fix(cli): discover resumable sessions from /resume

packages/cli/src/__tests__/pi-tui-runner.test.ts

@@ -3250,6 +3250,66 @@ describe('Maka Pi TUI runner', () => {
     ]);
   });
 
+  test('/resume opens a picker containing only resumable sessions when none is attached', async () => {
+    const terminal = new FakeTerminal();
+    const resumable = fakeSessionSummary('resumable', '/repo');
+    const unavailable = fakeSessionSummary('unavailable', '');
+    const driver = new SlashCommandDriver([resumable, unavailable]);
+    (driver as unknown as { sessionId: string | null }).sessionId = null;
+    const run = runMakaPiTui({
+      title: 'Maka',
+      driver,
+      cwd: '/repo',
+      model: 'm',
+      connectionSlug: 'c',
+      permissionMode: 'bypass',
+      terminal,
+    });
+
+    terminal.input('/resume');
+    terminal.input('\r');
+    await waitFor(() => plainTerminalOutput(terminal.output()).includes('Resume Session Current'));
+    const output = plainTerminalOutput(terminal.output());
+    assert.match(output, /resumabl/);
+    assert.doesNotMatch(output, /unavailable/);
+
+    terminal.input('\r');
+    await waitFor(() => driver.resumeCalls === 1);
+    terminal.input('/exit');
+    terminal.input('\r');
+    await run;
+  });
+
+  test('/session keeps attachable rows when resume discovery fails for another session', async () => {
+    const terminal = new FakeTerminal();
+    const attachable = fakeSessionSummary('attachable', '/repo');
+    const archived = fakeSessionSummary('archived', '/repo');
+    const driver = new SlashCommandDriver([attachable, archived]);
+    driver.getSessionResumeAvailability = async (session) => {
+      if (session.id === archived.id) throw new Error('session archived');
+      return { available: true };
+    };
+    const run = runMakaPiTui({
+      title: 'Maka',
+      driver,
+      cwd: '/repo',
+      model: 'm',
+      connectionSlug: 'c',
+      permissionMode: 'bypass',
+      terminal,
+    });
+
+    terminal.input('/session');
+    terminal.input('\r');
+    await waitFor(() => plainTerminalOutput(terminal.output()).includes('Resume Session Current'));
+    assert.match(plainTerminalOutput(terminal.output()), /attachab/);
+
+    terminal.input('\x1b');
+    terminal.input('/exit');
+    terminal.input('\r');
+    await run;
+  });
+
   test('surfaces a notice when the foreign-session scan fails', async () => {
     const terminal = new FakeTerminal();
     const driver = new SlashCommandDriver([]);

packages/cli/src/__tests__/runtime-host-session-driver.test.ts

@@ -1514,6 +1514,15 @@ class FakeConnection {
         goal: this.goalQueryResults.shift() ?? null,
       } as OperationOutput<K>;
     }
+    if (operation === 'turn.resume.query') {
+      return {
+        sessionId: (input as OperationInput<'turn.resume.query'>).sessionId,
+        disposition: 'ready',
+        sourceRunId: 'source-run-1',
+        sourceTurnId: 'source-turn-1',
+        sourceRuntimeEventHighWater: 1,
+      } as OperationOutput<K>;
+    }
     if (operation === 'session.configuration.update') {
       const update = input as OperationInput<'session.configuration.update'>;
       return {