Fix the dashboard crash on sessions with no folder

CHANGELOG.md

@@ -57,6 +57,12 @@ The version is carried in `pyproject.toml` and `src/assistant/__init__.py`
   and reminders to finish older pending work before starting another task.
 
 ### Fixed
+- Stop the dashboard from crashing on sessions with no working folder. cmux
+  0.65 lists a `restore_record` before the `resume_binding`, so
+  `world-scanner.py` read the folder from a record that names it
+  `working_directory` and saved no folder for those sessions. The renderer then
+  failed on every run. The scanner now reads either name, and the open-sessions
+  list shows a session even when its folder is unknown.
 - Stop two time-of-day test failures. The Observer audit tests failed in the
   last minute of a two-hour window, and five Strategist tests that count calls
   per UTC day failed in the last minutes of the day. Each test now starts its clock at the

bin/render-assistant-page.py

@@ -312,7 +312,7 @@ def render_live_sessions(world):
         sessions.append({
             "ws_ref": sess.get("ws_ref"),
             "ws_title": sess.get("ws_title", ""),
-            "cwd": sess.get("cwd", ""),
+            "cwd": sess.get("cwd") or "",
             "role": role, "ts": ts, "text": text or "",
             "age_sec": age_sec,
             "user_unanswered": sess.get("user_unanswered"),

bin/world-scanner.py

@@ -257,7 +257,9 @@ def surface_resume_binding(surface_ref, ws_ref):
     return {
         "session_id": str(sid),
         "provider": "droid" if kind in {"factory", "droid"} else "claude",
-        "cwd": binding.get("cwd"),
+        # cmux 0.65 lists a restore_record, which names it working_directory,
+        # before the resume_binding.
+        "cwd": binding.get("cwd") or binding.get("working_directory"),
     }
 
 

tests/test_renderer_tabs.py

@@ -350,6 +350,16 @@ def test_quiet_pill_for_very_old_session(self):
         self.assertEqual(n, 1)
         self.assertIn(">quiet<", html)
 
+    def test_session_with_unknown_cwd_renders(self):
+        now = datetime.now(timezone.utc)
+        world = {"live_sessions": [
+            {"ws_ref": "workspace:13", "cwd": None, "is_cron": False,
+             "last_assistant": {"ts": _iso(now - timedelta(seconds=30)), "text": "no folder"}},
+        ]}
+        html, n = self.mod.render_live_sessions(world)
+        self.assertEqual(n, 1)
+        self.assertIn('<span class="pill scope" title="">workspace:13</span>', html)
+
     def test_errored_session_hidden(self):
         now = datetime.now(timezone.utc)
         world = {"live_sessions": [

tests/test_world_scanner.py

@@ -467,6 +467,28 @@ def test_build_identity_keeps_same_cwd_sessions_separate(ws, monkeypatch):
         assert session["last_user"]["text"] == f"Context for {expected['session_id']}"
 
 
+def test_build_reads_cwd_from_the_cmux_065_restore_record(ws, monkeypatch):
+    records, _, _, _ = _seed_identity_world(ws, monkeypatch, ("claude",))
+    sid = records[0]["session_id"]
+    original_run = ws.subprocess.run
+
+    def run(args, **kwargs):
+        if args[1:4] != ["surface", "resume", "show"]:
+            return original_run(args, **kwargs)
+        # cmux 0.65 order: the restore_record comes before the resume_binding.
+        return fake_completed(json.dumps({
+            "cleared": False, "pane_ref": "pane:1",
+            "restore_record": {"checkpoint_id": sid, "kind": "claude",
+                               "working_directory": "/work/repo"},
+            "resume_binding": {"checkpoint_id": sid, "kind": "claude", "cwd": "/work/repo"},
+        }))
+
+    monkeypatch.setattr(ws.subprocess, "run", run)
+    ws.build()
+    world = json.loads(ws.OUT_PATH.read_text())
+    assert [s["cwd"] for s in world["live_sessions"]] == ["/work/repo"]
+
+
 @pytest.mark.parametrize("kind", ["claude", "droid"])
 @pytest.mark.parametrize("process_state", ["unrelated", "background", "ambiguous", "mixed"])
 def test_native_binding_requires_verified_provider_process(ws, monkeypatch, kind, process_state):