feat(spawn): allow per-subagent sampling temperature (#3969)

tests/agent/tools/test_subagent_tools.py

@@ -94,6 +94,39 @@ async def test_subagent_uses_configured_max_iterations(tmp_path):
     mgr.runner.run.assert_awaited_once()
 
 
+@pytest.mark.asyncio
+async def test_spawn_forwards_temperature_to_run_spec(tmp_path):
+    """A temperature passed to spawn() should reach the AgentRunSpec."""
+    from nanobot.agent.subagent import SubagentManager
+    from nanobot.bus.queue import MessageBus
+
+    bus = MessageBus()
+    provider = MagicMock()
+    provider.get_default_model.return_value = "test-model"
+    mgr = SubagentManager(
+        provider=provider,
+        workspace=tmp_path,
+        bus=bus,
+        max_tool_result_chars=_MAX_TOOL_RESULT_CHARS,
+    )
+    mgr._announce_result = AsyncMock()
+
+    seen = {}
+
+    async def fake_run(spec):
+        seen["temperature"] = spec.temperature
+        return SimpleNamespace(
+            stop_reason="done", final_content="done", error=None, tool_events=[],
+        )
+
+    mgr.runner.run = AsyncMock(side_effect=fake_run)
+
+    await mgr.spawn(task="do task", temperature=0.9)
+    await asyncio.gather(*mgr._running_tasks.values(), return_exceptions=True)
+
+    assert seen["temperature"] == 0.9
+
+
 @pytest.mark.asyncio
 async def test_spawn_tool_rejects_when_at_concurrency_limit(tmp_path):
     """SpawnTool should return an error string when the concurrency limit is reached."""

tests/test_tool_contextvars.py

@@ -64,6 +64,7 @@ async def test_spawn_tool_keeps_task_local_context() -> None:
             origin_chat_id: str,
             session_key: str,
             origin_message_id: str | None = None,
+            temperature: float | None = None,
         ) -> str:
             seen.append((origin_channel, origin_chat_id, session_key))
             return f"{origin_channel}:{origin_chat_id}:{task}"
@@ -176,6 +177,7 @@ async def test_spawn_tool_basic_set_context_and_execute() -> None:
             origin_chat_id,
             session_key,
             origin_message_id=None,
+            temperature=None,
         ):
             seen.append((origin_channel, origin_chat_id, session_key))
             return f"ok: {task}"
@@ -208,6 +210,7 @@ async def test_spawn_tool_default_values_without_set_context() -> None:
             origin_chat_id,
             session_key,
             origin_message_id=None,
+            temperature=None,
         ):
             seen.append((origin_channel, origin_chat_id, session_key))
             return "ok"