diff --git a/_sql/migrations/2025-07-23-031628_alter_prompts_add_service/down.sql b/_sql/migrations/2025-07-23-031628_alter_prompts_add_service/down.sql
deleted file mode 100644
index d9a93fe9a1..0000000000
--- a/_sql/migrations/2025-07-23-031628_alter_prompts_add_service/down.sql
+++ /dev/null
@@ -1 +0,0 @@
--- This file should undo anything in `up.sql`
diff --git a/_sql/migrations/2025-07-23-031628_alter_prompts_add_service/up.sql b/_sql/migrations/2025-07-23-031628_alter_prompts_add_service/up.sql
deleted file mode 100644
index b37f10d95f..0000000000
--- a/_sql/migrations/2025-07-23-031628_alter_prompts_add_service/up.sql
+++ /dev/null
@@ -1 +0,0 @@
--- Your SQL goes here
diff --git a/_sql/migrations/2025-07-23-031631_alter_prompts_add_model/down.sql b/_sql/migrations/2025-07-23-031631_alter_prompts_add_model/down.sql
index d9a93fe9a1..8418efe04a 100644
--- a/_sql/migrations/2025-07-23-031631_alter_prompts_add_model/down.sql
+++ b/_sql/migrations/2025-07-23-031631_alter_prompts_add_model/down.sql
@@ -1 +1,5 @@
--- This file should undo anything in `up.sql`
+-- noinspection SqlDialectInspectionForFile
+-- noinspection SqlNoDataSourceInspectionForFile
+-- noinspection SqlResolveForFile
+
+ALTER TABLE prompts DROP COLUMN maybe_model_type;
diff --git a/_sql/migrations/2025-07-23-031631_alter_prompts_add_model/up.sql b/_sql/migrations/2025-07-23-031631_alter_prompts_add_model/up.sql
index b37f10d95f..b371789846 100644
--- a/_sql/migrations/2025-07-23-031631_alter_prompts_add_model/up.sql
+++ b/_sql/migrations/2025-07-23-031631_alter_prompts_add_model/up.sql
@@ -1 +1,6 @@
--- Your SQL goes here
+-- noinspection SqlDialectInspectionForFile
+-- noinspection SqlNoDataSourceInspectionForFile
+-- noinspection SqlResolveForFile
+
+ALTER TABLE prompts
+    ADD COLUMN maybe_model_type VARCHAR(32) DEFAULT NULL;
diff --git a/_sql/migrations/2025-07-23-031650_alter_prompts_add_provider/down.sql b/_sql/migrations/2025-07-23-031650_alter_prompts_add_provider/down.sql
new file mode 100644
index 0000000000..5aa3a2d278
--- /dev/null
+++ b/_sql/migrations/2025-07-23-031650_alter_prompts_add_provider/down.sql
@@ -0,0 +1,5 @@
+-- noinspection SqlDialectInspectionForFile
+-- noinspection SqlNoDataSourceInspectionForFile
+-- noinspection SqlResolveForFile
+
+ALTER TABLE prompts DROP COLUMN maybe_generation_provider;
diff --git a/_sql/migrations/2025-07-23-031650_alter_prompts_add_provider/up.sql b/_sql/migrations/2025-07-23-031650_alter_prompts_add_provider/up.sql
new file mode 100644
index 0000000000..35c7ea064f
--- /dev/null
+++ b/_sql/migrations/2025-07-23-031650_alter_prompts_add_provider/up.sql
@@ -0,0 +1,6 @@
+-- noinspection SqlDialectInspectionForFile
+-- noinspection SqlNoDataSourceInspectionForFile
+-- noinspection SqlResolveForFile
+
+ALTER TABLE prompts
+    ADD COLUMN maybe_generation_provider VARCHAR(16) DEFAULT NULL;
diff --git a/_sql/migrations/2025-07-23-031720_alter_prompts_add_maybe_anonymous_visitor_token/down.sql b/_sql/migrations/2025-07-23-031720_alter_prompts_add_maybe_anonymous_visitor_token/down.sql
index d9a93fe9a1..b995da02c2 100644
--- a/_sql/migrations/2025-07-23-031720_alter_prompts_add_maybe_anonymous_visitor_token/down.sql
+++ b/_sql/migrations/2025-07-23-031720_alter_prompts_add_maybe_anonymous_visitor_token/down.sql
@@ -1 +1,5 @@
--- This file should undo anything in `up.sql`
+-- noinspection SqlDialectInspectionForFile
+-- noinspection SqlNoDataSourceInspectionForFile
+-- noinspection SqlResolveForFile
+
+ALTER TABLE prompts DROP COLUMN maybe_anonymous_visitor_token;
diff --git a/_sql/migrations/2025-07-23-031720_alter_prompts_add_maybe_anonymous_visitor_token/up.sql b/_sql/migrations/2025-07-23-031720_alter_prompts_add_maybe_anonymous_visitor_token/up.sql
index b37f10d95f..749748148f 100644
--- a/_sql/migrations/2025-07-23-031720_alter_prompts_add_maybe_anonymous_visitor_token/up.sql
+++ b/_sql/migrations/2025-07-23-031720_alter_prompts_add_maybe_anonymous_visitor_token/up.sql
@@ -1 +1,6 @@
--- Your SQL goes here
+-- noinspection SqlDialectInspectionForFile
+-- noinspection SqlNoDataSourceInspectionForFile
+-- noinspection SqlResolveForFile
+
+ALTER TABLE prompts
+    ADD COLUMN maybe_anonymous_visitor_token VARCHAR(32) DEFAULT NULL;
diff --git a/_sql/migrations_squashed/prompts.sql b/_sql/migrations_squashed/prompts.sql
index 5967b182a1..b7f01e6cff 100644
--- a/_sql/migrations_squashed/prompts.sql
+++ b/_sql/migrations_squashed/prompts.sql
@@ -19,22 +19,24 @@ CREATE TABLE prompts (
   -- Original product to which the prompt applied.
   -- Prompts may or may not be compatible across products.
   -- Possible values:
-  --  * 'stable_diffusion'
-  --  * 'comfy_ui'
+  --  * 'stable_diffusion' (legacy)
+  --  * 'comfy_ui' (legacy)
+  --  * 'artcraft_app'
   prompt_type VARCHAR(16) NOT NULL,
 
-  -- What service provided the generation.
-  maybe_generation_provider VARCHAR(16) NOT NULL,
-
   -- What type of model was used to generate the result.
   -- NB: We're conflating prompts with outputs, but in a
   -- sense the model is inextricably part of the prompt.
   maybe_model_type VARCHAR(32) DEFAULT NULL,
 
-  -- Whomever created the prompt
+  -- What service provided the generation.
+  maybe_generation_provider VARCHAR(16) NOT NULL,
+
+  -- Whoever created the prompt
   maybe_creator_user_token VARCHAR(32) DEFAULT NULL,
 
-  -- TODO: maybe_anonymous_visitor_token VARCHAR(32) DEFAULT NULL,
+  -- Whoever created the prompt (anonymous user tracking)
+  maybe_anonymous_visitor_token VARCHAR(32) DEFAULT NULL,
 
   -- ========== PROMPT DETAILS ==========
 
diff --git a/crates/schema/public/enums/src/by_table/media_files/media_file_origin_model_type.rs b/crates/schema/public/enums/src/by_table/media_files/media_file_origin_model_type.rs
index 97785d24a0..20903fb620 100644
--- a/crates/schema/public/enums/src/by_table/media_files/media_file_origin_model_type.rs
+++ b/crates/schema/public/enums/src/by_table/media_files/media_file_origin_model_type.rs
@@ -259,7 +259,8 @@ mod tests {
 
     #[test]
     fn serialized_length_ok_for_database() {
-      const MAX_LENGTH : usize = 32;
+      // NB: The media_files table has allocated width for VARCHAR(32), but let's slim it down to 24.
+      const MAX_LENGTH : usize = 24;
       for variant in MediaFileOriginModelType::all_variants() {
         let serialized = variant.to_str();
         assert!(serialized.len() > 0, "variant {:?} is too short", variant);
diff --git a/crates/schema/public/enums/src/common/generation_provider.rs b/crates/schema/public/enums/src/common/generation_provider.rs
index e68dcdbc80..dfbe54d729 100644
--- a/crates/schema/public/enums/src/common/generation_provider.rs
+++ b/crates/schema/public/enums/src/common/generation_provider.rs
@@ -6,6 +6,8 @@ use strum::EnumCount;
 use strum::EnumIter;
 use utoipa::ToSchema;
 
+/// NB: This will be used by a variety of tables (MySQL and sqlite)!
+/// Keep the max length to 16 characters.
 #[cfg_attr(test, derive(EnumIter, EnumCount))]
 #[derive(Clone, Copy, PartialEq, Eq, Hash, Ord, PartialOrd, Serialize, Deserialize, ToSchema)]
 #[serde(rename_all = "snake_case")]
diff --git a/crates/schema/public/enums/src/common/mod.rs b/crates/schema/public/enums/src/common/mod.rs
index 0faef0e279..d7ca9ac06b 100644
--- a/crates/schema/public/enums/src/common/mod.rs
+++ b/crates/schema/public/enums/src/common/mod.rs
@@ -1,6 +1,7 @@
 pub mod generation_provider;
 pub mod job_status;
 pub mod job_status_plus;
+pub mod model_type;
 pub mod sqlite;
 pub mod view_as;
 pub mod visibility;
diff --git a/crates/schema/public/enums/src/common/model_type.rs b/crates/schema/public/enums/src/common/model_type.rs
new file mode 100644
index 0000000000..3569b49100
--- /dev/null
+++ b/crates/schema/public/enums/src/common/model_type.rs
@@ -0,0 +1,124 @@
+use std::collections::BTreeSet;
+
+#[cfg(test)]
+use strum::EnumCount;
+#[cfg(test)]
+use strum::EnumIter;
+use utoipa::ToSchema;
+
+/// NB: This will be used by a variety of tables (MySQL and sqlite)!
+/// Keep the max length to 24 characters.
+#[cfg_attr(test, derive(EnumIter, EnumCount))]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Ord, PartialOrd, Serialize, Deserialize, ToSchema)]
+#[serde(rename_all = "snake_case")]
+pub enum ModelType {
+  Artcraft,
+  Fal,
+  Sora,
+}
+
+impl_enum_display_and_debug_using_to_str!(ModelType);
+impl_mysql_enum_coders!(ModelType);
+impl_mysql_from_row!(ModelType);
+
+// NB: We can derive `sqlx::Type` instead of using `impl_mysql_enum_coders`
+
+impl ModelType {
+  pub fn to_str(&self) -> &'static str {
+    match self {
+      Self::Artcraft => "artcraft",
+      Self::Fal => "fal",
+      Self::Sora => "sora",
+    }
+  }
+
+  pub fn from_str(job_status: &str) -> Result<Self, String> {
+    match job_status {
+      "artcraft" => Ok(Self::Artcraft),
+      "fal" => Ok(Self::Fal),
+      "sora" => Ok(Self::Sora),
+      _ => Err(format!("invalid task_state: {:?}", job_status)),
+    }
+  }
+
+  pub fn all_variants() -> BTreeSet<Self> {
+    // NB: BTreeSet is sorted
+    // NB: BTreeSet::from() isn't const, but not worth using LazyStatic, etc.
+    BTreeSet::from([
+      Self::Artcraft,
+      Self::Fal,
+      Self::Sora,
+    ])
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::common::model_type::ModelType;
+  use crate::test_helpers::assert_serialization;
+
+  mod explicit_checks {
+    use super::*;
+
+    #[test]
+    fn test_serialization() {
+      assert_serialization(ModelType::Artcraft, "artcraft");
+      assert_serialization(ModelType::Fal, "fal");
+      assert_serialization(ModelType::Sora, "sora");
+    }
+
+    #[test]
+    fn to_str() {
+      assert_eq!(ModelType::Artcraft.to_str(), "artcraft");
+      assert_eq!(ModelType::Fal.to_str(), "fal");
+      assert_eq!(ModelType::Sora.to_str(), "sora");
+    }
+
+    #[test]
+    fn from_str() {
+      assert_eq!(ModelType::from_str("artcraft").unwrap(), ModelType::Artcraft);
+      assert_eq!(ModelType::from_str("fal").unwrap(), ModelType::Fal);
+      assert_eq!(ModelType::from_str("sora").unwrap(), ModelType::Sora);
+    }
+
+    #[test]
+    fn all_variants() {
+      let mut variants = ModelType::all_variants();
+      assert_eq!(variants.len(), 3);
+      assert_eq!(variants.pop_first(), Some(ModelType::Artcraft));
+      assert_eq!(variants.pop_first(), Some(ModelType::Fal));
+      assert_eq!(variants.pop_first(), Some(ModelType::Sora));
+      assert_eq!(variants.pop_first(), None);
+    }
+  }
+
+  mod mechanical_checks {
+    use super::*;
+
+    #[test]
+    fn variant_length() {
+      use strum::IntoEnumIterator;
+      assert_eq!(ModelType::all_variants().len(), ModelType::iter().len());
+    }
+
+    #[test]
+    fn round_trip() {
+      for variant in ModelType::all_variants() {
+        // Test to_str(), from_str(), Display, and Debug.
+        assert_eq!(variant, ModelType::from_str(variant.to_str()).unwrap());
+        assert_eq!(variant, ModelType::from_str(&format!("{}", variant)).unwrap());
+        assert_eq!(variant, ModelType::from_str(&format!("{:?}", variant)).unwrap());
+      }
+    }
+
+    #[test]
+    fn serialized_length_ok_for_database() {
+      const MAX_LENGTH : usize = 24;
+      for variant in ModelType::all_variants() {
+        let serialized = variant.to_str();
+        assert!(serialized.len() > 0, "variant {:?} is too short", variant);
+        assert!(serialized.len() <= MAX_LENGTH, "variant {:?} is too long", variant);
+      }
+    }
+  }
+}