feat: add conversational replies and stable output

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

tests/test_tmux_manager.py

@@ -155,6 +155,7 @@ def test_neutral_plan_starts_shell_without_sending_keystrokes(tmp_path, monkeypa
     assert (command_dir / "@a:").is_file()
     assert (command_dir / "@b").is_file()
     assert (command_dir / "@b:").is_file()
+    assert (command_dir / "@").is_file()
 
 
 def test_address_commands_preserve_message_arguments(tmp_path):
@@ -173,6 +174,14 @@ def test_address_commands_preserve_message_arguments(tmp_path):
         )
         assert result.stdout == "send -- @audit-core: Some message! $value ; literal --from\n"
 
+    result = subprocess.run(
+        [str(command_dir / "@"), "Some reply!", "$value", "--literal"],
+        text=True,
+        capture_output=True,
+        check=True,
+    )
+    assert result.stdout == "reply -- Some reply! $value --literal\n"
+
 
 def test_address_commands_reject_unsafe_repository_names(tmp_path):
     manager = tmux.TmuxManager("tamq-test", command_dir=tmp_path / "commands")
@@ -192,6 +201,18 @@ def test_address_commands_do_not_replace_unowned_commands(tmp_path):
     assert existing.read_text(encoding="utf-8") == "#!/bin/sh\necho mine\n"
 
 
+def test_address_commands_do_not_replace_unowned_bare_reply(tmp_path):
+    command_dir = tmp_path / "commands"
+    command_dir.mkdir()
+    existing = command_dir / "@"
+    existing.write_text("#!/bin/sh\necho mine\n", encoding="utf-8")
+    manager = tmux.TmuxManager("tamq-test", command_dir=command_dir)
+
+    with pytest.raises(tmux.TmuxError, match="refusing to replace"):
+        manager._install_address_commands(["audit-core"])
+    assert existing.read_text(encoding="utf-8") == "#!/bin/sh\necho mine\n"
+
+
 def test_preflight_rejects_missing_agent(tmp_path, monkeypatch):
     repo = tmp_path / "a"
     repo.mkdir()