diff --git a/src/cli/commands/assistants/chat/index.ts b/src/cli/commands/assistants/chat/index.ts
index f28748f12..20a07ff92 100644
--- a/src/cli/commands/assistants/chat/index.ts
+++ b/src/cli/commands/assistants/chat/index.ts
@@ -419,6 +419,21 @@ async function handleChatError(error: unknown, config: ProviderProfile): Promise
   const context = createErrorContext(error);
   logger.error('Assistant chat API call failed', context);
 
+  // Log the actual error details for debugging (instead of [object Object])
+  if (error instanceof Error) {
+    logger.error('Assistant chat error details', {
+      message: error.message,
+      name: error.name,
+      code: (error as any).code,
+      stack: error.stack
+    });
+  } else {
+    logger.error('Assistant chat error details (non-Error)', {
+      error: String(error),
+      type: typeof error
+    });
+  }
+
   if (error instanceof Error && (error.message.includes('401') || error.message.includes('403'))) {
     await promptReauthentication(config);
   }
diff --git a/src/migrations/__tests__/migration-runner-ordering.test.ts b/src/migrations/__tests__/migration-runner-ordering.test.ts
index 2c8b3af4c..9176bd1dd 100644
--- a/src/migrations/__tests__/migration-runner-ordering.test.ts
+++ b/src/migrations/__tests__/migration-runner-ordering.test.ts
@@ -85,7 +85,14 @@ afterEach(async () => {
   openLoggers = [];
   if (originalCodemieHome !== undefined) process.env.CODEMIE_HOME = originalCodemieHome;
   else delete process.env.CODEMIE_HOME;
-  rmSync(tmpHome, { recursive: true, force: true });
+  // Windows can still hold log file handles briefly after stream.end(); force +
+  // maxRetries only suppress ENOENT, so treat residual ENOTEMPTY/EBUSY as
+  // best-effort teardown (matches claude.metrics-processor-names.test.ts).
+  try {
+    rmSync(tmpHome, { recursive: true, force: true, maxRetries: 5, retryDelay: 100 });
+  } catch {
+    /* ignore temp-dir cleanup races */
+  }
   vi.restoreAllMocks();
 });