feat(acp): add steer and queue slash commands

tests/acp_adapter/test_acp_commands.py

@@ -0,0 +1,112 @@
+from types import SimpleNamespace
+
+import pytest
+from acp.schema import TextContentBlock
+
+from acp_adapter.server import HermesACPAgent
+from acp_adapter.session import SessionManager
+
+
+class FakeAgent:
+    def __init__(self):
+        self.model = "fake-model"
+        self.provider = "fake-provider"
+        self.enabled_toolsets = ["hermes-acp"]
+        self.disabled_toolsets = []
+        self.tools = []
+        self.valid_tool_names = set()
+        self.steers = []
+        self.runs = []
+
+    def steer(self, text):
+        self.steers.append(text)
+        return True
+
+    def run_conversation(self, *, user_message, conversation_history, task_id, **kwargs):
+        self.runs.append(user_message)
+        messages = list(conversation_history or [])
+        messages.append({"role": "user", "content": user_message})
+        final = f"ran: {user_message}"
+        messages.append({"role": "assistant", "content": final})
+        return {"final_response": final, "messages": messages}
+
+
+class CaptureConn:
+    def __init__(self):
+        self.updates = []
+
+    async def session_update(self, *args, **kwargs):
+        if kwargs:
+            self.updates.append((kwargs.get("session_id"), kwargs.get("update")))
+        else:
+            self.updates.append((args[0], args[1]))
+
+    async def request_permission(self, *args, **kwargs):
+        return SimpleNamespace(outcome="allow")
+
+
+class NoopDb:
+    def get_session(self, *_args, **_kwargs):
+        return None
+
+    def create_session(self, *_args, **_kwargs):
+        return None
+
+    def update_session(self, *_args, **_kwargs):
+        return None
+
+
+def make_agent_and_state():
+    fake = FakeAgent()
+    manager = SessionManager(agent_factory=lambda **kwargs: fake, db=NoopDb())
+    acp_agent = HermesACPAgent(session_manager=manager)
+    state = manager.create_session(cwd=".")
+    conn = CaptureConn()
+    acp_agent.on_connect(conn)
+    return acp_agent, state, fake, conn
+
+
+@pytest.mark.asyncio
+async def test_acp_steer_slash_command_injects_into_running_agent():
+    acp_agent, state, fake, _conn = make_agent_and_state()
+    state.is_running = True
+
+    response = await acp_agent.prompt(
+        session_id=state.session_id,
+        prompt=[TextContentBlock(type="text", text="/steer prefer the simpler fix")],
+    )
+
+    assert response.stop_reason == "end_turn"
+    assert fake.steers == ["prefer the simpler fix"]
+    assert fake.runs == []
+
+
+@pytest.mark.asyncio
+async def test_acp_queue_slash_command_adds_next_turn_without_running_now():
+    acp_agent, state, fake, _conn = make_agent_and_state()
+
+    response = await acp_agent.prompt(
+        session_id=state.session_id,
+        prompt=[TextContentBlock(type="text", text="/queue run the tests after this")],
+    )
+
+    assert response.stop_reason == "end_turn"
+    assert state.queued_prompts == ["run the tests after this"]
+    assert fake.runs == []
+
+
+@pytest.mark.asyncio
+async def test_acp_prompt_drains_queued_turns_after_current_run():
+    acp_agent, state, fake, conn = make_agent_and_state()
+    state.queued_prompts.append("then run tests")
+
+    response = await acp_agent.prompt(
+        session_id=state.session_id,
+        prompt=[TextContentBlock(type="text", text="make the change")],
+    )
+
+    assert response.stop_reason == "end_turn"
+    assert fake.runs == ["make the change", "then run tests"]
+    assert state.queued_prompts == []
+    agent_messages = [u for _sid, u in conn.updates if getattr(u, "session_update", None) == "agent_message_chunk"]
+    assert len(agent_messages) >= 2