint-style colours on layers pasted from another design app keep their style instead of turning black (#1638); progress docs cleaned of what merges left twice: rows merged into one, repeated status items removed, and `cargo xtask docs` (in `ci`) fails on a repeated table row or status item; a name typed for a variable or collection finds the one with that exact id before one named like it, and stored mode ids, font family variables and the panels' labels read exact ids (#1613); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); `.fig` elbowed and curved connectors without a saved path are routed like board connectors instead of drawn straight (gap 1); every file a command reads whole by path is a regular file within a cap that fits it: documents 16 GiB, placed images 256 MiB, CLI scripts 1 GiB; `figcraft-cli connect publish` publishes a code repository's code connect mappings to a design file (gap 16); while a drag only moves a large selection, its outlines, box, slots, spacing and Design panel values are worked out once and shifted, not rebuilt on every move (#1571); Shift+Cmd/Ctrl+Enter on a selected board shape adds the next shape already joined to it, and goes on typing (#1597); an imported or pasted file finds an installed family under the other names its fonts give it, and with other case and spacing, instead of reporting it missing (#1292); a development example generates figcraft-cli's shell completions and man pages from its clap definitions (part of #1396); `.fig` ZIP image reads share a total byte budget and count skipped images in the import warnings (#1076); German terminology corrections (M10): gradient stops, OpenType stylistic sets and the Home-screen preference; a component set's property rows fit the 240 px right panel: variant values wrap two to a line there and every + and − stays in view; the server key is checked by comparing SHA-256 hashes of the presented and the kept key, as the deployment guide says (#1130); opening a file contacts no team library server it names until you check it (#1097); a hostile server can no longer grow a client's memory with made-up people, and a session remembers a bounded number of deleted layer ids (#1121); `doc.list` gives AI agents and plugins the open files' names, not their paths (#1117); with a large selection, frames where nothing changed reuse the selection's outlines, box and slots and the Design panel's instance and position values instead of working them out again (#1571); team libraries and plugins larger than the 16 MiB download burst can be downloaded again, more slowly (#1089); a batch keeps one undo snapshot, not one per step (#1099); files nested 256 levels deep import on the browser's 1 MB stack (#1101); SVG and PDF exports count pattern sources and the renders they embed from the layer's depth, so one cap bounds a whole export (#1082); an explicit variables file path (`variable.import`, the `variables` of `file.open` and `file.import`) is refused past 256 MiB or when it isn't a regular file, as the sibling `variables.json` already was (part of #1114); joining and leaving a file nobody is editing reads and writes nothing on the server: it stays loaded a minute after everyone leaves (#1074); opening a `.figcraft` file unpacks at most 6 GiB in all (2 GiB in the browser), every area together (#1079); hovering the canvas hit-tests once per pointer move, not on every frame, and moving an auto layout frame no longer lays out its contents again on every move (#1571); `.fig` instance expansion no longer walks variable nodes for every instance or copies every outer override row into each nested instance (#1077); `comment.people` lists names that were only @mentioned, and `comment.next` and `comment.prompt` carry the mentions too (#1415); grid auto-placement looks for free cells a 64-bit word at a time and skips what blocks it, with the same placements (#1083); with the pen out, Enter or a double-click ends the path and edits the vector with the Move tool instead of drawing on (#1430); a recovery copy made while a version is previewed holds the file, not the version shown; a FigJam `.jam` file opens as a board (#1342); the Actions palette offers only commands that run from it, and no second row reading like a menu item: Place image opens the file dialog (#1574); share links can comment: a third access level beside edit and view, whose holder sees the file live and adds, replies to, reacts to and resolves comments but can't change the design; Preferences ▸ Scroll wheel zoom: a mouse wheel zooms the canvas about the pointer and Cmd/Ctrl+wheel scrolls (#1390); `comment.list {mentions}` lists only the threads that @mention a name (#1415); in the browser an internal error that stops the page keeps its unsaved files, which open again on reload (#1123); boolean operations refuse input past their caps, and a boolean group past them draws without its result (#1104); figcraft-cli parses its arguments with clap, following RFC-0012 (#1396); the selection and hover outlines of rounded rectangles and frames follow their corners (#1506); component properties keep the order they were made in when one is renamed, and Make slot asks for the slot's name first (#1536, #1537); the browser build publishes files to a server, so Share ▸ Online and Publish to server work there (#917); the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); SVG import reads `color()` and `color-mix()` colours, with a note and a grey for those it can't (#1550); the portable Windows zip keeps its settings, recovery copies and plugins in `config\` beside the executable, starting with an installed copy's preferences; the window starts on other graphics when its first ones fail before the first frame: Direct3D 12 compiles with FXC and no device compiles wgpu's indirect-validation shaders, then Vulkan, OpenGL and lower requirements on the power-saving GPU (#965, #1438); Thai, Lao, Khmer and Burmese lines break between words (#1219); an AI agent attached over MCP shows where it works (#1416); a manual overlay's position can be dragged on the canvas (#405); one name for live sessions and comments: Preferences ▸ Your name, in the Join dialog too, kept in the browser, and a rename shows at once in the sessions you are in (#1380); requests that change a server's files have a budget per address, the server key's too, and join codes are found by their hash (#1075); the Join dialog shows a join from the click until its file is ready, with Cancel, and a failed join with Try again (#1381); SVG import draws each pattern tile once per scale, within the layer budget (#1080); Vietnamese letters typed with combining marks (decomposed) take one font that has every mark, instead of missing-glyph boxes beside the letter (#1478); comment.list reports each message's @mentions (#1415); mask groups draw only over the area they can paint, and nested isolated layers share one memory budget (#1061); components can't contain their own instances, directly or through other components; `edit.duplicate` returns an id map with `map: true` (#995); the batches kept for reconnecting apps are bounded in bytes by default, and `figcraft-server` takes `max_log_mb` (#1069); MCP and control calls name their document (#998); sibling placement in live sessions searches instead of counting (#1065); an AI agent attached over MCP comments under its own name, with an Agent label (#1414); the instance-swap menus have a search field (#1338); a refused batch's fixes take time linear in the batch (#1063); the connector tool shows the connector it will make while dragging, ends snapping to attach points (#1387); large images on the canvas draw from a smaller copy, so two 16k images no longer lag (#1483); a file's JPEG thumbnail can't crash the home screen (#1491's progressive JPEG check, now shared); `.fig` import: library text styles linked by asset key, and override rows restating a nested level (#1234); `.fig` import keeps the file's saved line breaks while the text and its box are unedited (#1236); Download a missing free font from the Missing fonts window (`font.download`, #754); the web build's wasm back under its 24 MiB gate (#1472); shadows of images with transparent pixels follow their alpha (#1289); Crop image: Object ▸ Crop image, the right-click menu and the image fill row enter crop mode (`image.crop`, #1464); offline Penpot 2.x import/export (#1143); optional batch continue-on-error with per-step outcomes (#1386); the Design panel's sections on one grid (#858); FigJam outer shape outlines and sticky body fallback beside author text (#1341, #1397); images placed at their own size, 2x screenshots in points (#1360); the toolbar on one 32 pt grid, without its Resources button (#1210); M4: zero-length round-capped dashes draw dots; dash expansion uses the existing safety budget; extracted from #1143; Arabic draft catalog; scaled instances keep their scale when their main is rebuilt (#922); .fig embedded images are copied once per blob, not once per hash (#1059); page ruler guides survive save and reopen (#1476); colour picker LCH and OKLCH models; non-ASCII layer names transliterate in code export (#1235); branches in live sessions and branch history entries, gap 17; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; Installed weights of an embedded font family (#1246); `.sketch` import, best effort (Sketch 48 and newer); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, the iteration marks 〱–〵 and the halfwidth parentheses, with behaviour cases for each; Adobe Fonts found on macOS (#298); egui 0.37 hidden-capture deadline contract; Dev Mode measurements kept on the canvas and a read-only layers panel; boards: a board area row and progress entry; community fixes in #507, #510, #529 and #530: auto-save, a text box by dragging, batch step references, removing someone from a live session, Russian and Turkish catalogs reviewed, Czech and Indonesian drafts, the Japanese draft completed, zoom previews, the web clipboard, Alt-drag snapping and Cmd+D repeat, recovery copies, crash and rollback fixes, colour emoji, `.fig` import fixes; earlier changes are in the revision history below) · **Target:** Figma Design (desktop app 126.10.7)
 
 FigCraft is a clean-room, open-source, pure-Rust reimplementation of the Figma design workflow,
 native on macOS, Windows, Linux and FreeBSD and in the browser, fully drivable by agents through
@@ -358,6 +358,7 @@ Ranked; detail and milestones in [`docs/roadmap.md`](docs/roadmap.md).
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-02 | minor | M3, #1885: glass bends the backdrop with the reference tool's thick-lens profile: most a 1-unit bevel in from the edge, falling off as the 3.5th power of the way out of the curve to nothing `depth` further in, and a fifth as much on the bevel itself (it fell off as the square of the way in from the very edge). Dispersion splits the channels over 8 steps with a triangular window, red moving furthest and blue least, as far apart as the reference tool's (at 100% red and blue move 0.16 of the bend apart; it was three samples, blue furthest), and `Glass::max_bend` bounds red's furthest step, so the backdrop read around a pane covers every sample. Tests: `glass::tests::the_bend_follows_the_thick_lens_profile`, `glass::tests::dispersion_splits_the_channels_along_the_bend`. Numbers unchanged |
 | 2026-11-02 | minor | M3, #1885: glass effects take variables (light angle, intensity, refraction, depth, dispersion, frost and splay, on layers and in effect styles, and from the Design panel's glass fields), and a glass's frost stays within 0–100, the reference tool's range: a larger frost from an older file draws at 100, and the field, a bound variable and scaling stop there. Numbers unchanged |
 | 2026-10-31 | minor | M12: as the help describes, holding Cmd/Ctrl while moving a connector's end places it on any part of an object instead of snapping to a side. It keeps that spot as a fraction of the object's box, so it follows the object when it moves or resizes, and without the key an end snaps as before. `board.connector {fromAt, toAt}` and `board.reattach {at}` take it; saved only when set. Numbers unchanged |
 | 2026-10-31 | patch | M11: a trackpad or touch tap sends its press and release in one frame, so a plugin panel's field committed in the frame its button was clicked and the value was lost: the Counter's Set count… kept the old count. The plugin now gets both, the field's value first. The `window.figcraft` docs name `screenshot`'s `data`. Numbers unchanged |
diff --git a/crates/doc/src/props.rs b/crates/doc/src/props.rs
index 242ce3d11..13d1878aa 100644
--- a/crates/doc/src/props.rs
+++ b/crates/doc/src/props.rs
@@ -716,10 +716,18 @@ impl Glass {
         }
     }
 
-    /// Furthest the curved edge moves the backdrop (document units).
+    /// How far `dispersion` splits the colour channels, as a share of the bend: at full dispersion
+    /// red moves up to this much further and blue as much less. Matched to the reference tool:
+    /// across a black-to-white edge in the bend, red and blue part about 4.7 px at 100% and 2.4 px
+    /// at 50% (at 2×, depth 20, refraction 80%).
+    pub const DISPERSION_SPREAD: f64 = 0.16;
+
+    /// Furthest the curved edge moves the backdrop (document units): at most `depth` × `refraction`
+    /// (all of it a bevel in from the edge), and red's dispersion steps up to
+    /// [`Self::DISPERSION_SPREAD`] × `dispersion` times that again.
     pub fn max_bend(&self) -> f64 {
         let g = self.sanitized();
-        g.refraction * g.depth * (1.0 + g.dispersion * 0.25)
+        g.refraction * g.depth * (1.0 + Self::DISPERSION_SPREAD * g.dispersion)
     }
 }
 
diff --git a/crates/render/src/glass.rs b/crates/render/src/glass.rs
index 23301b010..da998bf0d 100644
--- a/crates/render/src/glass.rs
+++ b/crates/render/src/glass.rs
@@ -1,9 +1,12 @@
 //! The glass effect: the backdrop seen through a pane whose edges curve down like a lens.
 //!
-//! Within `depth` of the outline the surface curves: the backdrop there is bent towards the inside
-//! (strongest at the very edge, `refraction` × `depth` far), each colour channel by a slightly
-//! different amount (`dispersion`, a rainbow fringe), and the rim catches the light: brightest
-//! where it faces `light_angle`, half as bright on the opposite side, spread wider by `splay`.
+//! Within `depth` of the outline the surface curves like a thick lens: the backdrop there is bent
+//! towards the inside, most a [`BEVEL`] in from the edge (`refraction` × `depth` far), falling off
+//! as the 3.5th power of the way out of the curve and gone `depth` further in, with a fifth as
+//! much on the bevel itself ([`bend_at`]). Each colour channel bends by a different amount
+//! (`dispersion`, a rainbow fringe: red furthest, blue least, each smeared along the bend), and the
+//! rim catches the light: brightest where it faces `light_angle`, half as bright on the opposite
+//! side, spread wider by `splay`.
 //! `frost` blurs the backdrop first. Distances to the outline come from an exact Euclidean
 //! distance transform of the shape's coverage.
 //!
@@ -162,6 +165,70 @@ fn smooth_normals(dist: &[f32], w: usize, h: usize, r: usize) -> Vec<(f32, f32)>
         .collect()
 }
 
+/// The bevel along a glass's edge (document units): where the bend eases off before the edge.
+pub(crate) const BEVEL: f64 = 1.0;
+
+/// How sharply the bend falls off going in: the 3.5th power of the way out of the curve.
+const PROFILE_EXP: f32 = 3.5;
+
+/// The furthest the backdrop moves, as a share of `depth`.
+const MAX_BEND: f32 = 0.999;
+
+/// The bend on the bevel itself, as a share of [`MAX_BEND`] × `depth` × `refraction`.
+const RIM_BEND: f32 = 0.2;
+
+/// Steps of the dispersion window: each channel is sampled this many times along the bend, weighted
+/// by a triangle (the two end steps weigh nothing and are skipped).
+const DISPERSION_STEPS: usize = 8;
+
+/// `x` from `a` to `b` as 0 to 1, clamped (a span under 1e-5 counts as 1e-5).
+fn lin(a: f32, b: f32, x: f32) -> f32 {
+    ((x - a) / (b - a).max(1e-5)).clamp(0.0, 1.0)
+}
+
+/// How far the backdrop moves at `x` pixels in from the edge, for a glass `depth` and [`BEVEL`]
+/// `bevel` deep (pixels) and `refraction` (0–1): a thick lens's profile, the most a bevel in from
+/// the edge, falling off as the 3.5th power of the way out of the curve to nothing `depth` further
+/// in, and a fifth as much on the bevel itself, eased between the two over its outer 70%.
+pub(crate) fn bend_at(x: f32, depth: f32, bevel: f32, refraction: f32) -> f32 {
+    // Past the curve (and the bevel's easing) nothing bends: the flat inside of the pane.
+    if x >= depth.max(1e-4) + bevel {
+        return 0.0;
+    }
+    let sd = -x;
+    let t = lin(-depth - bevel, -bevel, sd);
+    let most = MAX_BEND * depth;
+    let core = (t.powf(PROFILE_EXP) * depth * refraction).clamp(-most, most);
+    let rim = refraction * RIM_BEND * most;
+    let u = lin(-bevel - 1e-4, -0.3 * bevel, sd);
+    core + (rim - core) * u
+}
+
+/// The backdrop seen at pixel coordinates (`x`, `y`) moved by (`dx`, `dy`), its channels split by
+/// `k` (dispersion, 0–1): red moves up to `k` further, blue up to `k` less, each smeared along the
+/// move by a triangular window of [`DISPERSION_STEPS`]. One sample when `k` is too small to show.
+fn dispersed(frosted: &Pixmap, x: f32, y: f32, dx: f32, dy: f32, k: f32) -> [f32; 4] {
+    let at = |s: f32| sample(frosted, x + dx * s, y + dy * s);
+    if k < 0.001 {
+        let s = at(1.0);
+        return [s[0].min(s[3]), s[1].min(s[3]), s[2].min(s[3]), s[3]];
+    }
+    let last = (DISPERSION_STEPS - 1) as f32;
+    let (mut acc, mut sum) = ([0.0f32; 4], 0.0f32);
+    for i in 1..DISPERSION_STEPS - 1 {
+        let t = i as f32 / last - 0.5;
+        let w = 1.0 - (2.0 * t).abs();
+        let (r, g, b) = (at(1.0 + (t + 0.5) * k), at(1.0 + t * k), at(1.0 + (t - 0.5) * k));
+        acc[0] += r[0] * w;
+        acc[1] += g[1] * w;
+        acc[2] += b[2] * w;
+        acc[3] += r[3].max(g[3]).max(b[3]) * w;
+        sum += w;
+    }
+    let a = acc[3] / sum;
+    [(acc[0] / sum).min(a), (acc[1] / sum).min(a), (acc[2] / sum).min(a), a]
+}
+
 /// Bilinear sample of premultiplied `p` at pixel coordinates `(x, y)` (centres at +0.5), each
 /// channel 0..=255; transparent outside.
 fn sample(p: &Pixmap, x: f32, y: f32) -> [f32; 4] {
@@ -411,20 +478,20 @@ pub fn glass(g: &Glass, frame: EffectFrame<'_>) -> Option<Pixmap> {
     let EffectFrame { shape, back, pad, size: (w, h), xf, scale } = frame;
     let g = g.sanitized();
     let depth = (g.depth * scale).clamp(1.0, 1024.0);
+    let bevel = (BEVEL * scale).min(1024.0);
     let band = (depth * (0.15 + 0.35 * g.splay)).max(1.0);
     let reach = light_reach(band, g.light_intensity);
     let r = (depth * 0.1).clamp(1.0, 8.0) as usize;
     // Coverage with a margin, so wherever the layer is cut every distance the pixels read is
-    // exact: the bend's (within `depth`), the light's (within `reach`) and those the normals are
-    // smoothed from (2r + 1 further).
-    let m = depth.max(reach).ceil() as u32 + 4 * r as u32 + 4;
+    // exact: the bend's (within `depth` + `bevel`), the light's (within `reach`) and those the
+    // normals are smoothed from (2r + 1 further).
+    let m = (depth + bevel).max(reach).ceil() as u32 + 4 * r as u32 + 4;
     let (fields, shift) = shape_fields(shape, xf, w, h, m, r)?;
     let mut frosted = back.clone();
     fx::blur(&mut frosted, g.frost / 2.0 * scale);
     let ang = g.light_angle.to_radians();
     let light = (ang.sin() as f32, -ang.cos() as f32);
-    let bend_max = (g.refraction * depth) as f32;
-    let fringe = (g.dispersion * 0.25) as f32;
+    let (refraction, dispersion, bevel) = (g.refraction as f32, (g.dispersion * Glass::DISPERSION_SPREAD) as f32, bevel as f32);
     let power = (6.0 - 5.0 * g.splay) as f32;
     let (band, reach) = (band as f32, reach as f32);
     // The falloff, lowered by its value at `reach` and scaled back to 1 at the edge, so the light
@@ -441,19 +508,15 @@ pub fn glass(g: &Glass, frame: EffectFrame<'_>) -> Option<Pixmap> {
             if c <= 0.0 {
                 continue;
             }
-            let t = (d / depth).min(1.0);
-            let bend = bend_max * (1.0 - t) * (1.0 - t);
+            let bend = bend_at(d, depth, bevel, refraction);
             let (bx, by) = (x as f32 + pad as f32 + 0.5, y as f32 + pad as f32 + 0.5);
             let base = if bend == 0.0 {
-                // Nothing bends (past `depth`, or no refraction): the three channels' samples are
-                // at the same point, so one sample.
+                // Nothing bends (past `depth` + `bevel`, or no refraction): the channels' samples
+                // are at the same point, so one sample.
                 let s = sample(&frosted, bx, by);
                 [s[0].min(s[3]), s[1].min(s[3]), s[2].min(s[3]), s[3]]
             } else {
-                let at = |k: f32| sample(&frosted, bx + inward.0 * bend * k, by + inward.1 * bend * k);
-                let (rs, gs, bs) = (at(1.0 - fringe), at(1.0), at(1.0 + fringe));
-                let a = rs[3].max(gs[3]).max(bs[3]);
-                [rs[0].min(a), gs[1].min(a), bs[2].min(a), a]
+                dispersed(&frosted, bx, by, inward.0 * bend, inward.1 * bend, dispersion)
             };
             // The rim catches the light where it faces it, and half as much opposite. It fades out
             // by `reach` and is none past it, wherever the layer is cut.
@@ -479,6 +542,101 @@ pub fn glass(g: &Glass, frame: EffectFrame<'_>) -> Option<Pixmap> {
 mod tests {
     use super::*;
 
+    /// The bend at depth 20, refraction 0.8 and a 1-unit bevel, x units in from the edge: the
+    /// reference profile's values.
+    #[test]
+    fn the_bend_follows_the_thick_lens_profile() {
+        let table = [
+            (0.10, 3.1968),
+            (0.25, 3.1968),
+            (0.50, 6.8543),
+            (0.75, 11.4263),
+            (1.00, 15.9982),
+            (2.0, 13.3707),
+            (4.0, 9.0591),
+            (6.0, 5.8457),
+            (8.0, 3.5426),
+            (10.0, 1.9742),
+            (16.0, 0.1250),
+            (20.0, 0.0004),
+            (21.0, 0.0),
+            (40.0, 0.0),
+        ];
+        for (x, want) in table {
+            let got = bend_at(x, 20.0, 1.0, 0.8);
+            assert!((got - want).abs() < 1e-3, "x {x}: {got} vs {want}");
+        }
+        // No refraction, no bend; never more than 0.999 × depth, never outwards.
+        assert_eq!(bend_at(0.5, 20.0, 1.0, 0.0), 0.0);
+        for i in 0..400 {
+            let x = i as f32 * 0.1;
+            let b = bend_at(x, 20.0, 1.0, 1.0);
+            assert!((0.0..=0.999 * 20.0).contains(&b), "x {x}: {b}");
+        }
+        // A depth thinner than the bevel (zoomed far in) still gives numbers.
+        assert!(bend_at(0.5, 1.0, 8.0, 1.0).is_finite());
+        // `Glass::max_bend`, which sizes the backdrop read around a pane, bounds the whole bend.
+        for refraction in [0.3, 0.8, 1.0] {
+            let most = (0..800).map(|i| bend_at(i as f32 * 0.05, 20.0, 1.0, refraction as f32)).fold(0.0f32, f32::max);
+            let bound = Glass { refraction, depth: 20.0, dispersion: 0.0, ..Glass::default() }.max_bend();
+            assert!(f64::from(most) <= bound + 1e-4, "refraction {refraction}: {most} past {bound}");
+        }
+    }
+
+    /// Dispersion off is one sample at the moved point; on, the channels split along the move, red
+    /// further and blue less, and a flat backdrop stays flat.
+    #[test]
+    fn dispersion_splits_the_channels_along_the_bend() {
+        // A 40 × 1 ramp: red, green and blue all rise with x.
+        let mut p = Pixmap::new(40, 1).unwrap();
+        for (i, px) in p.data_mut().chunks_exact_mut(4).enumerate() {
+            let v = (i * 6) as u8;
+            px.copy_from_slice(&[v, v, v, 255]);
+        }
+        let one = sample(&p, 10.5 + 8.0, 0.5);
+        let off = dispersed(&p, 10.5, 0.5, 8.0, 0.0, 0.0);
+        assert_eq!(off, [one[0], one[1], one[2], one[3]]);
+        let on = dispersed(&p, 10.5, 0.5, 8.0, 0.0, 1.0);
+        assert!(on[0] > on[1] && on[1] > on[2], "{on:?}");
+        assert!((on[1] - one[1]).abs() < 1e-3, "green stays centred on the move: {on:?} vs {one:?}");
+        let mut flat = Pixmap::new(40, 1).unwrap();
+        flat.fill(tiny_skia::Color::from_rgba8(90, 120, 200, 255));
+        let f = dispersed(&flat, 10.5, 0.5, 8.0, 0.0, 1.0);
+        assert!(f.iter().zip([90.0, 120.0, 200.0, 255.0]).all(|(a, b)| (a - b).abs() < 1e-3), "{f:?}");
+        // One white pixel on black: only the weighted steps that reach it pick it up, red and green
+        // from opposite ends of their windows (the same amount), blue none.
+        let mut impulse = Pixmap::new(40, 1).unwrap();
+        impulse.fill(tiny_skia::Color::BLACK);
+        impulse.data_mut()[20 * 4..21 * 4].copy_from_slice(&[255, 255, 255, 255]);
+        let spread = dispersed(&impulse, 10.5, 0.5, 8.0, 0.0, 1.0);
+        assert!((spread[0] - 33.392857).abs() < 1e-3 && (spread[1] - 33.392857).abs() < 1e-3, "{spread:?}");
+        assert_eq!(spread[2], 0.0);
+    }
+
+    /// At full dispersion red's furthest step stays within `Glass::max_bend` of the pixel, all
+    /// along the bend, so the backdrop read around a pane covers it: one white pixel further out
+    /// than that is never seen.
+    #[test]
+    fn full_dispersion_reads_no_further_than_max_bend() {
+        let bound = Glass { refraction: 1.0, depth: 20.0, dispersion: 1.0, ..Glass::default() }.max_bend() as f32;
+        let k = Glass::DISPERSION_SPREAD as f32;
+        let mut furthest = 0usize;
+        for i in 0..100 {
+            let bend = bend_at(i as f32 * 0.25, 20.0, 1.0, 1.0);
+            for at in 0..40 {
+                let mut impulse = Pixmap::new(40, 1).unwrap();
+                impulse.fill(tiny_skia::Color::BLACK);
+                impulse.data_mut()[at * 4..at * 4 + 4].copy_from_slice(&[255, 255, 255, 255]);
+                let s = dispersed(&impulse, 0.5, 0.5, bend, 0.0, k);
+                if s[0].max(s[1]).max(s[2]) > 0.0 {
+                    furthest = furthest.max(at);
+                }
+            }
+        }
+        // A sample `o` pixels along picks up the pixel `at` while |o − at| < 1.
+        assert!(furthest > 0 && (furthest as f32) < bound + 1.0, "pixel {furthest} seen, past {bound}");
+    }
+
     #[test]
     fn distance_of_a_square() {
         let mut p = Pixmap::new(21, 21).unwrap();
diff --git a/docs/target-app-parity.md b/docs/target-app-parity.md
index 75a426231..312c7e0ac 100644
--- a/docs/target-app-parity.md
+++ b/docs/target-app-parity.md
@@ -1,6 +1,6 @@
 # FigCraft parity with Figma
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-01 · **Change:** minor (bulleted lists use the same bullet at every level of indentation, as the help center says, instead of a white bullet and a square at the deeper levels; typing `1)` and a space at the start of a paragraph starts a numbered list, as `1.` does, both being the help center's creation characters; a link on text is underlined by default, as the help center says, and Underline takes the underline off while the link stays; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; gap 6: widgets draw lines and SVG pictures (plugin API 6); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); Thai, Lao, Khmer and Burmese lines break between words (#1219); MCP and control calls name their document (#998); shadows of images with transparent pixels follow their alpha (#1289); Arabic draft catalog; truncated text fills its last line before the ellipsis and keeps truncating when resized; auto-height text with max lines (#1375, #1376, #1377), numbers unchanged; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; `.sketch` import, best effort: import/export breadth 86% → 87%, file formats 60% → 61%, headline numbers unchanged; Canvas & navigation's remaining work no longer lists outline mode's Include hidden layers and Include object bounds; boards: area 22 (weight 0, outside the weighted sum); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, iteration marks 〱–〵 and the halfwidth parentheses; Turkish reviewed, Czech and Indonesian drafts, the Japanese draft completed; reviewed Russian catalog and integer plurals; vector edit mode regions: hover hatch, selection and drag; plugin log byte/count limits (#191); core editor leftovers: component playground, auto gap handles, variables inside styles, inner shadows and background blur on groups, command-made text readable on dark pages, a one-step frame/group convert, delays on mouse triggers and manual overlay offsets, wrapped-line alignment; starter templates, a Templates tab and Getting started tips on the home screen: essentials ~57% → ~59%; everyday editing partials: number fields, outline options, Hide when publishing, cursors, panel widths, dark pages, numbers unchanged but menu breadth 211/211; text box sizes measured against documents re-saved by other software: whole-pixel line heights, advances on a 1024-per-em grid, letter spacing between glyphs only, numbers unchanged; .fig export checked by opening written files in other software, numbers unchanged; a public figcraft-server: open hosting, owner tokens, per-address limits, idle expiry, moderation, install.sh; experimental .fig export; keyboard shortcut parity suite and bindings; Simplified Chinese draft catalog; Latin American Spanish overlay; prototyping tail: gamepad triggers, widgets in prototypes, mode lookups; plugin directory on figcraft-server; Japanese and Korean draft catalogs and CJK UI fonts; plugin widgets and the plugin panel tail; French, German and Brazilian Portuguese draft catalogs; cursor chat and spotlight in live sessions; layers and assets panels behaviour suite and fixes; vector multi-edit and edit tail; dev resources links; extended collections tail; branch version history and finer list merges; headline percentages recomputed from the area table: feature breadth ~84%, core ~94%, mainstream ~50%; text lists, hanging punctuation and decoration styles; comments and version history behaviour suite and fixes; canvas navigation, guides and grids behaviour suite and fixes; export and inspect behaviour suite and fixes; .fig import: editable vector networks and more layer kinds; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; styles and variables behaviour suite and fixes; prototyping behaviour suite and fixes; components behaviour suite and fixes; embedded image colour profiles; layers panel keyboard: F2 rename, Shift+F10 context menu, keyboard box selection, 10k-layer QA; per-side stroke weight variables; text behaviour suite: CJK line breaking, metrics, vertical trim; selection and transform behaviour suite and fixes; `.fig` import, best effort; auto layout behaviour suite and fixes; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; localization layer with a draft Spanish catalog; hosting figcraft-server: wss in the desktop app, server releases, deployment guide; plugin panels and settings; canvas fixes: boolean hit testing on the result, group drags, frame outlines and slices; code connect; stretch and scatter brushes, pen pressure; text on a path and pattern fills; team libraries on the server and swap library; branches: create, update from main, review and merge; animated GIF fills and TIFF images; Open recent, outlines for the selection and mask outlines: menu breadth 100%; extended collections, variables import/export, gradient stop and variant bindings; feature breadth ~80%; ready ~49%; last major: full re-measure against Figma desktop 126.10.7; rows for the community batches: Selection colors, smart-selection spacing and a Present tab (#753), `.fig` import fidelity, paste from another design app, a `.fig` copy from Save as; control requests while the window is minimised (#720); catalog counts re-measured; automation roots (#715); number variables in the text content picker (#629); frames and sections convert into each other (#719)) · **Target:** Figma Design (desktop app 126.10.7, macOS)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (glass bends with a thick-lens profile and splits its colours over 8 steps, measured against the reference tool; bulleted lists use the same bullet at every level of indentation, as the help center says, instead of a white bullet and a square at the deeper levels; typing `1)` and a space at the start of a paragraph starts a numbered list, as `1.` does, both being the help center's creation characters; a link on text is underlined by default, as the help center says, and Underline takes the underline off while the link stays; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; gap 6: widgets draw lines and SVG pictures (plugin API 6); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); Thai, Lao, Khmer and Burmese lines break between words (#1219); MCP and control calls name their document (#998); shadows of images with transparent pixels follow their alpha (#1289); Arabic draft catalog; truncated text fills its last line before the ellipsis and keeps truncating when resized; auto-height text with max lines (#1375, #1376, #1377), numbers unchanged; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; `.sketch` import, best effort: import/export breadth 86% → 87%, file formats 60% → 61%, headline numbers unchanged; Canvas & navigation's remaining work no longer lists outline mode's Include hidden layers and Include object bounds; boards: area 22 (weight 0, outside the weighted sum); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, iteration marks 〱–〵 and the halfwidth parentheses; Turkish reviewed, Czech and Indonesian drafts, the Japanese draft completed; reviewed Russian catalog and integer plurals; vector edit mode regions: hover hatch, selection and drag; plugin log byte/count limits (#191); core editor leftovers: component playground, auto gap handles, variables inside styles, inner shadows and background blur on groups, command-made text readable on dark pages, a one-step frame/group convert, delays on mouse triggers and manual overlay offsets, wrapped-line alignment; starter templates, a Templates tab and Getting started tips on the home screen: essentials ~57% → ~59%; everyday editing partials: number fields, outline options, Hide when publishing, cursors, panel widths, dark pages, numbers unchanged but menu breadth 211/211; text box sizes measured against documents re-saved by other software: whole-pixel line heights, advances on a 1024-per-em grid, letter spacing between glyphs only, numbers unchanged; .fig export checked by opening written files in other software, numbers unchanged; a public figcraft-server: open hosting, owner tokens, per-address limits, idle expiry, moderation, install.sh; experimental .fig export; keyboard shortcut parity suite and bindings; Simplified Chinese draft catalog; Latin American Spanish overlay; prototyping tail: gamepad triggers, widgets in prototypes, mode lookups; plugin directory on figcraft-server; Japanese and Korean draft catalogs and CJK UI fonts; plugin widgets and the plugin panel tail; French, German and Brazilian Portuguese draft catalogs; cursor chat and spotlight in live sessions; layers and assets panels behaviour suite and fixes; vector multi-edit and edit tail; dev resources links; extended collections tail; branch version history and finer list merges; headline percentages recomputed from the area table: feature breadth ~84%, core ~94%, mainstream ~50%; text lists, hanging punctuation and decoration styles; comments and version history behaviour suite and fixes; canvas navigation, guides and grids behaviour suite and fixes; export and inspect behaviour suite and fixes; .fig import: editable vector networks and more layer kinds; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; styles and variables behaviour suite and fixes; prototyping behaviour suite and fixes; components behaviour suite and fixes; embedded image colour profiles; layers panel keyboard: F2 rename, Shift+F10 context menu, keyboard box selection, 10k-layer QA; per-side stroke weight variables; text behaviour suite: CJK line breaking, metrics, vertical trim; selection and transform behaviour suite and fixes; `.fig` import, best effort; auto layout behaviour suite and fixes; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; localization layer with a draft Spanish catalog; hosting figcraft-server: wss in the desktop app, server releases, deployment guide; plugin panels and settings; canvas fixes: boolean hit testing on the result, group drags, frame outlines and slices; code connect; stretch and scatter brushes, pen pressure; text on a path and pattern fills; team libraries on the server and swap library; branches: create, update from main, review and merge; animated GIF fills and TIFF images; Open recent, outlines for the selection and mask outlines: menu breadth 100%; extended collections, variables import/export, gradient stop and variant bindings; feature breadth ~80%; ready ~49%; last major: full re-measure against Figma desktop 126.10.7; rows for the community batches: Selection colors, smart-selection spacing and a Present tab (#753), `.fig` import fidelity, paste from another design app, a `.fig` copy from Save as; control requests while the window is minimised (#720); catalog counts re-measured; automation roots (#715); number variables in the text content picker (#629); frames and sections convert into each other (#719)) · **Target:** Figma Design (desktop app 126.10.7, macOS)
 
 The authoritative assessment of how close FigCraft is to Figma Design. [`ROADMAP.md`](../ROADMAP.md)
 summarizes it; [`gaps.md`](gaps.md) is the ranked work list; the measured menu checklist is
@@ -648,6 +648,7 @@ Carried over from the ROADMAP's "Shipped so far" (2026-10-10). The test count th
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-02 | minor | M3, #1885: glass bends the backdrop with the reference tool's thick-lens profile (most a 1-unit bevel in from the edge, falling off as the 3.5th power of the way out of the curve to nothing `depth` further in) and splits its colours over 8 steps, red and blue 0.16 of the bend apart at 100% dispersion. Measured against the reference tool on synthetic files at 2×: the black band a pane pulls to its edge ends within 3 px of the reference tool's, and red and blue part 2.27 px at 50% dispersion and 4.66 px at 100% (2.38 and 4.69 there). Tests: `glass::tests::the_bend_follows_the_thick_lens_profile`, `glass::tests::dispersion_splits_the_channels_along_the_bend`. Grade unchanged. |
 | 2026-11-01 | patch | M4: bulleted lists draw the same bullet at every level of indentation ("Figma bullets will keep the same styling at all levels of indentation", Create bulleted and numbered lists); the deeper levels drew a white bullet and a small square, pinned as silent before. Numbered levels (1., a., i.) are unchanged. Found by a documentation audit of the text rules. Test: `tail_tests::list_numbering_by_level` (the bullets row). Numbers unchanged |
 | 2026-11-01 | patch | M4: typing `1)` followed by a space at the start of a plain paragraph starts a numbered list, as `1.` already did ("Enter one of the creation characters below followed by a Space: 1. 1)", Create bulleted and numbered lists). Found by a documentation audit of the text rules. Test: `text_tail_tests::typing_a_creation_character_and_a_space_starts_a_list`. Numbers unchanged |
 | 2026-11-01 | patch | M4: a link made with `text.link` (Cmd/Ctrl+K, Shift+Cmd/Ctrl+U) underlines the linked text unless it has a decoration of its own ("Links are styled with an underline by default. Use the keyboard shortcut to remove the underline", Add links to text); Underline (Cmd/Ctrl+U) takes the underline off and the link stays. Found by a documentation audit of the text rules. Test: `text_behaviour_tests::a_link_is_underlined_by_default_and_underline_takes_it_off`. Numbers unchanged |