Separate input from enter submission in Slack bridge

tests/test_bridge.py

@@ -46,6 +46,7 @@ class FakePtyManager:
         self.cli_name = cli_name
         self._alive = False
         self.sent_inputs: list[str] = []
+        self.enter_count = 0
         FakePtyManager.instances.append(self)
 
     @property
@@ -61,6 +62,9 @@ class FakePtyManager:
     def send(self, text: str) -> None:
         self.sent_inputs.append(text)
 
+    def send_enter(self) -> None:
+        self.enter_count += 1
+
     def read_output(self, timeout: float = 5) -> str:
         return ""
 
@@ -143,6 +147,19 @@ def test_handle_message_resets_last_sent_output_after_input(monkeypatch) -> None
     assert bridge._last_sent_fingerprint is None
 
 
+def test_handle_message_enter_command_sends_enter_only(monkeypatch) -> None:
+    FakePtyManager.instances.clear()
+    bridge = _make_bridge(monkeypatch)
+
+    bridge._handle_command("start", "codex", "C1")
+    pty = FakePtyManager.instances[-1]
+
+    bridge._handle_message("!enter", "C1")
+
+    assert pty.sent_inputs == []
+    assert pty.enter_count == 1
+
+
 def test_split_message_preserves_all_content(monkeypatch) -> None:
     bridge = _make_bridge(monkeypatch)
     chunks = bridge._split_message("line1\nline2\nline3", max_length=7)