diff --git a/crates/schema/public/enums/src/by_table/media_files/media_file_project_type.rs b/crates/schema/public/enums/src/by_table/media_files/media_file_project_type.rs
new file mode 100644
index 0000000000..1e9866d209
--- /dev/null
+++ b/crates/schema/public/enums/src/by_table/media_files/media_file_project_type.rs
@@ -0,0 +1,155 @@
+use std::collections::BTreeSet;
+
+#[cfg(test)]
+use strum::EnumCount;
+#[cfg(test)]
+use strum::EnumIter;
+use utoipa::ToSchema;
+
+/// Used in the `media_files` table in the nullable `maybe_project_type`
+/// VARCHAR(32) field.
+///
+/// Identifies which kind of internal Artcraft project document a media file is.
+/// Only set when `media_class = 'project'`. The file format lives in
+/// `media_type` (`json` / legacy `scene_json`); the JSON payload carries its
+/// own schema version.
+///
+/// DO NOT CHANGE VALUES WITHOUT A MIGRATION STRATEGY.
+#[cfg_attr(test, derive(EnumIter, EnumCount))]
+#[derive(Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash, Deserialize, Serialize, ToSchema)]
+#[serde(rename_all = "snake_case")]
+pub enum MediaFileProjectType {
+  /// 3D editor scene descriptor: objects with locations, skyboxes, animations,
+  /// etc. — a full editable 3D scene.
+  /// NB: serde's snake_case renames this to "scene3d" (no underscore before
+  /// the digit), so the rename must be explicit.
+  #[serde(rename = "scene_3d")]
+  Scene3d,
+
+  /// Mood board: a collection of images on a lightweight graph.
+  MoodBoard,
+
+  /// Graph workflow: a node-graph pipeline of image and video generation steps.
+  Workflow,
+
+  /// Video editor project: a nonlinear video editing timeline.
+  VideoTimeline,
+}
+
+impl_enum_display_and_debug_using_to_str!(MediaFileProjectType);
+impl_mysql_enum_coders!(MediaFileProjectType);
+impl_mysql_from_row!(MediaFileProjectType);
+
+impl MediaFileProjectType {
+  pub const fn to_str(&self) -> &'static str {
+    match self {
+      Self::Scene3d => "scene_3d",
+      Self::MoodBoard => "mood_board",
+      Self::Workflow => "workflow",
+      Self::VideoTimeline => "video_timeline",
+    }
+  }
+
+  pub fn from_str(value: &str) -> Result<Self, String> {
+    match value {
+      "scene_3d" => Ok(Self::Scene3d),
+      "mood_board" => Ok(Self::MoodBoard),
+      "workflow" => Ok(Self::Workflow),
+      "video_timeline" => Ok(Self::VideoTimeline),
+      _ => Err(format!("invalid value: {:?}", value)),
+    }
+  }
+
+  pub fn all_variants() -> BTreeSet<Self> {
+    // NB: BTreeSet is sorted
+    BTreeSet::from([
+      Self::Scene3d,
+      Self::MoodBoard,
+      Self::Workflow,
+      Self::VideoTimeline,
+    ])
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::by_table::media_files::media_file_project_type::MediaFileProjectType;
+  use crate::test_helpers::assert_serialization;
+
+  mod serde {
+    use super::*;
+
+    #[test]
+    fn test_serialization() {
+      assert_serialization(MediaFileProjectType::Scene3d, "scene_3d");
+      assert_serialization(MediaFileProjectType::MoodBoard, "mood_board");
+      assert_serialization(MediaFileProjectType::Workflow, "workflow");
+      assert_serialization(MediaFileProjectType::VideoTimeline, "video_timeline");
+    }
+  }
+
+  mod impl_methods {
+    use super::*;
+
+    #[test]
+    fn to_str() {
+      assert_eq!(MediaFileProjectType::Scene3d.to_str(), "scene_3d");
+      assert_eq!(MediaFileProjectType::MoodBoard.to_str(), "mood_board");
+      assert_eq!(MediaFileProjectType::Workflow.to_str(), "workflow");
+      assert_eq!(MediaFileProjectType::VideoTimeline.to_str(), "video_timeline");
+    }
+
+    #[test]
+    fn from_str() {
+      assert_eq!(MediaFileProjectType::from_str("scene_3d").unwrap(), MediaFileProjectType::Scene3d);
+      assert_eq!(MediaFileProjectType::from_str("mood_board").unwrap(), MediaFileProjectType::MoodBoard);
+      assert_eq!(MediaFileProjectType::from_str("workflow").unwrap(), MediaFileProjectType::Workflow);
+      assert_eq!(MediaFileProjectType::from_str("video_timeline").unwrap(), MediaFileProjectType::VideoTimeline);
+      assert!(MediaFileProjectType::from_str("foo").is_err());
+    }
+  }
+
+  mod manual_variant_checks {
+    use super::*;
+
+    #[test]
+    fn all_variants() {
+      let mut variants = MediaFileProjectType::all_variants();
+      assert_eq!(variants.len(), 4);
+      assert_eq!(variants.pop_first(), Some(MediaFileProjectType::Scene3d));
+      assert_eq!(variants.pop_first(), Some(MediaFileProjectType::MoodBoard));
+      assert_eq!(variants.pop_first(), Some(MediaFileProjectType::Workflow));
+      assert_eq!(variants.pop_first(), Some(MediaFileProjectType::VideoTimeline));
+      assert_eq!(variants.pop_first(), None);
+    }
+  }
+
+  mod mechanical_checks {
+    use super::*;
+
+    #[test]
+    fn variant_length() {
+      use strum::IntoEnumIterator;
+      assert_eq!(MediaFileProjectType::all_variants().len(), MediaFileProjectType::iter().len());
+    }
+
+    #[test]
+    fn round_trip() {
+      for variant in MediaFileProjectType::all_variants() {
+        assert_eq!(variant, MediaFileProjectType::from_str(variant.to_str()).unwrap());
+        assert_eq!(variant, MediaFileProjectType::from_str(&format!("{}", variant)).unwrap());
+        assert_eq!(variant, MediaFileProjectType::from_str(&format!("{:?}", variant)).unwrap());
+      }
+    }
+
+    #[test]
+    fn serialized_length_ok_for_database() {
+      const MAX_LENGTH : usize = 32;
+      for variant in MediaFileProjectType::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);
+      }
+    }
+  }
+}