sync: update from private repo (6fcb0d0)

src/bridge/local-tasks-api.ts

@@ -18,8 +18,12 @@ export interface LocalTasksApiOptions {
    * Server-side validator for piece names accepted by the
    * /continue endpoint. Returns true if the piece is loadable.
    * When unset, /continue rejects all requests with 500 (misconfiguration).
+   *
+   * `ownerId` is the task owner's user id; when provided the implementation
+   * MUST also check the owner's per-user piece dir so that user-custom pieces
+   * are accepted (matching the resolution order the worker uses at run time).
    */
-  pieceExists?: (name: string) => boolean;
+  pieceExists?: (name: string, ownerId?: string) => boolean;
   /**
    * Optional. When set, accepting browserSessionProfileId on task create
    * verifies the profile belongs to the requesting user. Without it, the
@@ -506,7 +510,7 @@ export function mountLocalTasksApi(app: Application, opts: LocalTasksApiOptions)
         res.status(500).json({ error: 'piece_validation_unavailable' });
         return;
       }
-      if (!opts.pieceExists(piece)) {
+      if (!opts.pieceExists(piece, task?.ownerId ?? undefined)) {
         res.status(400).json({ error: 'piece_not_found', piece });
         return;
       }