test(FN-4948): assert guard wiring and cleanup behavior

Fusion-Task-Id: FN-4948
Fusion-Task-Lineage: dc622643-4c3e-4217-9219-a6a6e5424427

packages/engine/src/__tests__/executor-worktree.test.ts

@@ -36,6 +36,7 @@ import {
   mockedIsUsableTaskWorktree,
   mockedClassifyStaleLock,
   mockedTryRemoveStaleLock,
+  mockedInstallTaskWorktreeIdentityGuard,
   mockExecuteAll,
   mockTerminateAllSessions,
   mockCleanup,
@@ -2155,6 +2156,9 @@ describe("TaskExecutor worktree pool integration", () => {
       (c) => typeof c[0] === "string" && (c[0] as string).includes("worktree add"),
     );
     expect(worktreeAddCalls.length).toBeGreaterThan(0);
+    expect(mockedInstallTaskWorktreeIdentityGuard).toHaveBeenCalledWith(
+      expect.objectContaining({ taskId: "FN-020" }),
+    );
 
     // Should log worktree creation, NOT pool acquisition
     expect(store.logEntry).toHaveBeenCalledWith(

packages/engine/src/__tests__/step-session-executor.test.ts

@@ -1173,7 +1173,9 @@ describe("StepSessionExecutor", () => {
         expect.stringContaining("git worktree add"),
         expect.anything(),
       );
-      expect(mockedInstallTaskWorktreeIdentityGuard).toHaveBeenCalled();
+      expect(mockedInstallTaskWorktreeIdentityGuard).toHaveBeenCalledWith(
+        expect.objectContaining({ taskId: "FN-001" }),
+      );
     });
 
     it("handles parallel step failure: successful step cherry-picked, failed cleaned up", async () => {