feat: add codex review failover and suppress output hardening

src/session-recovery.test.ts

@@ -1,6 +1,9 @@
 import { describe, expect, it } from 'vitest';
 
-import { shouldResetSessionOnAgentFailure } from './session-recovery.js';
+import {
+  shouldResetSessionOnAgentFailure,
+  shouldRetryFreshSessionOnAgentFailure,
+} from './session-recovery.js';
 
 describe('shouldResetSessionOnAgentFailure', () => {
   it('matches many-image dimension limit errors', () => {
@@ -31,4 +34,45 @@ describe('shouldResetSessionOnAgentFailure', () => {
       }),
     ).toBe(false);
   });
+
+  it('matches thinking signature 400 errors', () => {
+    expect(
+      shouldResetSessionOnAgentFailure({
+        result:
+          'API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.11.content.0: Invalid `signature` in `thinking` block"}}',
+        error: undefined,
+      }),
+    ).toBe(true);
+  });
+});
+
+describe('shouldRetryFreshSessionOnAgentFailure', () => {
+  it('matches stale session errors', () => {
+    expect(
+      shouldRetryFreshSessionOnAgentFailure({
+        result: null,
+        error: 'No conversation found with session ID: stale',
+      }),
+    ).toBe(true);
+  });
+
+  it('matches thinking signature 400 errors', () => {
+    expect(
+      shouldRetryFreshSessionOnAgentFailure({
+        result:
+          'API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.11.content.0: Invalid `signature` in `thinking` block"}}',
+        error: undefined,
+      }),
+    ).toBe(true);
+  });
+
+  it('does not retry image dimension limit errors', () => {
+    expect(
+      shouldRetryFreshSessionOnAgentFailure({
+        result:
+          'An image in the conversation exceeds the dimension limit for many-image requests (2000px). Start a new session with fewer images.',
+        error: undefined,
+      }),
+    ).toBe(false);
+  });
 });