fix: classify withdrawn reply targets

src/outbound/__tests__/errors.test.ts

@@ -28,6 +28,27 @@ describe('classifyError', () => {
     expect(err.code).toBe('target_revoked');
   });
 
+  test('infers target_revoked from a withdrawn-message response without a Feishu code', () => {
+    const err = classifyError({
+      response: {
+        status: 400,
+        data: { message: 'The message was withdrawn.' },
+      },
+    });
+    expect(err.code).toBe('target_revoked');
+    expect(err.message).toBe('The message was withdrawn.');
+  });
+
+  test('does not classify an unrelated HTTP 400 as target_revoked', () => {
+    const err = classifyError({
+      response: {
+        status: 400,
+        data: { message: 'Invalid message format.' },
+      },
+    });
+    expect(err.code).toBe('format_error');
+  });
+
   test('detects ssrf_blocked from error message prefix', () => {
     const err = classifyError(new Error('ssrf_blocked: 10.0.0.1'));
     expect(err.code).toBe('ssrf_blocked');

src/outbound/errors.ts

@@ -19,14 +19,19 @@ function inferCode(err: unknown): LarkChannelErrorCode {
   const raw = err as any;
   const status = raw?.response?.status ?? raw?.status;
   const feishuCode = raw?.response?.data?.code ?? raw?.data?.code ?? raw?.code;
-  const msg = String(raw?.message ?? '').toLowerCase();
+  const msg = extractMessage(err).toLowerCase();
 
   if (typeof feishuCode === 'number') {
     if (feishuCode === 230020 || feishuCode === 230017) return 'target_revoked';
     if (feishuCode === 99991400 || feishuCode === 99991401) return 'permission_denied';
     if (feishuCode === 230002 || feishuCode === 230001) return 'format_error';
   }
 
+  // Feishu can return HTTP 400 without a numeric platform code when the
+  // message targeted by a reply has already been withdrawn. Classify the
+  // platform message before the generic HTTP 400 fallback.
+  if (/\bmessage\b.*\b(withdrawn|recalled)\b/.test(msg)) return 'target_revoked';
+
   if (status === 429) return 'rate_limited';
   if (status === 401 || status === 403) return 'permission_denied';
   if (status === 400) return 'format_error';