diff --git a/apps/desktop/src/i18n/en.ts b/apps/desktop/src/i18n/en.ts
index 126de0b..64283b9 100644
--- a/apps/desktop/src/i18n/en.ts
+++ b/apps/desktop/src/i18n/en.ts
@@ -453,6 +453,7 @@ export const en = {
   'ai.dirty': 'Uncommitted files in the app folder ({count}): commit or stash them first, so Undo can restore exactly what the AI changes.',
   'ai.noGit': 'The app folder is not in a git repository: Fix with AI needs git for the diff and Undo.',
   'ai.cancelled': 'Cancelled',
+  'ai.signedOut': 'Claude Code is not signed in: run claude once in a terminal and sign in with /login, or copy the prompt for your AI agent',
   'ai.timedOut': 'Stopped after 10 minutes',
   'ai.noChanges': 'No files changed',
   'ai.changed': 'Changed files: {count}',
diff --git a/apps/desktop/src/i18n/tr.ts b/apps/desktop/src/i18n/tr.ts
index 9a27102..fd814f4 100644
--- a/apps/desktop/src/i18n/tr.ts
+++ b/apps/desktop/src/i18n/tr.ts
@@ -455,6 +455,7 @@ export const tr: Record<keyof typeof en, string> = {
   'ai.dirty': 'Uygulama klasöründe commit edilmemiş {count} dosya var: önce commit et ya da stash yap ki Geri al tam olarak yapay zekânın değiştirdiğini geri yüklesin.',
   'ai.noGit': 'Uygulama klasörü bir git deposunda değil: Yapay zekâyla düzelt fark ve Geri al için git ister.',
   'ai.cancelled': 'İptal edildi',
+  'ai.signedOut': 'Claude Code oturum açmamış: bir terminalde claude çalıştırıp /login ile giriş yapın ya da istemi yapay zekâ ajanınız için kopyalayın',
   'ai.timedOut': '10 dakika sonra durduruldu',
   'ai.noChanges': 'Hiçbir dosya değişmedi',
   'ai.changed': 'Değişen dosya: {count}',
diff --git a/apps/desktop/src/ui/AiFix.tsx b/apps/desktop/src/ui/AiFix.tsx
index d0c85d4..b864dcd 100644
--- a/apps/desktop/src/ui/AiFix.tsx
+++ b/apps/desktop/src/ui/AiFix.tsx
@@ -90,7 +90,9 @@ export function AiFix({ projectId, f, claude, busy, setBusy, rescan, stillThere,
   );
   else if (p.kind === 'done') {
     const o = p.run.outcome;
-    const head = o.cancelled ? t('ai.cancelled') : o.timed_out ? t('ai.timedOut') : !p.run.changes.length ? t('ai.noChanges') : t('ai.changed', { count: p.run.changes.length });
+    // a claude CLI that is not signed in answers at once ("Not logged in · Please run /login"): say so, offer the copy
+    const signedOut = !p.run.changes.length && signedOutText(o.summary);
+    const head = o.cancelled ? t('ai.cancelled') : o.timed_out ? t('ai.timedOut') : signedOut ? t('ai.signedOut') : !p.run.changes.length ? t('ai.noChanges') : t('ai.changed', { count: p.run.changes.length });
     panel = (
       <div className="ai-panel" role="status">
         <span className="li-sub">{head}{p.run.changes.length > 0 && !p.undone ? ` · ${stillThere ? t('ai.stillThere') : t('ai.gone')}` : ''}</span>
@@ -100,6 +102,7 @@ export function AiFix({ projectId, f, claude, busy, setBusy, rescan, stillThere,
           <div className="row">
             {p.run.changes.length > 0 && <button className="btn btn-sm btn-primary" onClick={() => setP({ kind: 'idle' })}><Icon name="check" />{t('ai.keep')}</button>}
             {p.run.changes.length > 0 && <button className="btn btn-sm" onClick={() => undo(p.run)}><Icon name="rotate" />{t('ai.undo')}</button>}
+            {signedOut && <button className="btn btn-sm" onClick={copy}><Icon name="copy" />{t('ai.copy')}</button>}
             {!p.run.changes.length && <button className="btn btn-sm" onClick={() => setP({ kind: 'idle' })}>{t('common.close')}</button>}
           </div>
         )}
@@ -113,3 +116,6 @@ export function AiFix({ projectId, f, claude, busy, setBusy, rescan, stillThere,
   );
   return <>{p.kind === 'idle' || p.kind === 'running' ? <div className="ai-actions">{button}</div> : null}{panel}</>;
 }
+
+/** The claude CLI's answer when it has no sign-in (it exits at once, nothing changed). */
+export const signedOutText = (s: string): boolean => /not logged in|please run \/login|invalid api key|authentication/i.test(s);
diff --git a/apps/desktop/tests/ai-signed-out.test.ts b/apps/desktop/tests/ai-signed-out.test.ts
new file mode 100644
index 0000000..af37a3a
--- /dev/null
+++ b/apps/desktop/tests/ai-signed-out.test.ts
@@ -0,0 +1,10 @@
+// The claude CLI without a sign-in exits at once with this result text (seen with a real run): the AI fix panel says
+// "not signed in" and offers the copy instead of a bare failure.
+import { expect, test } from 'bun:test';
+import { signedOutText } from '../src/ui/AiFix';
+
+test('signed-out claude answers are recognised', () => {
+  expect(signedOutText('Not logged in · Please run /login')).toBe(true);
+  expect(signedOutText('Invalid API key · Fix external API key')).toBe(true);
+  expect(signedOutText('Removed NSAllowsArbitraryLoads; no http URLs are loaded.')).toBe(false);
+});