refactor: 重命名 agent_chat 模块为 agent

apps/lib/features/chat/data/models/ag_ui_event.dart

@@ -15,6 +15,7 @@ class AgUiEventTypeWire {
   static const toolCallEnd = 'TOOL_CALL_END';
   static const toolCallResult = 'TOOL_CALL_RESULT';
   static const toolCallError = 'TOOL_CALL_ERROR';
+  static const messagesSnapshot = 'MESSAGES_SNAPSHOT';
 }
 
 enum AgUiEventType {
@@ -29,6 +30,7 @@ enum AgUiEventType {
   toolCallEnd,
   toolCallResult,
   toolCallError,
+  messagesSnapshot,
   unknown,
 }
 
@@ -44,6 +46,7 @@ const _wireToTypeMap = {
   AgUiEventTypeWire.toolCallEnd: AgUiEventType.toolCallEnd,
   AgUiEventTypeWire.toolCallResult: AgUiEventType.toolCallResult,
   AgUiEventTypeWire.toolCallError: AgUiEventType.toolCallError,
+  AgUiEventTypeWire.messagesSnapshot: AgUiEventType.messagesSnapshot,
 };
 
 const _typeToWireMap = {

backend/src/core/agent/agui_adapter.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import Any
 
-from core.agent_chat.event_bridge import map_internal_event
+from core.agent.event_bridge import map_internal_event
 
 
 class AguiAdapter:

backend/src/core/agent/crewai/template_loader.py

@@ -17,7 +17,7 @@ class CrewAITemplate:
 
 
 def _default_static_root() -> Path:
-    return Path(__file__).resolve().parents[3] / "config" / "static" / "agent_chat"
+    return Path(__file__).resolve().parents[3] / "config" / "static" / "agent"
 
 
 def _read_yaml(file_path: Path) -> dict[str, Any]:

backend/src/core/agent/multimodal.py

@@ -5,7 +5,7 @@ import hashlib
 from pathlib import Path
 from typing import Protocol
 
-from core.agent_chat.storage_adapter import StorageAdapter
+from core.agent.storage_adapter import StorageAdapter
 
 _ALLOWED_MIME_TYPES = {
     "audio/mpeg",

backend/src/core/agent/orchestrator.py

@@ -4,8 +4,8 @@ import asyncio
 from dataclasses import dataclass
 from typing import Any, Awaitable, Callable
 
-from core.agent_chat.cost_tracker import CostTracker
+from core.agent.cost_tracker import CostTracker
-from core.agent_chat import events
+from core.agent import events
 
 StageCallable = Callable[..., Awaitable[dict[str, Any]]]
 

backend/src/core/initialization/init_data.py

@@ -38,7 +38,7 @@ def _default_catalog_path() -> Path:
         Path(__file__).resolve().parents[1]
         / "config"
         / "static"
-        / "agent_chat"
+        / "agent"
         / "llm_catalog.yaml"
     )
 

backend/src/v1/agent/dependencies.py

@@ -7,11 +7,11 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from core.auth.models import CurrentUser
 from core.db import get_db
-from v1.agent_chat.service import AgentChatService
+from v1.agent.service import AgentChatService
 from v1.profile.dependencies import get_current_user
 
 
-def get_agent_chat_service(
+def get_agent_service(
     session: Annotated[AsyncSession, Depends(get_db)],
     user: Annotated[CurrentUser, Depends(get_current_user)],
 ) -> AgentChatService:

backend/src/v1/agent/router.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from typing import Annotated
+
+from fastapi import APIRouter, Depends
+
+from v1.agent.dependencies import get_agent_service
+from v1.agent.schemas import AgentChatRunRequest, AgentChatRunResponse
+from v1.agent.service import AgentChatService
+
+router = APIRouter(prefix="/agent", tags=["agent"])
+
+
+@router.post("", response_model=AgentChatRunResponse)
+async def run_agent_chat(
+    payload: AgentChatRunRequest,
+    service: Annotated[AgentChatService, Depends(get_agent_service)],
+) -> AgentChatRunResponse:
+    return await service.run(payload)

backend/src/v1/agent/service.py

@@ -9,15 +9,15 @@ from fastapi import HTTPException
 from sqlalchemy import func, select
 from sqlalchemy.exc import SQLAlchemyError
 
-from core.agent_chat.agui_adapter import AguiAdapter
+from core.agent.agui_adapter import AguiAdapter
-from core.agent_chat.orchestrator import AgentChatOrchestrator
+from core.agent.orchestrator import AgentChatOrchestrator
 from core.auth.models import CurrentUser
 from core.db.base_service import BaseService
 from core.logging import get_logger
 from models.agent_chat_message import AgentChatMessage, AgentChatMessageRole
 from models.agent_chat_session import AgentChatSession, AgentChatSessionStatus
 from v1.auth.rate_limit import enforce_rate_limit
-from v1.agent_chat.schemas import (
+from v1.agent.schemas import (
     AgentChatEvent,
     AgentChatRunRequest,
     AgentChatRunResponse,
@@ -26,7 +26,7 @@ from v1.agent_chat.schemas import (
 if TYPE_CHECKING:
     from sqlalchemy.ext.asyncio import AsyncSession
 
-logger = get_logger("v1.agent_chat.service")
+logger = get_logger("v1.agent.service")
 
 
 def build_session_title(first_message: str, *, now: datetime) -> str:
@@ -73,7 +73,7 @@ class AgentChatService(BaseService):
             raise HTTPException(status_code=422, detail=str(exc)) from exc
         user_id = self.require_user_id()
         await enforce_rate_limit(
-            scope="agent_chat_run",
+            scope="agent_run",
             identifier=str(user_id),
             limit=60,
             window_seconds=60,

backend/src/v1/agent_chat/router.py

@@ -1,19 +0,0 @@
-from __future__ import annotations
-
-from typing import Annotated
-
-from fastapi import APIRouter, Depends
-
-from v1.agent_chat.dependencies import get_agent_chat_service
-from v1.agent_chat.schemas import AgentChatRunRequest, AgentChatRunResponse
-from v1.agent_chat.service import AgentChatService
-
-router = APIRouter(prefix="/agent-chat", tags=["agent-chat"])
-
-
-@router.post("", response_model=AgentChatRunResponse)
-async def run_agent_chat(
-    payload: AgentChatRunRequest,
-    service: Annotated[AgentChatService, Depends(get_agent_chat_service)],
-) -> AgentChatRunResponse:
-    return await service.run(payload)

backend/src/v1/router.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 from fastapi import APIRouter
 
 from core.http.models import HealthResponse
-from v1.agent_chat.router import router as agent_chat_router
+from v1.agent.router import router as agent_router
 from v1.auth.router import router as auth_router
 from v1.friendships.router import router as friendships_router
 from v1.inbox_messages.router import router as inbox_messages_router
@@ -17,7 +17,7 @@ router.include_router(auth_router)
 router.include_router(friendships_router)
 router.include_router(infra_router)
 router.include_router(users_router)
-router.include_router(agent_chat_router)
+router.include_router(agent_router)
 router.include_router(schedule_items_router)
 router.include_router(inbox_messages_router)
 

backend/tests/e2e/test_agent_chat_flow.py

@@ -10,13 +10,13 @@ from playwright.sync_api import sync_playwright
 import uvicorn
 
 from app import app
-from v1.agent_chat.dependencies import get_agent_chat_service
+from v1.agent.dependencies import get_agent_service
-from v1.agent_chat.schemas import (
+from v1.agent.schemas import (
     AgentChatEvent,
     AgentChatRunRequest,
     AgentChatRunResponse,
 )
-from v1.agent_chat.service import AgentChatService
+from v1.agent.service import AgentChatService
 
 
 class FakeE2EAgentChatService(AgentChatService):
@@ -66,7 +66,7 @@ def _start_server(host: str, port: int):
 
 
 def test_agent_chat_flow_e2e() -> None:
-    app.dependency_overrides[get_agent_chat_service] = lambda: FakeE2EAgentChatService()
+    app.dependency_overrides[get_agent_service] = lambda: FakeE2EAgentChatService()
     host = "127.0.0.1"
     port = _find_free_port()
     server, thread = _start_server(host, port)

backend/tests/e2e/test_agent_chat_recent_session_home.py

@@ -5,7 +5,7 @@ from decimal import Decimal
 from uuid import UUID
 
 from models.agent_chat_session import AgentChatSession, AgentChatSessionStatus
-from v1.agent_chat.service import select_recent_session
+from v1.agent.service import select_recent_session
 
 
 def test_recent_session_home_default_selection() -> None:

backend/tests/integration/test_agent_chat_event_persistence.py

@@ -10,8 +10,8 @@ import pytest
 from core.auth.models import CurrentUser
 from models.agent_chat_message import AgentChatMessage, AgentChatMessageRole
 from models.agent_chat_session import AgentChatSession, AgentChatSessionStatus
-from v1.agent_chat.schemas import AgentChatRunRequest
+from v1.agent.schemas import AgentChatRunRequest
-from v1.agent_chat.service import AgentChatService
+from v1.agent.service import AgentChatService
 
 
 class _FakeAsyncSession:

backend/tests/integration/test_agent_chat_routes.py

@@ -6,13 +6,13 @@ from uuid import UUID
 from fastapi.testclient import TestClient
 
 from app import app
-from v1.agent_chat.dependencies import get_agent_chat_service
+from v1.agent.dependencies import get_agent_service
-from v1.agent_chat.schemas import (
+from v1.agent.schemas import (
     AgentChatEvent,
     AgentChatRunRequest,
     AgentChatRunResponse,
 )
-from v1.agent_chat.service import AgentChatService
+from v1.agent.service import AgentChatService
 
 
 class FakeAgentChatService:
@@ -46,7 +46,7 @@ def _override_agent_chat_service(
 
 
 def test_run_route_returns_response() -> None:
-    app.dependency_overrides[get_agent_chat_service] = _override_agent_chat_service(
+    app.dependency_overrides[get_agent_service] = _override_agent_chat_service(
         FakeAgentChatService()
     )
 
@@ -66,7 +66,7 @@ def test_run_route_returns_response() -> None:
 
 
 def test_run_route_validates_payload() -> None:
-    app.dependency_overrides[get_agent_chat_service] = _override_agent_chat_service(
+    app.dependency_overrides[get_agent_service] = _override_agent_chat_service(
         FakeAgentChatService()
     )
 

backend/tests/integration/test_agent_chat_session_persistence.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from decimal import Decimal
 
-from v1.agent_chat.service import aggregate_session_cost
+from v1.agent.service import aggregate_session_cost
 
 
 def test_aggregate_session_cost_sums_non_negative_values() -> None:

backend/tests/integration/test_agent_chat_session_recent_selection.py

@@ -5,7 +5,7 @@ from decimal import Decimal
 from uuid import UUID
 
 from models.agent_chat_session import AgentChatSession, AgentChatSessionStatus
-from v1.agent_chat.service import select_recent_session
+from v1.agent.service import select_recent_session
 
 
 def test_select_recent_session_uses_last_activity_desc() -> None:

backend/tests/unit/core/agent/test_agui_adapter.py

@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+import pytest
+
+from core.agent.agui_adapter import AguiAdapter
+
+
+def test_to_command_maps_payload_fields() -> None:
+    adapter = AguiAdapter()
+
+    command = adapter.to_command(
+        {
+            "message": "hello",
+            "session_id": "00000000-0000-0000-0000-000000000001",
+        }
+    )
+
+    assert command["message"] == "hello"
+    assert command["session_id"] == "00000000-0000-0000-0000-000000000001"
+
+
+def test_to_protocol_event_maps_internal_event() -> None:
+    adapter = AguiAdapter()
+
+    mapped = adapter.to_protocol_event(
+        {
+            "kind": "run_completed",
+            "session_id": "run-1",
+            "output": "done",
+        }
+    )
+
+    assert mapped == {"type": "run.completed", "run_id": "run-1", "output": "done"}
+
+
+def test_to_protocol_event_raises_for_invalid_event() -> None:
+    adapter = AguiAdapter()
+
+    with pytest.raises(ValueError):
+        adapter.to_protocol_event({"kind": "unknown"})

backend/tests/unit/core/agent/test_asr_fun_asr_tool.py

@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+import pytest
+
+from core.agent.tools.asr_fun_asr import FunASRTool
+
+
+def test_transcribe_uses_injected_dashscope_callable() -> None:
+    def fake_transcribe(*, audio_bytes: bytes, filename: str) -> dict[str, str]:
+        assert filename == "voice.wav"
+        assert audio_bytes == b"audio"
+        return {"text": "你好", "request_id": "req-1"}
+
+    tool = FunASRTool(transcribe_callable=fake_transcribe)
+
+    result = tool.transcribe(audio_bytes=b"audio", filename="voice.wav")
+
+    assert result["text"] == "你好"
+    assert result["request_id"] == "req-1"
+    assert result["model"] == "fun-asr-realtime-2025-11-07"
+
+
+def test_transcribe_raises_runtime_error_when_provider_fails() -> None:
+    def fake_transcribe(*, audio_bytes: bytes, filename: str) -> dict[str, str]:
+        raise RuntimeError("upstream timeout")
+
+    tool = FunASRTool(transcribe_callable=fake_transcribe)
+
+    with pytest.raises(RuntimeError):
+        tool.transcribe(audio_bytes=b"audio", filename="voice.wav")

backend/tests/unit/core/agent/test_cost_tracker.py

@@ -0,0 +1,82 @@
+from __future__ import annotations
+
+from decimal import Decimal
+
+import pytest
+
+from core.agent.cost_tracker import CostTracker
+
+
+def test_normalize_usage_and_cost_aggregation() -> None:
+    tracker = CostTracker()
+
+    tracker.add_usage(
+        {
+            "prompt_tokens": 7,
+            "completion_tokens": 5,
+            "cost": "0.002500",
+        }
+    )
+    tracker.add_usage(
+        {
+            "input_tokens": 5,
+            "output_tokens": 3,
+            "cost": "0.003000",
+            "currency": "USD",
+        }
+    )
+
+    snapshot = tracker.snapshot()
+
+    assert snapshot["input_tokens"] == 12
+    assert snapshot["output_tokens"] == 8
+    assert snapshot["total_tokens"] == 20
+    assert snapshot["cost"] == Decimal("0.005500")
+    assert snapshot["currency"] == "USD"
+
+
+def test_add_usage_rejects_negative_values() -> None:
+    tracker = CostTracker()
+
+    with pytest.raises(ValueError):
+        tracker.add_usage({"input_tokens": -1})
+
+    with pytest.raises(ValueError):
+        tracker.add_usage({"cost": "-0.010000"})
+
+
+def test_snapshot_is_zero_before_any_usage() -> None:
+    tracker = CostTracker()
+
+    snapshot = tracker.snapshot()
+
+    assert snapshot["input_tokens"] == 0
+    assert snapshot["output_tokens"] == 0
+    assert snapshot["total_tokens"] == 0
+    assert snapshot["cost"] == Decimal("0")
+    assert snapshot["currency"] == "USD"
+
+
+def test_add_usage_rejects_currency_mismatch() -> None:
+    tracker = CostTracker(currency="USD")
+    tracker.add_usage({"input_tokens": 1, "output_tokens": 1, "cost": "0.001000"})
+
+    with pytest.raises(ValueError):
+        tracker.add_usage(
+            {
+                "input_tokens": 1,
+                "output_tokens": 1,
+                "cost": "0.001000",
+                "currency": "CNY",
+            }
+        )
+
+
+def test_add_usage_rejects_non_integral_token_values() -> None:
+    tracker = CostTracker()
+
+    with pytest.raises(ValueError):
+        tracker.add_usage({"input_tokens": 1.5})
+
+    with pytest.raises(ValueError):
+        tracker.add_usage({"output_tokens": True})

backend/tests/unit/core/agent/test_event_bridge.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+import pytest
+
+from core.agent.event_bridge import map_internal_event
+
+
+def test_map_run_started_event() -> None:
+    event = {"kind": "run_started", "session_id": "s1"}
+
+    mapped = map_internal_event(event)
+
+    assert mapped == {"type": "run.started", "run_id": "s1"}
+
+
+def test_map_message_delta_event() -> None:
+    event = {"kind": "message_delta", "message_id": "m1", "delta": "hello"}
+
+    mapped = map_internal_event(event)
+
+    assert mapped == {"type": "message.delta", "message_id": "m1", "delta": "hello"}
+
+
+def test_map_tool_events() -> None:
+    started = {
+        "kind": "tool_started",
+        "message_id": "m2",
+        "tool_name": "asr_fun_asr",
+    }
+    completed = {
+        "kind": "tool_completed",
+        "message_id": "m2",
+        "tool_name": "asr_fun_asr",
+        "result": "ok",
+    }
+
+    mapped_started = map_internal_event(started)
+    mapped_completed = map_internal_event(completed)
+
+    assert mapped_started["type"] == "tool.started"
+    assert mapped_started["tool_name"] == "asr_fun_asr"
+    assert mapped_completed["type"] == "tool.completed"
+    assert mapped_completed["result"] == "ok"
+
+
+def test_map_run_completed_event() -> None:
+    event = {"kind": "run_completed", "session_id": "s1", "output": "done"}
+
+    mapped = map_internal_event(event)
+
+    assert mapped == {"type": "run.completed", "run_id": "s1", "output": "done"}
+
+
+def test_map_unknown_event_raises() -> None:
+    with pytest.raises(ValueError):
+        map_internal_event({"kind": "unknown"})
+
+
+def test_map_event_missing_required_field_raises_value_error() -> None:
+    with pytest.raises(ValueError):
+        map_internal_event({"kind": "message_delta", "message_id": "m1"})

backend/tests/unit/core/agent/test_multimodal.py

@@ -0,0 +1,89 @@
+from __future__ import annotations
+
+import pytest
+
+from core.agent.multimodal import AttachmentInput, MultimodalProcessor
+from core.agent.storage_adapter import StorageAdapter
+from core.agent.tools.asr_fun_asr import FunASRTool
+
+
+def test_multimodal_processes_audio_and_builds_attachment_context() -> None:
+    storage = StorageAdapter(bucket="agent-chat-attachments")
+
+    def fake_transcribe(*, audio_bytes: bytes, filename: str) -> dict[str, str]:
+        assert audio_bytes == b"audio"
+        assert filename == "voice.wav"
+        return {"text": "hello world", "request_id": "req-1"}
+
+    processor = MultimodalProcessor(
+        storage=storage,
+        asr_tool=FunASRTool(transcribe_callable=fake_transcribe),
+        max_file_size_mb=1,
+    )
+
+    result = processor.process(
+        user_id="u1",
+        session_id="s1",
+        message_seq=4,
+        attachments=[
+            AttachmentInput(
+                filename="voice.wav",
+                mime_type="audio/wav",
+                content=b"audio",
+            )
+        ],
+    )
+
+    assert len(result.attachments) == 1
+    metadata = result.attachments[0]
+    assert (
+        metadata["object_path"]
+        == "agent-chat/u1/s1/4/6ed8919ce20490a5e3ad8630a4fab69475297abd07db73918dd5f36fcfaeb11b.wav"
+    )
+    assert metadata["mime_type"] == "audio/wav"
+    assert result.preview_texts == ["hello world"]
+
+
+def test_multimodal_rejects_unsupported_mime_type() -> None:
+    storage = StorageAdapter(bucket="agent-chat-attachments")
+    processor = MultimodalProcessor(
+        storage=storage, asr_tool=FunASRTool(lambda **_: {})
+    )
+
+    with pytest.raises(ValueError):
+        processor.process(
+            user_id="u1",
+            session_id="s1",
+            message_seq=1,
+            attachments=[
+                AttachmentInput(
+                    filename="malware.exe",
+                    mime_type="application/octet-stream",
+                    content=b"bad",
+                )
+            ],
+        )
+
+
+def test_multimodal_rejects_attachment_over_max_size() -> None:
+    storage = StorageAdapter(bucket="agent-chat-attachments")
+    processor = MultimodalProcessor(
+        storage=storage,
+        asr_tool=FunASRTool(lambda **_: {}),
+        max_file_size_mb=1,
+    )
+
+    oversized = b"x" * (1024 * 1024 + 1)
+    with pytest.raises(ValueError):
+        processor.process(
+            user_id="u1",
+            session_id="s1",
+            message_seq=1,
+            attachments=[
+                AttachmentInput(
+                    filename="big.wav",
+                    mime_type="audio/wav",
+                    content=oversized,
+                )
+            ],
+        )

backend/tests/unit/core/agent/test_orchestrator_pipeline.py

@@ -0,0 +1,104 @@
+from __future__ import annotations
+
+from core.agent.orchestrator import AgentChatOrchestrator
+
+
+async def _intent_stage(
+    *, message: str, context: dict[str, object]
+) -> dict[str, object]:
+    sequence = context.setdefault("sequence", [])
+    if isinstance(sequence, list):
+        sequence.append("intent")
+    return {
+        "content": f"intent:{message}",
+        "usage": {"input_tokens": 2, "output_tokens": 1, "cost": "0.001000"},
+    }
+
+
+async def _execution_stage(
+    *, message: str, context: dict[str, object]
+) -> dict[str, object]:
+    sequence = context.setdefault("sequence", [])
+    if isinstance(sequence, list):
+        sequence.append("execution")
+    return {
+        "content": f"execution:{message}",
+        "usage": {"input_tokens": 3, "output_tokens": 2, "cost": "0.002000"},
+    }
+
+
+async def _organization_stage(
+    *, message: str, context: dict[str, object]
+) -> dict[str, object]:
+    sequence = context.setdefault("sequence", [])
+    if isinstance(sequence, list):
+        sequence.append("organization")
+    return {
+        "content": "final answer",
+        "usage": {"input_tokens": 4, "output_tokens": 1, "cost": "0.001500"},
+    }
+
+
+def test_orchestrator_runs_three_stages_in_order() -> None:
+    orchestrator = AgentChatOrchestrator(
+        intent_stage=_intent_stage,
+        execution_stage=_execution_stage,
+        organization_stage=_organization_stage,
+    )
+
+    result = orchestrator.run_sync(run_id="run-1", user_message="hello")
+
+    assert result.context["sequence"] == ["intent", "execution", "organization"]
+    assert result.output == "final answer"
+    assert result.usage["total_tokens"] == 13
+    assert result.events[0]["type"] == "run.started"
+    assert result.events[-1]["type"] == "run.completed"
+
+
+async def _failing_execution_stage(
+    *, message: str, context: dict[str, object]
+) -> dict[str, object]:
+    sequence = context.setdefault("sequence", [])
+    if isinstance(sequence, list):
+        sequence.append("execution")
+    raise RuntimeError("boom")
+
+
+def test_orchestrator_stops_and_marks_failed_when_middle_stage_raises() -> None:
+    orchestrator = AgentChatOrchestrator(
+        intent_stage=_intent_stage,
+        execution_stage=_failing_execution_stage,
+        organization_stage=_organization_stage,
+    )
+
+    result = orchestrator.run_sync(run_id="run-2", user_message="hello")
+
+    assert result.context["sequence"] == ["intent", "execution"]
+    assert result.events[-1]["type"] == "run.failed"
+    assert result.events[-1]["run_id"] == "run-2"
+    assert "boom" in (result.events[-1].get("error") or "")
+    assert result.failed is True
+    assert "boom" in (result.error or "")
+
+
+def test_orchestrator_emits_stage_event_payload_shape() -> None:
+    orchestrator = AgentChatOrchestrator(
+        intent_stage=_intent_stage,
+        execution_stage=_execution_stage,
+        organization_stage=_organization_stage,
+    )
+
+    result = orchestrator.run_sync(run_id="run-3", user_message="hello")
+
+    for event in result.events:
+        assert "type" in event
+        assert event.get("run_id") == "run-3"
+
+    stage_events = [
+        event for event in result.events if event["type"] == "stage.completed"
+    ]
+    assert [event["stage"] for event in stage_events] == [
+        "intent",
+        "execution",
+        "organization",
+    ]

backend/tests/unit/core/agent/test_session_title_strategy.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+from v1.agent.service import build_session_title
+
+
+def test_build_session_title_truncates_first_message() -> None:
+    now = datetime(2026, 2, 25, 10, 30)
+
+    title = build_session_title(
+        "这是一个非常长的标题会被截断到二十四个可见字符用于会话摘要", now=now
+    )
+
+    assert len(title) == 24
+
+
+def test_build_session_title_falls_back_when_message_empty() -> None:
+    now = datetime(2026, 2, 25, 10, 30)
+
+    title = build_session_title("\n  ", now=now)
+
+    assert title == "新对话 2026-02-25 10:30"

backend/tests/unit/core/agent/test_storage_adapter.py

@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+from core.agent.storage_adapter import StorageAdapter
+
+
+def test_build_object_path_uses_expected_pattern() -> None:
+    adapter = StorageAdapter(bucket="agent-chat-attachments")
+
+    path = adapter.build_object_path(
+        user_id="u1",
+        session_id="s1",
+        message_seq=3,
+        checksum_sha256="abc123",
+        extension="wav",
+    )
+
+    assert path == "agent-chat/u1/s1/3/abc123.wav"
+
+
+def test_build_attachment_metadata_contains_required_fields() -> None:
+    adapter = StorageAdapter(bucket="agent-chat-attachments")
+
+    metadata = adapter.build_attachment_metadata(
+        object_path="agent-chat/u1/s1/3/abc123.wav",
+        mime_type="audio/wav",
+        size=1024,
+        checksum_sha256="abc123",
+        origin="user_upload",
+        preview_text="hello",
+    )
+
+    assert metadata["object_path"] == "agent-chat/u1/s1/3/abc123.wav"
+    assert metadata["mime_type"] == "audio/wav"
+    assert metadata["size"] == 1024
+    assert metadata["checksum_sha256"] == "abc123"
+    assert metadata["origin"] == "user_upload"
+    assert metadata["preview_text"] == "hello"

backend/tests/unit/core/agent_chat/test_agui_adapter.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import pytest
 
-from core.agent_chat.agui_adapter import AguiAdapter
+from core.agent.agui_adapter import AguiAdapter
 
 
 def test_to_command_maps_payload_fields() -> None:

backend/tests/unit/core/agent_chat/test_asr_fun_asr_tool.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import pytest
 
-from core.agent_chat.tools.asr_fun_asr import FunASRTool
+from core.agent.tools.asr_fun_asr import FunASRTool
 
 
 def test_transcribe_uses_injected_dashscope_callable() -> None:

backend/tests/unit/core/agent_chat/test_cost_tracker.py

@@ -4,7 +4,7 @@ from decimal import Decimal
 
 import pytest
 
-from core.agent_chat.cost_tracker import CostTracker
+from core.agent.cost_tracker import CostTracker
 
 
 def test_normalize_usage_and_cost_aggregation() -> None:

backend/tests/unit/core/agent_chat/test_event_bridge.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import pytest
 
-from core.agent_chat.event_bridge import map_internal_event
+from core.agent.event_bridge import map_internal_event
 
 
 def test_map_run_started_event() -> None:

backend/tests/unit/core/agent_chat/test_multimodal.py

@@ -2,9 +2,9 @@ from __future__ import annotations
 
 import pytest
 
-from core.agent_chat.multimodal import AttachmentInput, MultimodalProcessor
+from core.agent.multimodal import AttachmentInput, MultimodalProcessor
-from core.agent_chat.storage_adapter import StorageAdapter
+from core.agent.storage_adapter import StorageAdapter
-from core.agent_chat.tools.asr_fun_asr import FunASRTool
+from core.agent.tools.asr_fun_asr import FunASRTool
 
 
 def test_multimodal_processes_audio_and_builds_attachment_context() -> None:

backend/tests/unit/core/agent_chat/test_orchestrator_pipeline.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from core.agent_chat.orchestrator import AgentChatOrchestrator
+from core.agent.orchestrator import AgentChatOrchestrator
 
 
 async def _intent_stage(

backend/tests/unit/core/agent_chat/test_session_title_strategy.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from datetime import datetime
 
-from v1.agent_chat.service import build_session_title
+from v1.agent.service import build_session_title
 
 
 def test_build_session_title_truncates_first_message() -> None:

backend/tests/unit/core/agent_chat/test_storage_adapter.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from core.agent_chat.storage_adapter import StorageAdapter
+from core.agent.storage_adapter import StorageAdapter
 
 
 def test_build_object_path_uses_expected_pattern() -> None:

backend/tests/unit/core/config/test_crewai_template_loader.py

@@ -4,7 +4,7 @@ from pathlib import Path
 
 import pytest
 
-from core.agent_chat.crewai.template_loader import (
+from core.agent.crewai.template_loader import (
     load_crewai_template,
     load_tools_whitelist,
     validate_workflow_stages,
@@ -63,7 +63,7 @@ tools:
 
 
 def test_load_crewai_template_success_when_all_files_valid(tmp_path: Path) -> None:
-    static_root = _prepare_static_root(tmp_path / "agent_chat")
+    static_root = _prepare_static_root(tmp_path / "agent")
 
     template = load_crewai_template(static_root)
 
@@ -79,7 +79,7 @@ def test_load_crewai_template_success_when_all_files_valid(tmp_path: Path) -> No
 def test_load_crewai_template_raises_file_not_found_when_required_file_missing(
     tmp_path: Path,
 ) -> None:
-    static_root = _prepare_static_root(tmp_path / "agent_chat")
+    static_root = _prepare_static_root(tmp_path / "agent")
     (static_root / "crewai" / "tasks.yaml").unlink()
 
     with pytest.raises(FileNotFoundError):
@@ -89,7 +89,7 @@ def test_load_crewai_template_raises_file_not_found_when_required_file_missing(
 def test_load_crewai_template_raises_value_error_when_workflow_stages_invalid(
     tmp_path: Path,
 ) -> None:
-    static_root = _prepare_static_root(tmp_path / "agent_chat")
+    static_root = _prepare_static_root(tmp_path / "agent")
     _write(
         static_root / "crewai" / "workflow.yaml",
         """
@@ -105,7 +105,7 @@ stages:
 
 
 def test_load_tools_whitelist_from_tools_yaml(tmp_path: Path) -> None:
-    static_root = _prepare_static_root(tmp_path / "agent_chat")
+    static_root = _prepare_static_root(tmp_path / "agent")
 
     whitelist = load_tools_whitelist(static_root)
 
@@ -124,7 +124,7 @@ def test_validate_workflow_stages_rejects_extra_or_missing_stage() -> None:
 
 
 def test_load_tools_whitelist_rejects_non_string_item(tmp_path: Path) -> None:
-    static_root = _prepare_static_root(tmp_path / "agent_chat")
+    static_root = _prepare_static_root(tmp_path / "agent")
     _write(
         static_root / "tools.yaml",
         """

backend/tests/unit/core/test_agent_init_data.py

@@ -19,7 +19,7 @@ def test_llm_catalog_file_exists_and_has_required_fields() -> None:
         / "core"
         / "config"
         / "static"
-        / "agent_chat"
+        / "agent"
         / "llm_catalog.yaml"
     )
 
@@ -28,7 +28,7 @@ def test_llm_catalog_file_exists_and_has_required_fields() -> None:
     assert len(catalog["factories"]) == 6
     assert len(catalog["llms"]) == 2
     assert set(catalog["factories"][0].keys()) == {"name", "request_url", "avatar"}
-    assert set(catalog["llms"][0].keys()) == {"model_code", "factory_id"}
+    assert set(catalog["llms"][0].keys()) == {"model_code", "factory_name"}
 
 
 def test_load_llm_catalog_raises_on_invalid_structure(tmp_path: Path) -> None:

backend/tests/unit/v1/agent_chat/test_service.py

@@ -10,12 +10,12 @@ from fastapi import HTTPException
 from sqlalchemy.exc import SQLAlchemyError
 
 from core.auth.models import CurrentUser
-from core.agent_chat.orchestrator import OrchestratorResult
+from core.agent.orchestrator import OrchestratorResult
 from core.db.base import Base
 from models.agent_chat_message import AgentChatMessage
 from models.agent_chat_session import AgentChatSession
-from v1.agent_chat.schemas import AgentChatRunRequest
+from v1.agent.schemas import AgentChatRunRequest
-from v1.agent_chat.service import AgentChatService
+from v1.agent.service import AgentChatService
 
 
 @pytest.fixture

docs/runtime/runtime-route.md

@@ -786,9 +786,9 @@
 
 ---
 
-## Agent Chat
+## Agent
 
-### POST /agent-chat
+### POST /agent
 
 运行 Agent 对话（需要认证）。
 

docs/runtime/runtime-runbook.md

@@ -166,12 +166,12 @@ PYTHONPATH=backend/src uv run pytest backend/tests/unit -k agent_chat -q
 PYTHONPATH=backend/src uv run pytest backend/tests/integration -k agent_chat -q
 PYTHONPATH=backend/src uv run pytest backend/tests/e2e/test_agent_chat_flow.py backend/tests/e2e/test_agent_chat_recent_session_home.py -q
 
-curl -sS -X POST "${WEB_BASE_URL}/api/v1/agent-chat" \
+curl -sS -X POST "${WEB_BASE_URL}/api/v1/agent" \
   -H 'Content-Type: application/json' \
   -d '{"message":"hello"}'
 ```
 
-通过标准：测试通过，`/api/v1/agent-chat/run` 返回有效 `session_id` 与事件序列。
+通过标准：测试通过，`/api/v1/agent` 返回有效 `session_id` 与事件序列。
 
 ---
 
@@ -197,7 +197,7 @@ curl -sS -X POST "${WEB_BASE_URL}/api/v1/agent-chat" \
 
 ### 4) Agent Chat 启动后异常
 
-- 症状：`/api/v1/agent-chat/run` 返回 5xx 或事件不完整。
+- 症状：`/api/v1/agent` 返回 5xx 或事件不完整。
 - 定位：先跑 L3 测试，再看 `logs/errors/web.error.log`。
 - 修复：先恢复到可用版本，再排查迁移、配置与依赖差异。