feat(control): expose external-change actions

src/app/control/actions.rs

@@ -69,6 +69,16 @@ pub(crate) fn property_json(p: &crate::scene::model::object::Property) -> Value
 }
 pub(super) const NAMES: &[&str] = &[
     "close_modal",
+    // Native-only: the "changed outside" dialog does not exist in the web
+    // build, so neither does its action set.
+    #[cfg(not(target_arch = "wasm32"))]
+    "external_change_reload",
+    #[cfg(not(target_arch = "wasm32"))]
+    "external_change_overwrite",
+    #[cfg(not(target_arch = "wasm32"))]
+    "external_change_save_as",
+    #[cfg(not(target_arch = "wasm32"))]
+    "external_change_cancel",
     "pdf_dialog_ok",
     "pdf_layer_toggle",
     "pc_manager_toggle",
@@ -974,6 +984,17 @@ impl OpenCADStudio {
         let name = string(req, "name")?;
         let msg = match name {
             "close_modal" => Message::CloseModal,
+            // The "changed outside" modal's suggested actions (D6): reload
+            // the disk copy, keep the in-memory one and overwrite, save as,
+            // or dismiss. Native only — the web build has no such dialog.
+            #[cfg(not(target_arch = "wasm32"))]
+            "external_change_reload" => Message::ExternalChangeReload,
+            #[cfg(not(target_arch = "wasm32"))]
+            "external_change_overwrite" => Message::ExternalChangeOverwrite,
+            #[cfg(not(target_arch = "wasm32"))]
+            "external_change_save_as" => Message::ExternalChangeSaveAs,
+            #[cfg(not(target_arch = "wasm32"))]
+            "external_change_cancel" => Message::ExternalChangeCancel,
             // The open PDF dialog's OK button.
             // Underlay Layers: switch a layer of the shown underlay.
             "pdf_layer_toggle" => Message::PdfDialog(

src/app/control/mod.rs

@@ -1763,6 +1763,30 @@ mod tests {
         stale["request_id"] = json!("stale");
         assert_eq!(app.control_request(stale).0["code"], "stale_state");
     }
+    #[test]
+    fn external_change_modal_actions_are_automatable() {
+        let mut app = OpenCADStudio::new_for_test();
+        let names = crate::app::automation_action_names();
+        for name in [
+            "external_change_reload",
+            "external_change_overwrite",
+            "external_change_save_as",
+            "external_change_cancel",
+        ] {
+            assert!(names.contains(&name), "{name} should be listed");
+        }
+        // No conflict pending: the action is a harmless no-op, not an error.
+        let reply = request(
+            &mut app,
+            json!({
+                "op":"action",
+                "request_id":"external-action-noop",
+                "name":"external_change_reload"
+            }),
+        );
+        assert_eq!(reply["status"], "completed", "{reply}");
+    }
+
     #[test]
     fn control_errors_and_missing_entities_do_not_report_success() {
         let mut app = OpenCADStudio::new_for_test();

src/mcp.rs

@@ -29,7 +29,7 @@ const MODERN_PROTOCOL_VERSION: &str = "2026-07-28";
 /// changes, so schema drift (new params, renamed tools) is always a conscious,
 /// reviewed edit — and clients can detect a stale bridge by comparing digests.
 #[cfg(test)]
-const TOOL_SCHEMA_DIGEST: &str = "8dc370c3e4bde86a3c2f6be8488dd1ed318850303326b00e2c28e8c033006472";
+const TOOL_SCHEMA_DIGEST: &str = "e7bd01696f57143d7139aeb75d53389450b1102b603f2ba4ace8122cc692070e";
 const MAX_REQUEST: usize = 1_048_576;
 const MAX_RESPONSE: u64 = 16 * 1024 * 1024;
 const CACHE_TTL_MS: u64 = 3_600_000;