feat: add shell-native message routing

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

tests/test_cli.py

@@ -13,6 +13,16 @@ def test_help_and_version(capsys):
     assert "usage:" in capsys.readouterr().out
 
 
+def test_root_help_exposes_repository_shorthand_and_command(capsys):
+    with pytest.raises(SystemExit) as exc:
+        main(["--help"])
+    assert exc.value.code == 0
+    output = capsys.readouterr().out
+    assert "tamq [--detach] [--command COMMAND] REPO [REPO ...]" in output
+    assert "With no --command" in output
+    assert "@TARGET: MESSAGE" in output
+
+
 def test_attach_delegates_to_tmux(monkeypatch):
     calls = []
     monkeypatch.delenv("TMUX", raising=False)