The engine notes when a drag has only moved the selected layers by one offset (Interaction::moved_by); the canvas keeps the outlines, box and slots from the drag's start document and shifts them, the selection spacing and the Design panel's values (but the position fields) come from that document, and the Export section's values are kept. Dragging 648 layers: UI pass 2.10 to 1.44 ms a frame.
A panic in a Session::grouped closure outside any command skipped the group rollback: the
documents stayed half edited, the history limit unbounded, live documents held and the group
depth raised. checkpointed now catches the unwind, runs the same rollback as a failed group and
resumes the panic, so the caller's guard still reports it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Co-Authored-By: GPT-6.1 Sol <noreply@openai.com>
Co-Authored-By: GPT-6 Astra <noreply@openai.com>
Comments become the task queue for an attached or headless MCP client: comment.prompt returns a bounded Markdown brief, the Comments panel gains Copy for AI, and the MCP server exposes fix_comments, watch_comments, figcraft://comments and wait_for_changes. Mutating comment.* commands append to a bounded in-memory event log; the control channel's events.poll long-polls it without the UI thread, and a successful batch commits its events only if the whole batch lands. No model, network dependency, asset or file-format change.
Session::grouped saved only the undo stack's length, so a failed group could drop the entries it
added but not bring back the ones an edit.undo inside it popped. It now keeps each document's undo
entries on entry, as it already did for redo, and restores them when the group fails.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Co-Authored-By: GPT-6.1 Sol <noreply@openai.com>
Co-Authored-By: GPT-6 Astra <noreply@openai.com>
command.batch and the MCP batch tool take onError: "abort" (the default, unchanged) or
"continue". In continue mode each step runs inside a rollback-only checkpoint split out of
Session::grouped: a failed step is rolled back on its own, later steps still run, and the result
is one {step, command, ok, result|error} object per step. What was applied is one undo step; a
reference to a failed step fails too; malformed batches are still rejected before any step runs.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Co-Authored-By: GPT-6.1 Sol <noreply@openai.com>
Co-Authored-By: GPT-6 Astra <noreply@openai.com>
NetterSilverandClaude Opus 5.5
BFlat
Dylan M. Taylor
phonedu
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