"""Agent loop: the core processing engine.""" from __future__ import annotations import asyncio import dataclasses import os import time from contextlib import AsyncExitStack, nullcontext, suppress from dataclasses import dataclass, field from enum import Enum, auto from pathlib import Path from typing import TYPE_CHECKING, Any, Awaitable, Callable from loguru import logger from nanobot.agent import context as agent_context from nanobot.agent import model_presets as preset_helpers from nanobot.agent.autocompact import AutoCompact from nanobot.agent.context import ContextBuilder from nanobot.agent.hook import AgentHook, CompositeHook from nanobot.agent.memory import Consolidator, Dream from nanobot.agent.progress_hook import AgentProgressHook from nanobot.agent.runner import _MAX_INJECTIONS_PER_TURN, AgentRunner, AgentRunSpec from nanobot.agent.subagent import SubagentManager from nanobot.agent.tools.context import RequestContext, bind_request_context, reset_request_context from nanobot.agent.tools.file_state import FileStateStore, bind_file_states, reset_file_states from nanobot.agent.tools.message import MessageTool from nanobot.agent.tools.registry import ToolRegistry from nanobot.agent.tools.self import MyTool from nanobot.bus.events import InboundMessage, OutboundMessage from nanobot.bus.progress import build_bus_progress_callback from nanobot.bus.queue import MessageBus from nanobot.bus.runtime_events import ( RuntimeEventBus, RuntimeEventPublisher, ensure_runtime_event_publisher, ) from nanobot.command import CommandContext, CommandRouter, register_builtin_commands from nanobot.config.schema import AgentDefaults, ModelPresetConfig from nanobot.providers.base import LLMProvider from nanobot.providers.factory import ProviderSnapshot from nanobot.security.workspace_access import ( WorkspaceScopeResolver, bind_workspace_scope, reset_workspace_scope, ) from nanobot.session.goal_state import ( goal_state_runtime_lines, runner_wall_llm_timeout_s, sustained_goal_active, ) from nanobot.session.manager import Session, SessionManager from nanobot.session import turn_continuation from nanobot.utils.document import extract_documents, reference_non_image_attachments from nanobot.utils.helpers import image_placeholder_text from nanobot.utils.helpers import truncate_text as truncate_text_fn from nanobot.utils.image_generation_intent import image_generation_prompt from nanobot.utils.llm_runtime import LLMRuntime from nanobot.utils.runtime import ( EMPTY_FINAL_RESPONSE_MESSAGE, SUSTAINED_GOAL_CONTINUE_PROMPT, ) if TYPE_CHECKING: from nanobot.config.schema import ( ChannelsConfig, ProviderConfig, ToolsConfig, ) from nanobot.cron.service import CronService UNIFIED_SESSION_KEY = "unified:default" class TurnState(Enum): RESTORE = auto() COMPACT = auto() COMMAND = auto() BUILD = auto() RUN = auto() SAVE = auto() RESPOND = auto() DONE = auto() @dataclass class StateTraceEntry: state: TurnState started_at: float duration_ms: float event: str error: str | None = None @dataclass class TurnContext: msg: InboundMessage session_key: str state: TurnState turn_id: str session: Session | None = None history: list[dict[str, Any]] = field(default_factory=list) initial_messages: list[dict[str, Any]] = field(default_factory=list) final_content: str | None = None tools_used: list[str] = field(default_factory=list) all_messages: list[dict[str, Any]] = field(default_factory=list) stop_reason: str = "" had_injections: bool = False user_persisted_early: bool = False save_skip: int = 0 outbound: OutboundMessage | None = None suppress_response: bool = False on_progress: Callable[..., Awaitable[None]] | None = None on_stream: Callable[[str], Awaitable[None]] | None = None on_stream_end: Callable[..., Awaitable[None]] | None = None on_retry_wait: Callable[[str], Awaitable[None]] | None = None pending_queue: asyncio.Queue | None = None pending_summary: str | None = None turn_wall_started_at: float = field(default_factory=time.time) visible_run_started_at: float | None = None turn_latency_ms: int | None = None trace: list[StateTraceEntry] = field(default_factory=list) class AgentLoop: """ The agent loop is the core processing engine. It: 1. Receives messages from the bus 2. Builds context with history, memory, skills 3. Calls the LLM 4. Executes tool calls 5. Sends responses back """ @property def current_iteration(self) -> int: return self._current_iteration @property def tool_names(self) -> list[str]: return self.tools.tool_names def llm_runtime(self) -> LLMRuntime: """Return the current provider/model pair owned by this loop.""" self._refresh_provider_snapshot() return LLMRuntime(self.provider, self.model) _RUNTIME_CHECKPOINT_KEY = "runtime_checkpoint" _PENDING_USER_TURN_KEY = "pending_user_turn" # Event-driven state transition table. # Handlers return an event string; the driver looks up the next state here. _TRANSITIONS: dict[tuple[TurnState, str], TurnState] = { (TurnState.RESTORE, "ok"): TurnState.COMPACT, (TurnState.COMPACT, "ok"): TurnState.COMMAND, (TurnState.COMMAND, "dispatch"): TurnState.BUILD, (TurnState.COMMAND, "shortcut"): TurnState.DONE, (TurnState.BUILD, "ok"): TurnState.RUN, (TurnState.RUN, "ok"): TurnState.SAVE, (TurnState.SAVE, "ok"): TurnState.RESPOND, (TurnState.RESPOND, "ok"): TurnState.DONE, } def __init__( self, bus: MessageBus, provider: LLMProvider, workspace: Path, model: str | None = None, max_iterations: int | None = None, max_concurrent_subagents: int | None = None, context_window_tokens: int | None = None, context_block_limit: int | None = None, max_tool_result_chars: int | None = None, provider_retry_mode: str = "standard", tool_hint_max_length: int | None = None, cron_service: CronService | None = None, restrict_to_workspace: bool = False, session_manager: SessionManager | None = None, mcp_servers: dict | None = None, channels_config: ChannelsConfig | None = None, timezone: str | None = None, session_ttl_minutes: int = 0, consolidation_ratio: float = 0.5, max_messages: int = 120, hooks: list[AgentHook] | None = None, unified_session: bool = False, disabled_skills: list[str] | None = None, tools_config: ToolsConfig | None = None, image_generation_provider_config: ProviderConfig | None = None, image_generation_provider_configs: dict[str, ProviderConfig] | None = None, provider_snapshot_loader: Callable[..., ProviderSnapshot] | None = None, provider_signature: tuple[object, ...] | None = None, model_presets: dict[str, ModelPresetConfig] | None = None, model_preset: str | None = None, preset_snapshot_loader: preset_helpers.PresetSnapshotLoader | None = None, runtime_events: RuntimeEventBus | None = None, runtime_model_publisher: Callable[[str, str | None], None] | None = None, ): from nanobot.config.schema import ToolsConfig _tc = tools_config or ToolsConfig() defaults = AgentDefaults() self.bus = bus self.runtime_events = runtime_events or RuntimeEventBus() self.runtime_event_publisher = RuntimeEventPublisher(self.runtime_events) self.channels_config = channels_config self.provider = provider self._provider_snapshot_loader = provider_snapshot_loader self._preset_snapshot_loader = preset_snapshot_loader self._runtime_model_publisher = runtime_model_publisher self._provider_signature = provider_signature self._default_selection_signature = preset_helpers.default_selection_signature(provider_signature) self.workspace = workspace self.model = model or provider.get_default_model() self.max_iterations = ( max_iterations if max_iterations is not None else defaults.max_tool_iterations ) self.context_window_tokens = ( context_window_tokens if context_window_tokens is not None else defaults.context_window_tokens ) self.context_block_limit = context_block_limit self.max_tool_result_chars = ( max_tool_result_chars if max_tool_result_chars is not None else defaults.max_tool_result_chars ) self.provider_retry_mode = provider_retry_mode self.tool_hint_max_length = ( tool_hint_max_length if tool_hint_max_length is not None else defaults.tool_hint_max_length ) self.tools_config = _tc self.web_config = _tc.web self.exec_config = _tc.exec self._image_generation_provider_configs = dict(image_generation_provider_configs or {}) if ( image_generation_provider_config is not None and "openrouter" not in self._image_generation_provider_configs ): self._image_generation_provider_configs["openrouter"] = image_generation_provider_config self.cron_service = cron_service self.restrict_to_workspace = restrict_to_workspace self.workspace_scopes = WorkspaceScopeResolver( default_workspace=workspace, default_restrict_to_workspace=restrict_to_workspace, ) self._start_time = time.time() self._last_usage: dict[str, int] = {} self._extra_hooks: list[AgentHook] = hooks or [] self.context = ContextBuilder(workspace, timezone=timezone, disabled_skills=disabled_skills) self.sessions = session_manager or SessionManager(workspace) self.tools = ToolRegistry() # One file-read/write tracker per logical session. The tool registry is # shared by this loop, so tools resolve the active state via contextvars. self._file_state_store = FileStateStore() self.runner = AgentRunner(provider) self.subagents = SubagentManager( provider=provider, workspace=workspace, bus=bus, model=self.model, tools_config=_tc, max_tool_result_chars=self.max_tool_result_chars, restrict_to_workspace=restrict_to_workspace, disabled_skills=disabled_skills, max_iterations=self.max_iterations, max_concurrent_subagents=max_concurrent_subagents, llm_wall_timeout_for_session=lambda sk: runner_wall_llm_timeout_s(self.sessions, sk), ) self._unified_session = unified_session self._max_messages = max_messages if max_messages > 0 else 120 self._running = False self._mcp_servers = mcp_servers or {} self._mcp_stacks: dict[str, AsyncExitStack] = {} self._mcp_connected = False self._mcp_connecting = False self._active_tasks: dict[str, list[asyncio.Task]] = {} # session_key -> tasks self._background_tasks: list[asyncio.Task] = [] self._session_locks: dict[str, asyncio.Lock] = {} # Per-session pending queues for mid-turn message injection. # When a session has an active task, new messages for that session # are routed here instead of creating a new task. self._pending_queues: dict[str, asyncio.Queue] = {} # NANOBOT_MAX_CONCURRENT_REQUESTS: <=0 means unlimited; default 3. _max = int(os.environ.get("NANOBOT_MAX_CONCURRENT_REQUESTS", "3")) self._concurrency_gate: asyncio.Semaphore | None = ( asyncio.Semaphore(_max) if _max > 0 else None ) self.consolidator = Consolidator( store=self.context.memory, provider=provider, model=self.model, sessions=self.sessions, context_window_tokens=self.context_window_tokens, build_messages=self.context.build_messages, get_tool_definitions=self.tools.get_definitions, max_completion_tokens=provider.generation.max_tokens, consolidation_ratio=consolidation_ratio, ) self.auto_compact = AutoCompact( sessions=self.sessions, consolidator=self.consolidator, session_ttl_minutes=session_ttl_minutes, ) self.dream = Dream( store=self.context.memory, provider=provider, model=self.model, ) self.model_presets: dict[str, ModelPresetConfig] = model_presets or {} self._active_preset: str | None = None if model_preset: self.set_model_preset(model_preset, publish_update=False) self._register_default_tools() self._runtime_vars: dict[str, Any] = {} self._current_iteration: int = 0 self.commands = CommandRouter() register_builtin_commands(self.commands) @classmethod def from_config( cls, config: Any, bus: MessageBus | None = None, **extra: Any, ) -> AgentLoop: """Create an AgentLoop from config with the common parameter set. Extra keyword arguments are forwarded to ``AgentLoop.__init__``, allowing callers to override or extend the standard config-derived parameters (e.g. ``cron_service``, ``session_manager``). """ from nanobot.providers.factory import make_provider if bus is None: bus = MessageBus() defaults = config.agents.defaults provider = extra.pop("provider", None) or make_provider(config) resolved = config.resolve_preset() model = extra.pop("model", None) or resolved.model context_window_tokens = extra.pop("context_window_tokens", None) or resolved.context_window_tokens provider_snapshot_loader = extra.pop("provider_snapshot_loader", None) preset_snapshot_loader = extra.pop("preset_snapshot_loader", None) or preset_helpers.make_preset_snapshot_loader( config, provider_snapshot_loader, ) return cls( bus=bus, provider=provider, workspace=config.workspace_path, model=model, max_iterations=defaults.max_tool_iterations, max_concurrent_subagents=defaults.max_concurrent_subagents, context_window_tokens=context_window_tokens, context_block_limit=defaults.context_block_limit, max_tool_result_chars=defaults.max_tool_result_chars, provider_retry_mode=defaults.provider_retry_mode, tool_hint_max_length=defaults.tool_hint_max_length, restrict_to_workspace=config.tools.restrict_to_workspace, mcp_servers=config.tools.mcp_servers, channels_config=config.channels, timezone=defaults.timezone, unified_session=defaults.unified_session, disabled_skills=defaults.disabled_skills, session_ttl_minutes=defaults.session_ttl_minutes, consolidation_ratio=defaults.consolidation_ratio, max_messages=defaults.max_messages, tools_config=config.tools, model_presets=preset_helpers.configured_model_presets(config), model_preset=defaults.model_preset, provider_snapshot_loader=provider_snapshot_loader, preset_snapshot_loader=preset_snapshot_loader, **extra, ) def _sync_subagent_runtime_limits(self) -> None: """Keep subagent runtime limits aligned with mutable loop settings.""" self.subagents.max_iterations = self.max_iterations def _apply_provider_snapshot( self, snapshot: ProviderSnapshot, *, publish_update: bool = True, model_preset: str | None = None, ) -> None: """Swap model/provider for future turns without disturbing an active one.""" provider = snapshot.provider model = snapshot.model context_window_tokens = snapshot.context_window_tokens old_model = self.model self.provider = provider self.model = model self.context_window_tokens = context_window_tokens self.runner.provider = provider self.subagents.set_provider(provider, model) self.consolidator.set_provider(provider, model, context_window_tokens) self.dream.set_provider(provider, model) self._provider_signature = snapshot.signature if publish_update and self._runtime_model_publisher is not None: self._runtime_model_publisher( self.model, model_preset if model_preset is not None else self.model_preset, ) if publish_update: self._runtime_events().runtime_model_changed( self.model, model_preset if model_preset is not None else self.model_preset, ) logger.info("Runtime model switched for next turn: {} -> {}", old_model, model) def _refresh_provider_snapshot(self) -> None: if self._provider_snapshot_loader is None: return try: snapshot = self._provider_snapshot_loader() except Exception: logger.exception("Failed to refresh provider config") return default_selection = preset_helpers.default_selection_signature(snapshot.signature) if self._active_preset and self._default_selection_signature in (None, default_selection): self._default_selection_signature = default_selection try: snapshot = self._build_model_preset_snapshot(self._active_preset) except Exception: logger.exception("Failed to refresh active model preset") return else: self._active_preset = None self._default_selection_signature = default_selection if snapshot.signature == self._provider_signature: return self._default_selection_signature = preset_helpers.default_selection_signature(snapshot.signature) self._apply_provider_snapshot(snapshot) @property def model_preset(self) -> str | None: return self._active_preset @model_preset.setter def model_preset(self, name: str | None) -> None: self.set_model_preset(name) def _build_model_preset_snapshot(self, name: str) -> ProviderSnapshot: return preset_helpers.build_runtime_preset_snapshot( name=name, presets=self.model_presets, provider=self.provider, loader=self._preset_snapshot_loader, ) def set_model_preset(self, name: str | None, *, publish_update: bool = True) -> None: """Resolve a preset by name and apply all runtime model dependents.""" name = preset_helpers.normalize_preset_name(name, self.model_presets) snapshot = self._build_model_preset_snapshot(name) self._apply_provider_snapshot(snapshot, publish_update=publish_update, model_preset=name) self._active_preset = name def _register_default_tools(self) -> None: """Register the default set of tools via plugin loader.""" from nanobot.agent.tools.context import ToolContext from nanobot.agent.tools.loader import ToolLoader ctx = ToolContext( config=self.tools_config, workspace=str(self.workspace), bus=self.bus, subagent_manager=self.subagents, cron_service=self.cron_service, sessions=self.sessions, provider_snapshot_loader=self._provider_snapshot_loader, image_generation_provider_configs=self._image_generation_provider_configs, timezone=self.context.timezone or "UTC", workspace_sandbox=self.workspace_scopes.sandbox_status, runtime_events=self.runtime_events, ) loader = ToolLoader() registered = loader.load(ctx, self.tools) # MyTool needs runtime state reference — manual registration if self.tools_config.my.enable: self.tools.register( MyTool(runtime_state=self, modify_allowed=self.tools_config.my.allow_set) ) registered.append("my") logger.info("Registered {} tools: {}", len(registered), registered) async def _connect_mcp(self) -> None: """Connect configured MCP servers.""" await agent_context.connect_mcp(self, self.tools) def _set_tool_context( self, channel: str, chat_id: str, message_id: str | None = None, metadata: dict | None = None, session_key: str | None = None, ) -> None: """Update context for all tools that need routing info.""" from nanobot.agent.tools.context import ContextAware if session_key is not None: effective_key = session_key elif self._unified_session: effective_key = UNIFIED_SESSION_KEY else: effective_key = f"{channel}:{chat_id}" request_ctx = RequestContext( channel=channel, chat_id=chat_id, message_id=message_id, session_key=effective_key, metadata=dict(metadata or {}), ) for name in self.tools.tool_names: tool = self.tools.get(name) if tool and isinstance(tool, ContextAware): tool.set_context(request_ctx) @staticmethod def _runtime_chat_id(msg: InboundMessage) -> str: """Return the chat id shown in runtime metadata for the model.""" return str(msg.metadata.get("context_chat_id") or msg.chat_id) async def _build_bus_progress_callback( self, msg: InboundMessage ) -> Callable[..., Awaitable[None]]: """Build a progress callback that publishes to the message bus.""" return build_bus_progress_callback(self.bus, msg) async def _build_retry_wait_callback( self, msg: InboundMessage ) -> Callable[[str], Awaitable[None]]: """Build a retry-wait callback that publishes to the message bus.""" async def _on_retry_wait(content: str) -> None: meta = dict(msg.metadata or {}) meta["_retry_wait"] = True await self.bus.publish_outbound( OutboundMessage( channel=msg.channel, chat_id=msg.chat_id, content=content, metadata=meta, ) ) return _on_retry_wait def _runtime_events(self) -> RuntimeEventPublisher: return ensure_runtime_event_publisher(self) def _persist_user_message_early( self, msg: InboundMessage, session: Session, **kwargs: Any, ) -> bool: """Persist the triggering user message before the turn starts. Returns True if the message was persisted. """ if not turn_continuation.should_persist_user_message(msg.metadata): return False media_paths = [p for p in (msg.media or []) if isinstance(p, str) and p] has_text = isinstance(msg.content, str) and msg.content.strip() if has_text or media_paths: extra: dict[str, Any] = ({"media": list(media_paths)} if media_paths else {}) | agent_context.session_extra(msg.metadata) extra.update(kwargs) text = msg.content if isinstance(msg.content, str) else "" session.add_message("user", text, **extra) self._mark_pending_user_turn(session) self.sessions.save(session) return True return False def _build_initial_messages( self, msg: InboundMessage, session: Session, history: list[dict[str, Any]], pending_summary: str | None, ) -> list[dict[str, Any]]: """Build the initial message list for the LLM turn.""" scope = self.workspace_scopes.for_message(msg, session.metadata) return self.context.build_messages( history=history, current_message=image_generation_prompt(msg.content, msg.metadata), media=msg.media if msg.media else None, channel=msg.channel, chat_id=self._runtime_chat_id(msg), sender_id=msg.sender_id, session_summary=pending_summary, session_metadata=session.metadata, workspace=scope.project_path, runtime_state=self, inbound_message=msg, ) async def _dispatch_command_inline( self, msg: InboundMessage, key: str, raw: str, dispatch_fn: Callable[[CommandContext], Awaitable[OutboundMessage | None]], ) -> None: """Dispatch a command directly from the run() loop and publish the result.""" ctx = CommandContext(msg=msg, session=None, key=key, raw=raw, loop=self) result = await dispatch_fn(ctx) if result: await self.bus.publish_outbound(result) else: logger.warning("Command '{}' matched but dispatch returned None", raw) async def _cancel_active_tasks(self, key: str) -> int: """Cancel and await all active tasks and subagents for *key*. Returns the total number of cancelled tasks + subagents. """ tasks = self._active_tasks.pop(key, []) cancelled = sum(1 for t in tasks if not t.done() and t.cancel()) for t in tasks: with suppress(asyncio.CancelledError, Exception): await t sub_cancelled = await self.subagents.cancel_by_session(key) return cancelled + sub_cancelled def _effective_session_key(self, msg: InboundMessage) -> str: """Return the session key used for task routing and mid-turn injections.""" if self._unified_session and not msg.session_key_override: return UNIFIED_SESSION_KEY return msg.session_key def _replay_token_budget(self) -> int: """Derive a token budget for session history replay from the context window.""" if self.context_window_tokens <= 0: return 0 max_output = getattr(getattr(self.provider, "generation", None), "max_tokens", 4096) try: reserved_output = int(max_output) except (TypeError, ValueError): reserved_output = 4096 budget = self.context_window_tokens - max(1, reserved_output) - 1024 return budget if budget > 0 else max(128, self.context_window_tokens // 2) async def _run_agent_loop( self, initial_messages: list[dict], on_progress: Callable[..., Awaitable[None]] | None = None, on_stream: Callable[[str], Awaitable[None]] | None = None, on_stream_end: Callable[..., Awaitable[None]] | None = None, on_retry_wait: Callable[[str], Awaitable[None]] | None = None, *, session: Session | None = None, channel: str = "cli", chat_id: str = "direct", message_id: str | None = None, metadata: dict[str, Any] | None = None, session_key: str | None = None, pending_queue: asyncio.Queue | None = None, ) -> tuple[str | None, list[str], list[dict], str, bool]: """Run the agent iteration loop. *on_stream*: called with each content delta during streaming. *on_stream_end(resuming)*: called when a streaming session finishes. ``resuming=True`` means tool calls follow (spinner should restart); ``resuming=False`` means this is the final response. Returns (final_content, tools_used, messages, stop_reason, had_injections). """ self._sync_subagent_runtime_limits() loop_hook = AgentProgressHook( on_progress=on_progress, on_stream=on_stream, on_stream_end=on_stream_end, channel=channel, chat_id=chat_id, message_id=message_id, metadata=metadata, session_key=session_key, tool_hint_max_length=self.tool_hint_max_length, set_tool_context=self._set_tool_context, on_iteration=lambda iteration: setattr(self, "_current_iteration", iteration), ) hook: AgentHook = ( CompositeHook([loop_hook] + self._extra_hooks) if self._extra_hooks else loop_hook ) async def _checkpoint(payload: dict[str, Any]) -> None: if session is None: return self._set_runtime_checkpoint(session, payload) async def _drain_pending(*, limit: int = _MAX_INJECTIONS_PER_TURN) -> list[dict[str, Any]]: """Drain follow-up messages from the pending queue. When no messages are immediately available but sub-agents spawned in this dispatch are still running, blocks until at least one result arrives (or timeout). This keeps the runner loop alive so subsequent sub-agent completions are consumed in-order rather than dispatched separately. """ if pending_queue is None: return [] def _to_user_message(pending_msg: InboundMessage) -> dict[str, Any]: content = pending_msg.content media = pending_msg.media if pending_msg.media else None if media: content, media = self._prepare_message_media(content, media) media = media or None user_content = self.context._build_user_content(content, media) return {"role": "user", "content": user_content} items: list[dict[str, Any]] = [] while len(items) < limit: try: items.append(_to_user_message(pending_queue.get_nowait())) except asyncio.QueueEmpty: break # Block if nothing drained but sub-agents spawned in this dispatch # are still running. Keeps the runner loop alive so subsequent # completions are injected in-order rather than dispatched separately. if (not items and session is not None and self.subagents.get_running_count_by_session(session.key) > 0): try: msg = await asyncio.wait_for(pending_queue.get(), timeout=300) except asyncio.TimeoutError: logger.warning( "Timeout waiting for sub-agent completion in session {}", session.key, ) return items items.append(_to_user_message(msg)) while len(items) < limit: try: items.append(_to_user_message(pending_queue.get_nowait())) except asyncio.QueueEmpty: break return items active_session_key = session.key if session else session_key effective_scope = self.workspace_scopes.for_turn( channel=channel, message_metadata=metadata, session_metadata=session.metadata if session is not None else None, ) request_ctx = RequestContext( channel=channel, chat_id=chat_id, message_id=message_id, session_key=active_session_key, metadata=dict(metadata or {}), ) file_state_token = bind_file_states(self._file_state_store.for_session(active_session_key)) request_token = bind_request_context(request_ctx) workspace_token = bind_workspace_scope(effective_scope) # Build continuation message that embeds the active goal objective so # the LLM can see it even if earlier Runtime Context was truncated. _goal_lines = goal_state_runtime_lines(session.metadata if session is not None else None) _goal_continue = ( "You have an active sustained goal:\n\n" + "\n".join(_goal_lines) + "\n\nPlease continue working toward the objective using your tools, " "or call complete_goal if the work is truly finished." ) if _goal_lines else SUSTAINED_GOAL_CONTINUE_PROMPT session_metadata = session.metadata if session is not None else None try: result = await self.runner.run(AgentRunSpec( initial_messages=initial_messages, tools=self.tools, model=self.model, max_iterations=self.max_iterations, max_tool_result_chars=self.max_tool_result_chars, hook=hook, error_message="Sorry, I encountered an error calling the AI model.", concurrent_tools=True, workspace=effective_scope.project_path, session_key=session.key if session else None, context_window_tokens=self.context_window_tokens, context_block_limit=self.context_block_limit, provider_retry_mode=self.provider_retry_mode, progress_callback=on_progress, stream_progress_deltas=on_stream is not None, retry_wait_callback=on_retry_wait, checkpoint_callback=_checkpoint, injection_callback=_drain_pending, # Sustained goals may legitimately exceed NANOBOT_LLM_TIMEOUT_S; idle stall # is still capped by NANOBOT_STREAM_IDLE_TIMEOUT_S in streaming providers. llm_timeout_s=runner_wall_llm_timeout_s( self.sessions, session.key if session is not None else session_key, metadata=session_metadata, message_metadata=metadata, ), goal_active_predicate=lambda: sustained_goal_active(session.metadata) if session is not None else False, goal_continue_message=_goal_continue, )) finally: reset_workspace_scope(workspace_token) reset_request_context(request_token) reset_file_states(file_state_token) self._last_usage = result.usage if result.stop_reason == "max_iterations": logger.warning("Max iterations ({}) reached", self.max_iterations) should_stream = turn_continuation.should_stream_budget_response( stop_reason=result.stop_reason, pending_queue_available=pending_queue is not None and session is not None, session_metadata=session_metadata, message_metadata=metadata, ) # Push final content through stream so streaming channels (e.g. Feishu) # update the card instead of leaving it empty. if on_stream and on_stream_end and should_stream: await on_stream(result.final_content or "") await on_stream_end(resuming=False) elif result.stop_reason == "error": logger.error("LLM returned error: {}", (result.final_content or "")[:200]) return result.final_content, result.tools_used, result.messages, result.stop_reason, result.had_injections async def run(self) -> None: """Run the agent loop, dispatching messages as tasks to stay responsive to /stop.""" self._running = True await self._connect_mcp() logger.info("Agent loop started") while self._running: try: msg = await asyncio.wait_for(self.bus.consume_inbound(), timeout=1.0) except asyncio.TimeoutError: self.auto_compact.check_expired( self._schedule_background, active_session_keys=self._pending_queues.keys(), ) continue except asyncio.CancelledError: # Preserve real task cancellation so shutdown can complete cleanly. # Only ignore non-task CancelledError signals that may leak from integrations. if not self._running or asyncio.current_task().cancelling(): raise continue except Exception as e: logger.warning("Error consuming inbound message: {}, continuing...", e) continue raw = msg.content.strip() effective_key = self._effective_session_key(msg) if await agent_context.handle_runtime_control(self, msg, self.tools): continue if self.commands.is_priority(raw): await self._dispatch_command_inline( msg, effective_key, raw, self.commands.dispatch_priority, ) continue # If this session already has an active pending queue (i.e. a task # is processing this session), route the message there for mid-turn # injection instead of creating a competing task. if effective_key in self._pending_queues: # Non-priority commands must not be queued for injection; # dispatch them directly (same pattern as priority commands). if self.commands.is_dispatchable_command(raw): await self._dispatch_command_inline( msg, effective_key, raw, self.commands.dispatch, ) continue pending_msg = msg if effective_key != msg.session_key: pending_msg = dataclasses.replace( msg, session_key_override=effective_key, ) try: self._pending_queues[effective_key].put_nowait(pending_msg) except asyncio.QueueFull: logger.warning( "Pending queue full for session {}, falling back to queued task", effective_key, ) else: logger.info( "Routed follow-up message to pending queue for session {}", effective_key, ) continue # Compute the effective session key before dispatching # This ensures /stop command can find tasks correctly when unified session is enabled task = asyncio.create_task(self._dispatch(msg)) self._active_tasks.setdefault(effective_key, []).append(task) task.add_done_callback( lambda t, k=effective_key: self._active_tasks.get(k, []) and self._active_tasks[k].remove(t) if t in self._active_tasks.get(k, []) else None ) async def _dispatch(self, msg: InboundMessage) -> None: """Process a message: per-session serial, cross-session concurrent.""" session_key = self._effective_session_key(msg) if session_key != msg.session_key: msg = dataclasses.replace(msg, session_key_override=session_key) lock = self._session_locks.setdefault(session_key, asyncio.Lock()) gate = self._concurrency_gate or nullcontext() pending: asyncio.Queue | None = None try: async with lock, gate: # Only the task that owns the session lock may publish the # active mid-turn injection queue for this session. pending = asyncio.Queue(maxsize=20) self._pending_queues[session_key] = pending try: on_stream = on_stream_end = None if msg.metadata.get("_wants_stream"): # Split one answer into distinct stream segments. stream_base_id = f"{msg.session_key}:{time.time_ns()}" stream_segment = 0 def _current_stream_id() -> str: return f"{stream_base_id}:{stream_segment}" async def on_stream(delta: str) -> None: meta = dict(msg.metadata or {}) meta["_stream_delta"] = True meta["_stream_id"] = _current_stream_id() await self.bus.publish_outbound(OutboundMessage( channel=msg.channel, chat_id=msg.chat_id, content=delta, metadata=meta, )) async def on_stream_end(*, resuming: bool = False) -> None: nonlocal stream_segment meta = dict(msg.metadata or {}) meta["_stream_end"] = True meta["_resuming"] = resuming meta["_stream_id"] = _current_stream_id() await self.bus.publish_outbound(OutboundMessage( channel=msg.channel, chat_id=msg.chat_id, content="", metadata=meta, )) stream_segment += 1 response = await self._process_message( msg, on_stream=on_stream, on_stream_end=on_stream_end, pending_queue=pending, ) completed_channel = msg.channel completed_chat_id = msg.chat_id if response is not None: await self.bus.publish_outbound(response) completed_channel = response.channel completed_chat_id = response.chat_id elif msg.channel == "cli": await self.bus.publish_outbound(OutboundMessage( channel=msg.channel, chat_id=msg.chat_id, content="", metadata=msg.metadata or {}, )) continuing = turn_continuation.internal_continuation_pending(msg.metadata) if not continuing: await self._runtime_events().turn_completed( channel=completed_channel, chat_id=completed_chat_id, session_key=session_key, metadata=msg.metadata, ) except asyncio.CancelledError: logger.info("Task cancelled for session {}", session_key) # Preserve partial context from the interrupted turn so # the user does not lose tool results and assistant # messages accumulated before /stop. The checkpoint was # already persisted to session metadata by # _emit_checkpoint during tool execution; materializing # it into session history now makes it visible in the # next conversation turn. try: key = self._effective_session_key(msg) session = self.sessions.get_or_create(key) if self._restore_runtime_checkpoint(session): self._clear_pending_user_turn(session) self.sessions.save(session) logger.info( "Restored partial context for cancelled session {}", key, ) except Exception: logger.debug( "Could not restore checkpoint for cancelled session {}", session_key, exc_info=True, ) raise except Exception: logger.exception("Error processing message for session {}", session_key) await self.bus.publish_outbound(OutboundMessage( channel=msg.channel, chat_id=msg.chat_id, content="Sorry, I encountered an error.", )) finally: # Drain any messages still in the pending queue and re-publish # them to the bus so they are processed as fresh inbound messages # rather than silently lost. Only remove our own queue; a # later task waiting on the lock must not be able to steal # cleanup ownership. queue = None if self._pending_queues.get(session_key) is pending: queue = self._pending_queues.pop(session_key, None) else: queue = pending if queue is not None: leftover = 0 while True: try: item = queue.get_nowait() except asyncio.QueueEmpty: break await self.bus.publish_inbound(item) leftover += 1 if leftover: logger.info( "Re-published {} leftover message(s) to bus for session {}", leftover, session_key, ) if not turn_continuation.internal_continuation_pending(msg.metadata): await self._runtime_events().run_status_changed( msg, session_key, "idle" ) self._runtime_events().clear_turn(session_key) finally: if pending is None: await self._runtime_events().run_status_changed( msg, session_key, "idle" ) self._runtime_events().clear_turn(session_key) async def close_mcp(self) -> None: """Drain pending background archives, then close MCP connections.""" if self._background_tasks: await asyncio.gather(*self._background_tasks, return_exceptions=True) self._background_tasks.clear() for name, stack in self._mcp_stacks.items(): try: await stack.aclose() except (RuntimeError, BaseExceptionGroup): logger.debug("MCP server '{}' cleanup error (can be ignored)", name) self._mcp_stacks.clear() def _schedule_background(self, coro) -> None: """Schedule a coroutine as a tracked background task (drained on shutdown).""" task = asyncio.create_task(coro) self._background_tasks.append(task) task.add_done_callback(self._background_tasks.remove) def stop(self) -> None: """Stop the agent loop.""" self._running = False logger.info("Agent loop stopping") async def _process_system_message( self, msg: InboundMessage, session_key: str | None = None, on_progress: Callable[..., Awaitable[None]] | None = None, on_stream: Callable[[str], Awaitable[None]] | None = None, on_stream_end: Callable[..., Awaitable[None]] | None = None, pending_queue: asyncio.Queue | None = None, ) -> OutboundMessage | None: """Process a system inbound message (e.g. subagent announce).""" channel, chat_id = ( msg.chat_id.split(":", 1) if ":" in msg.chat_id else ("cli", msg.chat_id) ) logger.info("Processing system message from {}", msg.sender_id) key = msg.session_key_override or f"{channel}:{chat_id}" session = self.sessions.get_or_create(key) if self._restore_runtime_checkpoint(session): self.sessions.save(session) if self._restore_pending_user_turn(session): self.sessions.save(session) session, pending = self.auto_compact.prepare_session(session, key) if pending: logger.info("Memory compact triggered for session {}", key) await self.consolidator.maybe_consolidate_by_tokens( session, replay_max_messages=self._max_messages, ) is_subagent = msg.sender_id == "subagent" if is_subagent and self._persist_subagent_followup(session, msg): logger.debug("Subagent result persisted for session {}", key) self.sessions.save(session) self._set_tool_context( channel, chat_id, msg.metadata.get("message_id"), msg.metadata, session_key=key, ) _hist_kwargs: dict[str, Any] = { "max_messages": self._max_messages, "max_tokens": self._replay_token_budget(), "include_timestamps": True, } history = session.get_history(**_hist_kwargs) current_role = "assistant" if is_subagent else "user" workspace_scope = self.workspace_scopes.for_message(msg, session.metadata) messages = self.context.build_messages( history=history, current_message="" if is_subagent else msg.content, channel=channel, chat_id=chat_id, current_role=current_role, sender_id=msg.sender_id, session_summary=pending, session_metadata=session.metadata, workspace=workspace_scope.project_path, runtime_state=self, inbound_message=msg, skip_runtime_lines=is_subagent, ) t_wall = time.time() final_content, _, all_msgs, stop_reason, _ = await self._run_agent_loop( messages, session=session, channel=channel, chat_id=chat_id, message_id=msg.metadata.get("message_id"), metadata=msg.metadata, session_key=key, pending_queue=pending_queue, ) wall_done = time.time() latency_ms = max(0, int((wall_done - t_wall) * 1000)) self._save_turn(session, all_msgs, 1 + len(history), turn_latency_ms=latency_ms) self._runtime_events().record_turn_latency(key, latency_ms) session.enforce_file_cap(on_archive=self.context.memory.raw_archive) self._clear_runtime_checkpoint(session) self.sessions.save(session) self._schedule_background( self.consolidator.maybe_consolidate_by_tokens( session, replay_max_messages=self._max_messages, ) ) content = final_content or "Background task completed." outbound_metadata: dict[str, Any] = {} if channel == "slack" and key.startswith("slack:") and key.count(":") >= 2: outbound_metadata["slack"] = {"thread_ts": key.split(":", 2)[2]} if origin_message_id := msg.metadata.get("origin_message_id"): outbound_metadata["origin_message_id"] = origin_message_id return OutboundMessage( channel=channel, chat_id=chat_id, content=content, metadata=outbound_metadata, ) async def _process_message( self, msg: InboundMessage, session_key: str | None = None, on_progress: Callable[..., Awaitable[None]] | None = None, on_stream: Callable[[str], Awaitable[None]] | None = None, on_stream_end: Callable[..., Awaitable[None]] | None = None, pending_queue: asyncio.Queue | None = None, ) -> OutboundMessage | None: """Process a single inbound message and return the response.""" self._refresh_provider_snapshot() if msg.channel == "system": return await self._process_system_message( msg, session_key=session_key, on_progress=on_progress, on_stream=on_stream, on_stream_end=on_stream_end, pending_queue=pending_queue, ) key = session_key or msg.session_key t0 = time.time() ctx = TurnContext( msg=msg, session=None, session_key=key, state=TurnState.RESTORE, turn_id=f"{key}:{time.time_ns()}", turn_wall_started_at=t0, visible_run_started_at=turn_continuation.internal_continuation_run_started_at( msg.metadata, ), on_progress=on_progress, on_stream=on_stream, on_stream_end=on_stream_end, pending_queue=pending_queue, ) while ctx.state is not TurnState.DONE: handler_name = f"_state_{ctx.state.name.lower()}" handler = getattr(self, handler_name, None) if handler is None: raise RuntimeError(f"Missing state handler for {ctx.state}") t0 = time.perf_counter() try: event = await handler(ctx) except Exception: duration = (time.perf_counter() - t0) * 1000 ctx.trace.append( StateTraceEntry( state=ctx.state, started_at=t0, duration_ms=duration, event="", error="exception", ) ) raise duration = (time.perf_counter() - t0) * 1000 ctx.trace.append( StateTraceEntry( state=ctx.state, started_at=t0, duration_ms=duration, event=event, ) ) logger.debug( "[turn {}] State {} took {:.1f}ms -> event {}", ctx.turn_id, ctx.state.name, duration, event, ) next_state = self._TRANSITIONS.get((ctx.state, event)) if next_state is None: raise RuntimeError( f"[turn {ctx.turn_id}] No transition from {ctx.state} " f"on event {event!r}" ) ctx.state = next_state logger.debug( "[turn {}] Turn completed after {} states", ctx.turn_id, len(ctx.trace), ) return ctx.outbound def _assemble_outbound( self, msg: InboundMessage, final_content: str, all_msgs: list[dict[str, Any]], stop_reason: str, had_injections: bool, on_stream: Callable[[str], Awaitable[None]] | None, *, turn_latency_ms: int | None = None, ) -> OutboundMessage | None: """Assemble the final outbound message from turn results.""" # MessageTool suppression if (mt := self.tools.get("message")) and isinstance(mt, MessageTool) and mt._sent_in_turn: if not had_injections or stop_reason == "empty_final_response": return None preview = final_content[:120] + "..." if len(final_content) > 120 else final_content logger.info("Response to {}:{}: {}", msg.channel, msg.sender_id, preview) meta = dict(msg.metadata or {}) if on_stream is not None and stop_reason not in {"error", "tool_error"}: meta["_streamed"] = True if turn_latency_ms is not None: meta["latency_ms"] = int(turn_latency_ms) return OutboundMessage( channel=msg.channel, chat_id=msg.chat_id, content=final_content, metadata=meta, ) async def _state_restore(self, ctx: TurnContext) -> TurnState: """Restore checkpoint / pending user turn; extract documents.""" msg = ctx.msg if msg.media: new_content, image_only = self._prepare_message_media(msg.content, msg.media) ctx.msg = dataclasses.replace(msg, content=new_content, media=image_only) msg = ctx.msg preview = msg.content[:80] + "..." if len(msg.content) > 80 else msg.content logger.info("Processing message from {}:{}: {}", msg.channel, msg.sender_id, preview) # Session is already fetched by the caller (_process_message) but # ensure it exists in case this handler is invoked independently. if ctx.session is None: ctx.session = self.sessions.get_or_create(ctx.session_key) await self._runtime_events().session_turn_started(msg, ctx.session_key) self.workspace_scopes.persist_message_scope(ctx.session, msg) if self._restore_runtime_checkpoint(ctx.session): self.sessions.save(ctx.session) if self._restore_pending_user_turn(ctx.session): self.sessions.save(ctx.session) return "ok" def _prepare_message_media(self, content: str, media: list[str]) -> tuple[str, list[str]]: if self._should_extract_document_text(): return extract_documents(content, media) return reference_non_image_attachments(content, media) def _should_extract_document_text(self) -> bool: if self.channels_config is None: return True return self.channels_config.extract_document_text async def _state_compact(self, ctx: TurnContext) -> str: ctx.session, pending = self.auto_compact.prepare_session(ctx.session, ctx.session_key) ctx.pending_summary = pending return "ok" async def _state_command(self, ctx: TurnContext) -> str: raw = ctx.msg.content.strip() cmd_ctx = CommandContext( msg=ctx.msg, session=ctx.session, key=ctx.session_key, raw=raw, loop=self ) result = await self.commands.dispatch(cmd_ctx) if result is not None: ctx.outbound = result # Shortcut commands skip BUILD and SAVE, so we must persist the # turn here so WebUI history hydration after _turn_end sees the # message. Mark messages with _command so get_history can filter # them out of LLM context. /new is excluded because it # intentionally clears the session. if raw.lower() != "/new": ctx.user_persisted_early = self._persist_user_message_early( ctx.msg, ctx.session, _command=True ) ctx.session.add_message( "assistant", result.content, _command=True ) self.sessions.save(ctx.session) self._clear_pending_user_turn(ctx.session) return "shortcut" return "dispatch" async def _state_build(self, ctx: TurnContext) -> str: await self.consolidator.maybe_consolidate_by_tokens( ctx.session, replay_max_messages=self._max_messages, ) self._set_tool_context( ctx.msg.channel, ctx.msg.chat_id, ctx.msg.metadata.get("message_id"), ctx.msg.metadata, session_key=ctx.session_key, ) if message_tool := self.tools.get("message"): if isinstance(message_tool, MessageTool): message_tool.start_turn() _hist_kwargs: dict[str, Any] = { "max_messages": self._max_messages, "max_tokens": self._replay_token_budget(), "include_timestamps": True, } ctx.history = ctx.session.get_history(**_hist_kwargs) self._runtime_events().record_turn_runtime( ctx.session_key, self.llm_runtime(), ) ctx.initial_messages = self._build_initial_messages( ctx.msg, ctx.session, ctx.history, ctx.pending_summary, ) ctx.user_persisted_early = self._persist_user_message_early( ctx.msg, ctx.session ) if ctx.on_progress is None: ctx.on_progress = await self._build_bus_progress_callback(ctx.msg) if ctx.on_retry_wait is None: ctx.on_retry_wait = await self._build_retry_wait_callback(ctx.msg) return "ok" async def _state_run(self, ctx: TurnContext) -> str: if ctx.visible_run_started_at is None: ctx.visible_run_started_at = time.time() await self._runtime_events().run_status_changed( ctx.msg, ctx.session_key, "running", started_at=ctx.visible_run_started_at, ) result = await self._run_agent_loop( ctx.initial_messages, on_progress=ctx.on_progress, on_stream=ctx.on_stream, on_stream_end=ctx.on_stream_end, on_retry_wait=ctx.on_retry_wait, session=ctx.session, channel=ctx.msg.channel, chat_id=ctx.msg.chat_id, message_id=ctx.msg.metadata.get("message_id"), metadata=ctx.msg.metadata, session_key=ctx.session_key, pending_queue=ctx.pending_queue, ) final_content, tools_used, all_msgs, stop_reason, had_injections = result ctx.final_content = final_content ctx.tools_used = tools_used ctx.all_messages = all_msgs ctx.stop_reason = stop_reason ctx.had_injections = had_injections await turn_continuation.maybe_continue_turn(ctx) return "ok" async def _state_save(self, ctx: TurnContext) -> str: turn_continuation.prepare_save_boundary(ctx) if ( (ctx.final_content is None or not ctx.final_content.strip()) and not ctx.suppress_response ): ctx.final_content = EMPTY_FINAL_RESPONSE_MESSAGE latency_started_at = ( ctx.visible_run_started_at if turn_continuation.internal_continuation_inbound(ctx.msg.metadata) and ctx.visible_run_started_at is not None else ctx.turn_wall_started_at ) ctx.turn_latency_ms = max(0, int((time.time() - latency_started_at) * 1000)) self._save_turn( ctx.session, ctx.all_messages, ctx.save_skip, turn_latency_ms=ctx.turn_latency_ms, ) self._runtime_events().record_turn_latency( ctx.session_key, ctx.turn_latency_ms, ) ctx.session.enforce_file_cap(on_archive=self.context.memory.raw_archive) self._clear_pending_user_turn(ctx.session) self._clear_runtime_checkpoint(ctx.session) self.sessions.save(ctx.session) self._schedule_background( self.consolidator.maybe_consolidate_by_tokens( ctx.session, replay_max_messages=self._max_messages, ) ) return "ok" async def _state_respond(self, ctx: TurnContext) -> str: if ctx.suppress_response: ctx.outbound = None return "ok" ctx.outbound = self._assemble_outbound( ctx.msg, ctx.final_content, ctx.all_messages, ctx.stop_reason, ctx.had_injections, ctx.on_stream, turn_latency_ms=ctx.turn_latency_ms, ) return "ok" def _sanitize_persisted_blocks( self, content: list[dict[str, Any]], *, should_truncate_text: bool = False, drop_runtime: bool = False, ) -> list[dict[str, Any]]: """Strip volatile multimodal payloads before writing session history.""" filtered: list[dict[str, Any]] = [] for block in content: if not isinstance(block, dict): filtered.append(block) continue if ( drop_runtime and block.get("type") == "text" and isinstance(block.get("text"), str) and block["text"].startswith(ContextBuilder._RUNTIME_CONTEXT_TAG) ): continue if block.get("type") == "image_url" and block.get("image_url", {}).get( "url", "" ).startswith("data:image/"): path = (block.get("_meta") or {}).get("path", "") filtered.append({"type": "text", "text": image_placeholder_text(path)}) continue if block.get("type") == "text" and isinstance(block.get("text"), str): text = block["text"] if should_truncate_text and len(text) > self.max_tool_result_chars: text = truncate_text_fn(text, self.max_tool_result_chars) filtered.append({**block, "text": text}) continue filtered.append(block) return filtered def _save_turn( self, session: Session, messages: list[dict], skip: int, *, turn_latency_ms: int | None = None, ) -> None: """Save new-turn messages into session, truncating large tool results.""" from datetime import datetime last_assistant_idx: int | None = None for m in messages[skip:]: entry = dict(m) role, content = entry.get("role"), entry.get("content") if role == "assistant" and not content and not entry.get("tool_calls"): continue # skip empty assistant messages — they poison session context if role == "tool": if isinstance(content, str) and len(content) > self.max_tool_result_chars: entry["content"] = truncate_text_fn(content, self.max_tool_result_chars) elif isinstance(content, list): filtered = self._sanitize_persisted_blocks(content, should_truncate_text=True) if not filtered: continue entry["content"] = filtered elif role == "user": if isinstance(content, str) and ContextBuilder._RUNTIME_CONTEXT_TAG in content: # Strip the runtime-context block appended at the end. tag_pos = content.find(ContextBuilder._RUNTIME_CONTEXT_TAG) before = content[:tag_pos].rstrip("\n ") if before: entry["content"] = before else: continue if isinstance(content, list): filtered = self._sanitize_persisted_blocks(content, drop_runtime=True) if not filtered: continue entry["content"] = filtered entry.setdefault("timestamp", datetime.now().isoformat()) session.messages.append(entry) if role == "assistant": last_assistant_idx = len(session.messages) - 1 if turn_latency_ms is not None and last_assistant_idx is not None: session.messages[last_assistant_idx]["latency_ms"] = int(turn_latency_ms) session.updated_at = datetime.now() def _persist_subagent_followup(self, session: Session, msg: InboundMessage) -> bool: """Persist subagent follow-ups before prompt assembly so history stays durable. Returns True if a new entry was appended; False if the follow-up was deduped (same ``subagent_task_id`` already in session) or carries no content worth persisting. """ if not msg.content: return False task_id = msg.metadata.get("subagent_task_id") if isinstance(msg.metadata, dict) else None if task_id and any( m.get("injected_event") == "subagent_result" and m.get("subagent_task_id") == task_id for m in session.messages ): return False session.add_message( "assistant", msg.content, sender_id=msg.sender_id, injected_event="subagent_result", subagent_task_id=task_id, ) return True def _set_runtime_checkpoint(self, session: Session, payload: dict[str, Any]) -> None: """Persist the latest in-flight turn state into session metadata.""" session.metadata[self._RUNTIME_CHECKPOINT_KEY] = payload self.sessions.save(session) def _mark_pending_user_turn(self, session: Session) -> None: session.metadata[self._PENDING_USER_TURN_KEY] = True def _clear_pending_user_turn(self, session: Session) -> None: session.metadata.pop(self._PENDING_USER_TURN_KEY, None) def _clear_runtime_checkpoint(self, session: Session) -> None: if self._RUNTIME_CHECKPOINT_KEY in session.metadata: session.metadata.pop(self._RUNTIME_CHECKPOINT_KEY, None) @staticmethod def _checkpoint_message_key(message: dict[str, Any]) -> tuple[Any, ...]: return ( message.get("role"), message.get("content"), message.get("tool_call_id"), message.get("name"), message.get("tool_calls"), message.get("reasoning_content"), message.get("thinking_blocks"), ) def _restore_runtime_checkpoint(self, session: Session) -> bool: """Materialize an unfinished turn into session history before a new request.""" from datetime import datetime checkpoint = session.metadata.get(self._RUNTIME_CHECKPOINT_KEY) if not isinstance(checkpoint, dict): return False assistant_message = checkpoint.get("assistant_message") completed_tool_results = checkpoint.get("completed_tool_results") or [] pending_tool_calls = checkpoint.get("pending_tool_calls") or [] restored_messages: list[dict[str, Any]] = [] if isinstance(assistant_message, dict): restored = dict(assistant_message) restored.setdefault("timestamp", datetime.now().isoformat()) restored_messages.append(restored) for message in completed_tool_results: if isinstance(message, dict): restored = dict(message) restored.setdefault("timestamp", datetime.now().isoformat()) restored_messages.append(restored) for tool_call in pending_tool_calls: if not isinstance(tool_call, dict): continue tool_id = tool_call.get("id") name = ((tool_call.get("function") or {}).get("name")) or "tool" restored_messages.append( { "role": "tool", "tool_call_id": tool_id, "name": name, "content": "Error: Task interrupted before this tool finished.", "timestamp": datetime.now().isoformat(), } ) overlap = 0 max_overlap = min(len(session.messages), len(restored_messages)) for size in range(max_overlap, 0, -1): existing = session.messages[-size:] restored = restored_messages[:size] if all( self._checkpoint_message_key(left) == self._checkpoint_message_key(right) for left, right in zip(existing, restored) ): overlap = size break session.messages.extend(restored_messages[overlap:]) self._clear_pending_user_turn(session) self._clear_runtime_checkpoint(session) return True def _restore_pending_user_turn(self, session: Session) -> bool: """Close a turn that only persisted the user message before crashing.""" from datetime import datetime if not session.metadata.get(self._PENDING_USER_TURN_KEY): return False if session.messages and session.messages[-1].get("role") == "user": session.messages.append( { "role": "assistant", "content": "Error: Task interrupted before a response was generated.", "timestamp": datetime.now().isoformat(), } ) session.updated_at = datetime.now() self._clear_pending_user_turn(session) return True async def process_direct( self, content: str, session_key: str = "cli:direct", channel: str = "cli", chat_id: str = "direct", media: list[str] | None = None, on_progress: Callable[..., Awaitable[None]] | None = None, on_stream: Callable[[str], Awaitable[None]] | None = None, on_stream_end: Callable[..., Awaitable[None]] | None = None, ) -> OutboundMessage | None: """Process a message directly and return the outbound payload.""" await self._connect_mcp() msg = InboundMessage( channel=channel, sender_id="user", chat_id=chat_id, content=content, media=media or [], ) # Share the dispatch lock so direct calls serialize with bus turns. lock = self._session_locks.setdefault(session_key, asyncio.Lock()) try: async with lock: return await self._process_message( msg, session_key=session_key, on_progress=on_progress, on_stream=on_stream, on_stream_end=on_stream_end, ) finally: await self._runtime_events().run_status_changed(msg, session_key, "idle") self._runtime_events().clear_turn(session_key)