Handle empty Codex worker shutdown

Treat a never-used app-server thread with no rollout file as already archived while retaining real archive failures.\n\nAI-assisted: OpenAI Codex.

skill/scripts/live/codex-worker-supervisor.mjs

@@ -314,7 +314,12 @@ export class CodexLiveWorkerSupervisor {
         await this.client.archiveThread(this.thread.id);
         archived = true;
       } catch (error) {
-        this.log(`thread archive failed: ${error.message}`);
+        if (/no rollout found/i.test(String(error?.message || ''))) {
+          archived = true;
+          this.log('empty worker thread had no persisted rollout; treating it as archived');
+        } else {
+          this.log(`thread archive failed: ${error.message}`);
+        }
       }
     }
     await this.client.close().catch(() => {});

tests/live-codex-worker-supervisor.test.mjs

@@ -208,6 +208,17 @@ describe('Codex Live worker supervisor ownership and lifecycle', () => {
     assert.equal(state.archived, false);
   });
 
+  it('treats an unused thread with no persisted rollout as already archived', async () => {
+    const cwd = mkdtempSync(path.join(tmpdir(), 'codex-supervisor-empty-thread-'));
+    const statePath = path.join(cwd, 'state.json');
+    const client = fakeClient();
+    client.archiveThread = async () => { throw new Error('thread/archive: no rollout found for thread id empty'); };
+    const supervisor = createSupervisor({ cwd, statePath, client });
+    supervisor.thread = { id: 'empty' };
+    await supervisor.shutdown({ archive: true });
+    assert.equal(JSON.parse(readFileSync(statePath, 'utf-8')).status, 'archived');
+  });
+
   it('publishes progressive source checkpoints only through the fenced publisher', async () => {
     const cwd = mkdtempSync(path.join(tmpdir(), 'codex-supervisor-publish-'));
     mkdirSync(path.join(cwd, 'src'), { recursive: true });