feat: display messages as terminal output

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a03397-4d51-7fd1-8ff2-946eb22ea2bc

tests/test_service_delivery.py

@@ -19,6 +19,9 @@ class FakeControl:
     def inject(self, window, text):
         self.injected.append((window, text))
 
+    def pane_tty(self, window):
+        return f"/dev/pts/{window.rsplit(':', 1)[-1]}"
+
     def close(self):
         return None
 
@@ -46,6 +49,58 @@ def test_service_never_injects_manual_endpoint_messages(tmp_path, monkeypatch):
     assert store.list()[0]["state"] == "pending"
 
 
+def test_service_writes_output_once_and_retains_pending_ack(tmp_path, monkeypatch):
+    store = Store(tmp_path / "queue.sqlite3")
+    store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"], "output")
+    message_id = store.add("repo-a", "repo-b", "continue")
+    writes = []
+    monkeypatch.setattr("tamq.service.ControlModeClient", FakeControl)
+    monkeypatch.setattr(
+        "tamq.service.write_terminal_output",
+        lambda path, text: writes.append((path, text)),
+    )
+    service = Service(store=store)
+
+    service._deliver_once()
+    service._deliver_once()
+
+    assert writes == [
+        (
+            "/dev/pts/repo-b",
+            f"\r\n#repo-a: continue [{message_id}]\r\n",
+        )
+    ]
+    row = store.list()[0]
+    assert row["state"] == "pending"
+    assert row["displayed_at"] is not None
+    assert store.db.execute("SELECT COUNT(*) FROM leases").fetchone()[0] == 0
+
+
+def test_failed_terminal_output_remains_undisplayed_and_retryable(tmp_path, monkeypatch):
+    store = Store(tmp_path / "queue.sqlite3")
+    store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"], "output")
+    store.add("repo-a", "repo-b", "continue")
+    attempts = []
+    monkeypatch.setattr("tamq.service.ControlModeClient", FakeControl)
+
+    def fail_once(path, text):
+        attempts.append((path, text))
+        if len(attempts) == 1:
+            raise OSError("temporary failure")
+
+    monkeypatch.setattr("tamq.service.write_terminal_output", fail_once)
+    service = Service(store=store)
+
+    service._deliver_once()
+    assert store.list()[0]["displayed_at"] is None
+    store.db.execute("UPDATE leases SET expires_at=0")
+    store.db.commit()
+    service._deliver_once()
+
+    assert len(attempts) == 2
+    assert store.list()[0]["displayed_at"] is not None
+
+
 def test_service_disconnects_disappeared_tmux_endpoint(tmp_path, monkeypatch):
     store = Store(tmp_path / "queue.sqlite3")
     store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"])