refactor: remove IntentRouter from tasks.py, delete legacy ConversationStore

- tasks.py: replace IntentRouter.route() with default agent fallback (REACT mode)
- app.py: remove IntentRouter import and initialization
- portal.py: delete legacy in-memory ConversationStore class (~120 lines),
  SqliteConversationStore is the sole implementation now
- Remove unused SessionManager import from portal.py

Tests: 622 passed, 0 failed

src/agentkit/server/app.py

@@ -16,7 +16,6 @@ from agentkit.llm.providers.openai import OpenAICompatibleProvider
 from agentkit.mcp.manager import MCPManager
 from agentkit.quality.gate import QualityGate
 from agentkit.quality.output import OutputStandardizer
-from agentkit.router.intent import IntentRouter
 from agentkit.skills.base import Skill
 from agentkit.skills.registry import SkillRegistry
 from agentkit.tools.registry import ToolRegistry
@@ -385,8 +384,6 @@ def _on_config_change(app: FastAPI, config: ServerConfig) -> None:
                     # Also update the agent pool's gateway reference
                     if hasattr(app.state, "agent_pool") and app.state.agent_pool is not None:
                         app.state.agent_pool._llm_gateway = new_gateway
-                    if hasattr(app.state, "intent_router") and app.state.intent_router is not None:
-                        app.state.intent_router._llm_gateway = new_gateway
                     logger.info(f"LLM Gateway reloaded (config v{current_version})")
                 except Exception as e:
                     logger.error(f"Failed to reload LLM Gateway: {e}")
@@ -576,7 +573,6 @@ def create_app(
         compressor=compressor,
         message_bus=message_bus,
     )
-    app.state.intent_router = IntentRouter(llm_gateway=app.state.llm_gateway)
     app.state.quality_gate = QualityGate()
     app.state.output_standardizer = OutputStandardizer()
 

src/agentkit/server/routes/portal.py

@@ -30,7 +30,6 @@ from agentkit.server.routes.evolution_dashboard import (
 )
 from agentkit.core.fallback import EMPTY_LLM_RESPONSE
 from agentkit.chat.sqlite_conversation_store import SqliteConversationStore
-from agentkit.session.manager import SessionManager
 
 logger = logging.getLogger(__name__)
 
@@ -96,128 +95,6 @@ class Conversation:
     updated_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
 
 
-class ConversationStore:
-    """In-memory conversation store with optional SessionManager persistence.
-
-    When a session_manager is provided, messages are also persisted via
-    SessionManager (which supports file/redis backends). On startup,
-    conversations can be restored from SessionManager.
-    """
-
-    def __init__(
-        self, max_conversations: int = 1000, session_manager: SessionManager | None = None
-    ):
-        self._conversations: dict[str, Conversation] = {}
-        self._max = max_conversations
-        self._session_manager = session_manager
-
-    def set_session_manager(self, sm: SessionManager | None) -> None:
-        """Set or update the session manager for persistence."""
-        self._session_manager = sm
-
-    async def restore_from_store(
-        self,
-        max_sessions: int = 50,
-        max_messages_per_session: int = 100,
-    ) -> None:
-        """Restore recent conversations from SessionManager on startup.
-
-        Loads the most recent sessions and their messages so that
-        ConversationStore is populated after a server restart.
-        Limits are applied to prevent memory exhaustion on startup.
-        """
-        if self._session_manager is None:
-            return
-        try:
-            sessions = await self._session_manager.list_sessions(limit=max_sessions)
-            for session in sessions:
-                sid = session.session_id
-                if sid in self._conversations:
-                    continue
-                # Reconstruct Conversation from persisted session
-                conv = Conversation(
-                    id=sid,
-                    created_at=session.created_at,
-                    updated_at=session.updated_at,
-                )
-                messages = await self._session_manager.get_messages(
-                    sid, limit=max_messages_per_session
-                )
-                for msg in messages:
-                    conv.messages.append(
-                        ChatMessage(
-                            role=msg.role.value,
-                            content=msg.content,
-                            timestamp=msg.created_at,
-                            metadata=msg.metadata,
-                        )
-                    )
-                self._conversations[sid] = conv
-            logger.info(f"Restored {len(self._conversations)} conversations from SessionManager")
-        except Exception as e:
-            logger.warning(f"Failed to restore conversations from SessionManager: {e}")
-
-    def get_or_create(self, conversation_id: str | None = None) -> Conversation:
-        if conversation_id and conversation_id in self._conversations:
-            conv = self._conversations[conversation_id]
-            conv.updated_at = datetime.now(timezone.utc)
-            return conv
-
-        cid = conversation_id or str(uuid.uuid4())
-        conv = Conversation(id=cid)
-        self._conversations[cid] = conv
-        # Evict oldest if over limit
-        if len(self._conversations) > self._max:
-            oldest_id = min(self._conversations, key=lambda k: self._conversations[k].updated_at)
-            del self._conversations[oldest_id]
-        return conv
-
-    async def add_message(
-        self, conversation_id: str, role: str, content: str, metadata: dict | None = None
-    ) -> ChatMessage:
-        """Add a message to conversation, with optional persistence."""
-        conv = self._conversations.get(conversation_id)
-        if conv is None:
-            raise KeyError(f"Conversation '{conversation_id}' not found")
-        msg = ChatMessage(
-            role=role,
-            content=content,
-            metadata=metadata or {},
-        )
-        conv.messages.append(msg)
-        conv.updated_at = datetime.now(timezone.utc)
-
-        # Persist to SessionManager if available
-        if self._session_manager is not None:
-            try:
-                from agentkit.session.models import MessageRole
-
-                sm = self._session_manager
-                role_enum = MessageRole.USER if role == "user" else MessageRole.ASSISTANT
-                await sm.append_message(
-                    session_id=conversation_id,
-                    role=role_enum,
-                    content=content,
-                    metadata=metadata,
-                )
-            except Exception as e:
-                logger.warning(f"Failed to persist message to SessionManager: {e}")
-
-        return msg
-
-    def get_history(self, conversation_id: str, limit: int = 50) -> list[ChatMessage]:
-        conv = self._conversations.get(conversation_id)
-        if conv is None:
-            return []
-        return conv.messages[-limit:]
-
-    def list_conversations(self, limit: int = 20) -> list[Conversation]:
-        sorted_convs = sorted(
-            self._conversations.values(), key=lambda c: c.updated_at, reverse=True
-        )
-        return sorted_convs[:limit]
-
-
 # Heartbeat timeout in seconds — 0 disables timeout (for testing)
 _WS_HEARTBEAT_TIMEOUT = float(os.environ.get("AGENTKIT_WS_TIMEOUT", "120"))
 _conversation_store = SqliteConversationStore()

src/agentkit/server/routes/tasks.py

@@ -60,7 +60,6 @@ async def submit_task(request: SubmitTaskRequest, req: Request):
 
     pool = req.app.state.agent_pool
     skill_registry = req.app.state.skill_registry
-    intent_router = req.app.state.intent_router
     quality_gate = req.app.state.quality_gate
     output_standardizer = req.app.state.output_standardizer
 
@@ -93,7 +92,7 @@ async def submit_task(request: SubmitTaskRequest, req: Request):
         if agent is None:
             agent = await pool.create_agent_from_skill(request.skill_name)
 
-    # 3. Otherwise, use Intent Router to find matching skill
+    # 3. Otherwise, use default agent (REACT mode — LLM decides autonomously)
     else:
         all_skills = skill_registry.list_skills()
         if not all_skills:
@@ -101,15 +100,10 @@ async def submit_task(request: SubmitTaskRequest, req: Request):
                 status_code=400,
                 detail="No skills registered and no skill_name or agent_name specified",
             )
-        try:
+        agent = pool.get_agent("default")
-            routing_result = await intent_router.route(request.input_data, all_skills)
-            skill = skill_registry.get(routing_result.matched_skill)
-            # Get or create agent for this skill
-            agent = pool.get_agent(routing_result.matched_skill)
         if agent is None:
-                agent = await pool.create_agent_from_skill(routing_result.matched_skill)
+            # Fallback: create from first available skill
-        except (ValueError, RuntimeError) as e:
+            agent = await pool.create_agent_from_skill(all_skills[0].name)
-            raise HTTPException(status_code=400, detail=str(e))
 
     # 4. Async mode: submit to background runner
     if request.mode == "async":
@@ -214,7 +208,6 @@ async def stream_task(request: SubmitTaskRequest, req: Request):
 
     pool = req.app.state.agent_pool
     skill_registry = req.app.state.skill_registry
-    intent_router = req.app.state.intent_router
 
     agent = None
 
@@ -244,14 +237,10 @@ async def stream_task(request: SubmitTaskRequest, req: Request):
                 status_code=400,
                 detail="No skills registered and no skill_name or agent_name specified",
             )
-        try:
+        agent = pool.get_agent("default")
-            routing_result = await intent_router.route(request.input_data, all_skills)
-            skill_registry.get(routing_result.matched_skill)
-            agent = pool.get_agent(routing_result.matched_skill)
         if agent is None:
-                agent = await pool.create_agent_from_skill(routing_result.matched_skill)
+            # Fallback: create from first available skill
-        except (ValueError, RuntimeError) as e:
+            agent = await pool.create_agent_from_skill(all_skills[0].name)
-            raise HTTPException(status_code=400, detail=str(e))
 
     async def event_generator():
         import logging