refactor: decouple webui runtime state via events

tests/agent/test_loop_direct_websocket_status.py

@@ -7,6 +7,7 @@ from nanobot.agent.loop import AgentLoop
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.providers.base import GenerationSettings, LLMResponse
+from nanobot.session.webui_turns import WebuiTurnCoordinator
 
 
 def _make_loop(tmp_path):
@@ -25,6 +26,11 @@ def _make_loop(tmp_path):
         workspace=tmp_path,
         model="test-model",
     )
+    WebuiTurnCoordinator(
+        bus=bus,
+        sessions=loop.sessions,
+        schedule_background=lambda coro: loop._schedule_background(coro),
+    ).subscribe(loop.runtime_events)
     loop.tools.get_definitions = MagicMock(return_value=[])
     return loop
 

tests/agent/test_loop_progress.py

@@ -11,6 +11,7 @@ from nanobot.agent.loop import AgentLoop
 from nanobot.bus.events import InboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.providers.base import LLMResponse, ToolCallRequest
+from nanobot.session.webui_turns import WebuiTurnCoordinator
 from nanobot.utils.progress_events import (
     invoke_file_edit_progress,
     on_progress_accepts_file_edit_events,
@@ -24,6 +25,15 @@ def _make_loop(tmp_path: Path) -> AgentLoop:
     return AgentLoop(bus=bus, provider=provider, workspace=tmp_path, model="test-model")
 
 
+def _attach_webui_runtime_events(loop: AgentLoop, bus: MessageBus) -> None:
+    coordinator = WebuiTurnCoordinator(
+        bus=bus,
+        sessions=loop.sessions,
+        schedule_background=lambda coro: loop._schedule_background(coro),
+    )
+    coordinator.subscribe(loop.runtime_events)
+
+
 class TestToolEventProgress:
     """_run_agent_loop emits structured tool_events via on_progress."""
 
@@ -456,6 +466,7 @@ class TestToolEventProgress:
         provider.chat_stream_with_retry = chat_stream_with_retry
         provider.chat_with_retry = AsyncMock()
         loop = AgentLoop(bus=bus, provider=provider, workspace=tmp_path, model="openai-codex/gpt-5.5")
+        _attach_webui_runtime_events(loop, bus)
         loop.tools.get_definitions = MagicMock(return_value=[])
         loop.consolidator.maybe_consolidate_by_tokens = AsyncMock(return_value=False)  # type: ignore[method-assign]
 
@@ -549,6 +560,7 @@ class TestToolEventProgress:
         provider.get_default_model.return_value = "test-model"
         provider.chat_with_retry = AsyncMock(return_value=LLMResponse(content="Done", tool_calls=[]))
         loop = AgentLoop(bus=bus, provider=provider, workspace=tmp_path, model="test-model")
+        _attach_webui_runtime_events(loop, bus)
         loop.tools.get_definitions = MagicMock(return_value=[])
         loop.consolidator.maybe_consolidate_by_tokens = AsyncMock(return_value=False)  # type: ignore[method-assign]
 
@@ -593,6 +605,7 @@ class TestToolEventProgress:
 
         provider.chat_with_retry = AsyncMock(side_effect=chat_with_retry)
         loop = AgentLoop(bus=bus, provider=provider, workspace=tmp_path, model="test-model")
+        _attach_webui_runtime_events(loop, bus)
         loop.tools.get_definitions = MagicMock(return_value=[])
         loop.consolidator.maybe_consolidate_by_tokens = AsyncMock(return_value=False)  # type: ignore[method-assign]
 
@@ -641,6 +654,7 @@ class TestToolEventProgress:
         provider.get_default_model.return_value = "test-model"
         provider.chat_with_retry = AsyncMock(return_value=LLMResponse(content="Done", tool_calls=[]))
         loop = AgentLoop(bus=bus, provider=provider, workspace=tmp_path, model="test-model")
+        _attach_webui_runtime_events(loop, bus)
         loop.tools.get_definitions = MagicMock(return_value=[])
         loop.consolidator.maybe_consolidate_by_tokens = AsyncMock(return_value=False)  # type: ignore[method-assign]
 
@@ -693,6 +707,7 @@ class TestToolEventProgress:
         provider.get_default_model.return_value = "test-model"
         provider.chat_with_retry = AsyncMock(return_value=LLMResponse(content="Done", tool_calls=[]))
         loop = AgentLoop(bus=bus, provider=provider, workspace=tmp_path, model="test-model")
+        _attach_webui_runtime_events(loop, bus)
 
         async def fake_title_after_turn(**_kwargs: object) -> bool:
             raise AssertionError("command-only turns should not generate titles")

tests/agent/test_loop_save_turn.py

@@ -39,7 +39,13 @@ def _make_full_loop(tmp_path: Path) -> AgentLoop:
     provider = MagicMock()
     provider.get_default_model.return_value = "test-model"
     provider.chat_with_retry = AsyncMock(return_value=LLMResponse(content="Test title"))
-    return AgentLoop(bus=MessageBus(), provider=provider, workspace=tmp_path, model="test-model")
+    loop = AgentLoop(bus=MessageBus(), provider=provider, workspace=tmp_path, model="test-model")
+    WebuiTurnCoordinator(
+        bus=loop.bus,
+        sessions=loop.sessions,
+        schedule_background=lambda coro: loop._schedule_background(coro),
+    ).subscribe(loop.runtime_events)
+    return loop
 
 
 def test_agent_loop_llm_runtime_reflects_current_provider_and_model(tmp_path: Path) -> None:

tests/agent/tools/test_long_task.py

@@ -14,8 +14,10 @@ from nanobot.agent.tools.long_task import (
     LongTaskTool,
 )
 from nanobot.bus.queue import MessageBus
+from nanobot.bus.runtime_events import RuntimeEventBus
 from nanobot.session.goal_state import GOAL_STATE_KEY
 from nanobot.session.manager import SessionManager
+from nanobot.session.webui_turns import WebuiTurnCoordinator
 
 
 def _tools(sm: SessionManager) -> tuple[LongTaskTool, CompleteGoalTool]:
@@ -120,8 +122,14 @@ async def test_goal_tools_context_isolated_across_tool_types(tmp_path):
 async def test_long_task_publishes_goal_state_ws_after_save(tmp_path):
     bus = MagicMock()
     bus.publish_outbound = AsyncMock()
+    runtime_events = RuntimeEventBus()
     sm = SessionManager(tmp_path)
-    lt = LongTaskTool(sessions=sm, bus=bus)
+    WebuiTurnCoordinator(
+        bus=bus,
+        sessions=sm,
+        schedule_background=lambda _coro: None,
+    ).subscribe(runtime_events)
+    lt = LongTaskTool(sessions=sm, runtime_events=runtime_events)
     rc = RequestContext(
         channel="websocket",
         chat_id="chat-99",
@@ -148,9 +156,15 @@ async def test_long_task_publishes_goal_state_ws_after_save(tmp_path):
 async def test_complete_goal_publishes_inactive_goal_state_ws(tmp_path):
     bus = MagicMock()
     bus.publish_outbound = AsyncMock()
+    runtime_events = RuntimeEventBus()
     sm = SessionManager(tmp_path)
-    lt = LongTaskTool(sessions=sm, bus=bus)
-    cg = CompleteGoalTool(sessions=sm, bus=bus)
+    WebuiTurnCoordinator(
+        bus=bus,
+        sessions=sm,
+        schedule_background=lambda _coro: None,
+    ).subscribe(runtime_events)
+    lt = LongTaskTool(sessions=sm, runtime_events=runtime_events)
+    cg = CompleteGoalTool(sessions=sm, runtime_events=runtime_events)
     rc = RequestContext(
         channel="websocket",
         chat_id="chat-z",