Enhance workflow routing and agent configuration management

- Introduce WorkflowLLMRouter for pre-response LLM routing, allowing agents to determine the appropriate function to call based on user input.
- Implement UserTurnRoutingProcessor to manage user turns before reaching the LLM, ensuring proper routing and handling of user messages.
- Refactor WorkflowBrain to integrate new routing logic and enhance agent stage configuration, including entry modes and resource management.
- Update service factory to support dynamic LLM resource configuration based on workflow settings.
- Add tests for new routing functionality and ensure proper handling of user messages in various scenarios.

backend/routes/assistants.py

@@ -48,14 +48,23 @@ async def _validate_workflow_references(
     settings = graph.get("settings") or {}
     resource_expectations: dict[str, str] = {}
     for key, capability in (
+        ("defaultLlmResourceId", "LLM"),
         ("defaultAsrResourceId", "ASR"),
         ("defaultTtsResourceId", "TTS"),
     ):
         if settings.get(key):
             resource_expectations[str(settings[key])] = capability
-    knowledge_ids: set[str] = set()
+    knowledge_ids: set[str] = (
+        {str(settings["knowledgeBaseId"])}
+        if settings.get("knowledgeBaseId")
+        else set()
+    )
     for node in graph.get("nodes") or []:
         data = node.get("data") or {}
+        if node.get("type") == "agent" and data.get("inheritGlobalConfig", True):
+            continue
+        if data.get("llmResourceId"):
+            resource_expectations[str(data["llmResourceId"])] = "LLM"
         if data.get("asrResourceId"):
             resource_expectations[str(data["asrResourceId"])] = "ASR"
         if data.get("ttsResourceId"):

backend/services/brains/base.py

@@ -55,7 +55,9 @@ class BrainRuntime:
     worker: Any = None
     context_aggregator: Any = None
     transport: Any = None
-    switch_services: Callable[[str | None, str | None], Awaitable[None]] | None = None
+    switch_services: (
+        Callable[[str | None, str | None, str | None], Awaitable[None]] | None
+    ) = None
     set_knowledge_scope: Callable[[dict[str, Any]], None] | None = None
     set_input_enabled: Callable[[bool], None] | None = None
     flow_global_functions: list[Any] = field(default_factory=list)
@@ -84,6 +86,15 @@ class BaseBrain:
     def record_user_message(self, content: str) -> None:
         """Observe a committed user message for brain-owned routing state."""
 
+    async def on_user_turn_end(self, content: str) -> bool:
+        """Handle a complete user turn before the conversational LLM runs.
+
+        Return True when the brain scheduled the next action itself and the
+        in-flight context frame must not reach the previous Agent's LLM.
+        """
+        self.record_user_message(content)
+        return False
+
     async def on_assistant_text_start(self, turn_id: str) -> None:
         """Observe the start of a generated assistant turn."""
 
@@ -114,6 +125,8 @@ class Brain(Protocol):
 
     def record_user_message(self, content: str) -> None: ...
 
+    async def on_user_turn_end(self, content: str) -> bool: ...
+
     async def on_assistant_text_start(self, turn_id: str) -> None: ...
 
     async def on_assistant_text_end(

backend/services/brains/workflow_brain.py

@@ -15,6 +15,7 @@ from pipecat.flows import (
     NodeConfig,
 )
 from pipecat.frames.frames import (
+    LLMRunFrame,
     LLMUpdateSettingsFrame,
     OutputTransportMessageUrgentFrame,
     TTSSpeakFrame,
@@ -22,18 +23,20 @@ from pipecat.frames.frames import (
 from pipecat.processors.aggregators.llm_context import LLMContext
 from pipecat.processors.frame_processor import FrameProcessor
 from pipecat.services.settings import LLMSettings
+from pipecat.utils.time import time_now_iso8601
 
 from services.brains.base import BaseBrain, BrainRuntime, BrainSpec
 from services.knowledge import search as search_knowledge
 from services.runtime_variables import DynamicVariableStore
 from services.tool_executor import ToolExecutionError, ToolExecutor
 from services.workflow_engine import WorkflowEngine
+from services.workflow_router import STAY_ON_CURRENT_AGENT, WorkflowLLMRouter
 
 
 MAX_AUTOMATIC_HOPS = 50
 AGENT_STAGE_INSTRUCTION = (
-    "完成当前阶段任务。需要流转时必须调用对应的转移函数；"
-    "不要在调用转移函数后继续生成口头回复。"
+    "工作流路由已在用户一轮输入结束时完成。只执行当前阶段任务，"
+    "不要自行解释、模拟或宣布节点切换。"
 )
 
 
@@ -58,6 +61,7 @@ class WorkflowBrain(BaseBrain):
         }
         self._runtime: BrainRuntime | None = None
         self._manager: FlowManager | None = None
+        self._router = WorkflowLLMRouter(cfg or AssistantConfig(type="workflow"))
         self._ended = False
 
     async def greeting(self, cfg: AssistantConfig) -> str:
@@ -79,6 +83,7 @@ class WorkflowBrain(BaseBrain):
         self._store = DynamicVariableStore.from_config(cfg)
         self._tools = ToolExecutor(self._store)
         self._tool_by_id = {tool.id: tool for tool in cfg.tools}
+        self._router = WorkflowLLMRouter(cfg)
         self._manager = FlowManager(
             worker=runtime.worker,
             llm=runtime.llm,
@@ -95,9 +100,13 @@ class WorkflowBrain(BaseBrain):
             self._store,
             include_default=True,
         )
-        if not edge:
+        if not edge and self._engine.has_outgoing(self._engine.start_id):
             raise RuntimeError("Start 初始化后没有命中的表达式边或默认边")
-        node_config = await self._follow_edge(edge)
+        node_config = (
+            await self._follow_edge(edge)
+            if edge
+            else self._passive_node_config(self._engine.start_id)
+        )
         if self._manager is None:
             raise RuntimeError("Workflow FlowManager 尚未初始化")
         await self._manager.initialize(node_config)
@@ -107,6 +116,76 @@ class WorkflowBrain(BaseBrain):
         if content and not self._ended:
             self._store.record("user", content)
 
+    async def on_user_turn_end(self, content: str) -> bool:
+        """Route a complete user turn before any Agent is allowed to reply."""
+        if not content or self._ended:
+            return True
+        self.record_user_message(content)
+        manager = self._require_manager()
+        current = manager.current_node
+        if not current or self._engine.node_type(current) != "agent":
+            return True
+
+        edge = self._engine.deterministic_edge(
+            current,
+            self._store,
+            include_default=False,
+        )
+        outgoing = self._engine.outgoing(current)
+        llm_edges = [
+            candidate
+            for candidate in outgoing
+            if self._engine.edge_mode(candidate) == "llm"
+        ]
+        default_edge = next(
+            (
+                candidate
+                for candidate in outgoing
+                if self._engine.edge_mode(candidate) == "always"
+            ),
+            None,
+        )
+
+        if edge is None and llm_edges:
+            selected = await self._router_for_node(current).select_edge(
+                node_name=self._engine.name(current),
+                node_prompt=self._engine.prompt_for(current, self._store),
+                edges=llm_edges,
+                history=self._store.history,
+                variables={
+                    key: value
+                    for key, value in self._store.values.items()
+                    if not key.startswith("system__")
+                },
+                edge_name=self._engine.edge_fn_name,
+                edge_description=self._engine.edge_description,
+            )
+            if selected and selected != STAY_ON_CURRENT_AGENT:
+                edge = next(
+                    (
+                        candidate
+                        for candidate in llm_edges
+                        if self._engine.edge_fn_name(candidate) == selected
+                    ),
+                    None,
+                )
+            elif selected == STAY_ON_CURRENT_AGENT:
+                edge = default_edge
+        elif edge is None and not llm_edges:
+            edge = default_edge
+
+        if edge and manager.current_node == current:
+            next_config = await self._follow_edge(edge)
+            await manager.set_node_from_config(next_config)
+            return True
+
+        # The incoming LLMContextFrame is intentionally suppressed by the
+        # pipeline router. Queue prompt refresh + inference in this order so
+        # this user turn is answered with the current Agent's latest variables.
+        await self._refresh_agent_prompt(current)
+        await self._require_runtime().queue_frame(LLMRunFrame())
+        return True
+
     async def on_assistant_text_end(
         self,
         _turn_id: str,
@@ -116,19 +195,6 @@ class WorkflowBrain(BaseBrain):
         if not content or interrupted or self._ended:
             return
         self._store.record("agent", content, completed_agent_turn=True)
-        manager = self._require_manager()
-        current = manager.current_node
-        if not current or self._engine.node_type(current) != "agent":
-            return
-        await self._refresh_agent_prompt(current)
-        edge = self._engine.deterministic_edge(
-            current,
-            self._store,
-            include_default=False,
-        )
-        if edge and manager.current_node == current:
-            next_config = await self._follow_edge(edge)
-            await manager.set_node_from_config(next_config)
 
     async def _refresh_agent_prompt(self, node_id: str) -> None:
         runtime = self._require_runtime()
@@ -145,61 +211,104 @@ class WorkflowBrain(BaseBrain):
         stage_prompt = self._engine.prompt_for(node_id, self._store)
         return f"{stage_prompt}\n\n[工作流执行规则]\n{AGENT_STAGE_INSTRUCTION}"
 
+    def _router_for_node(self, node_id: str) -> WorkflowLLMRouter:
+        stage = self._engine.agent_stage_config(node_id)
+        resource_id = stage.llm_resource_id
+        cfg = self._cfg
+        resource = cfg.workflow_model_resources.get(resource_id) if cfg else None
+        if not cfg or not resource:
+            return self._router
+        from services.pipecat.service_factory import config_with_resource
+
+        return WorkflowLLMRouter(config_with_resource(cfg, resource))
+
     async def _apply_agent_stage(self, node_id: str) -> None:
-        data = self._engine.data(node_id)
+        stage = self._engine.agent_stage_config(node_id)
         await self._emit_node_active(node_id)
         if self._runtime and self._runtime.set_input_enabled:
             self._runtime.set_input_enabled(True)
-        asr_id = str(
-            data.get("asrResourceId")
-            or self._engine.settings.get("defaultAsrResourceId")
-            or ""
-        )
-        tts_id = str(
-            data.get("ttsResourceId")
-            or self._engine.settings.get("defaultTtsResourceId")
-            or ""
-        )
         runtime = self._require_runtime()
         if runtime.switch_services:
-            await runtime.switch_services(asr_id or None, tts_id or None)
+            await runtime.switch_services(
+                stage.llm_resource_id or None,
+                stage.asr_resource_id or None,
+                stage.tts_resource_id or None,
+            )
         if runtime.set_knowledge_scope:
             runtime.set_knowledge_scope(
                 {
-                    "knowledge_base_id": data.get("knowledgeBaseId"),
-                    "mode": data.get("knowledgeMode", "disabled"),
-                    "top_n": int(data.get("knowledgeTopN") or 5),
-                    "score_threshold": float(data.get("knowledgeScoreThreshold") or 0.0),
+                    "knowledge_base_id": stage.knowledge_base_id,
+                    "mode": stage.knowledge_mode,
+                    "top_n": stage.knowledge_top_n,
+                    "score_threshold": stage.knowledge_score_threshold,
                 }
             )
 
     def _agent_config(self, node_id: str) -> NodeConfig:
         data = self._engine.data(node_id)
+        entry_mode = str(data.get("entryMode") or "wait_user")
+        entry_speech = self._store.render(str(data.get("entrySpeech") or ""))
         strategy = (
             ContextStrategy.RESET
             if data.get("contextPolicy") == "fresh"
             else ContextStrategy.APPEND
         )
+        stage = self._engine.agent_stage_config(node_id)
         functions: list[FlowsFunctionSchema] = []
-        for tool_id in data.get("toolIds") or []:
+        for tool_id in stage.tool_ids:
             tool = self._tool_by_id.get(str(tool_id))
             if tool and tool.type == "http":
                 functions.append(self._flow_tool(tool, node_id))
         knowledge_function = self._knowledge_function(node_id)
         if knowledge_function:
             functions.append(knowledge_function)
-        for edge in self._engine.llm_edges(node_id):
-            functions.append(self._flow_edge(edge))
-        return {
+        config: NodeConfig = {
             "name": node_id,
             "role_message": self._agent_role_message(node_id),
-            "task_messages": [],
+            "task_messages": (
+                [{"role": "assistant", "content": entry_speech}]
+                if entry_mode == "fixed_speech"
+                else []
+            ),
             "functions": functions,
             "context_strategy": ContextStrategyConfig(strategy=strategy),
-            "respond_immediately": True,
+            "respond_immediately": entry_mode == "generate",
         }
+        if entry_mode == "fixed_speech":
+            config["pre_actions"] = [
+                {
+                    "type": "workflow_fixed_speech",
+                    "text": entry_speech,
+                    "handler": self._play_fixed_speech,
+                }
+            ]
+        return config
 
-    def _terminal_config(self, node_id: str) -> NodeConfig:
+    async def _play_fixed_speech(self, action: dict, _flow_manager: FlowManager) -> None:
+        """Play and persist Agent entry speech without creating an LLM turn."""
+        await self._queue_visible_speech(str(action.get("text") or ""))
+
+    async def _queue_visible_speech(self, text: str) -> None:
+        """Show and persist fixed workflow speech before sending it to TTS."""
+        content = text.strip()
+        if not content:
+            return
+        self._store.record("agent", content)
+        runtime = self._require_runtime()
+        await runtime.queue_frame(
+            OutputTransportMessageUrgentFrame(
+                message={
+                    "type": "transcript",
+                    "role": "assistant",
+                    "content": content,
+                    "timestamp": time_now_iso8601(),
+                }
+            )
+        )
+        await runtime.queue_frame(TTSSpeakFrame(content, append_to_context=False))
+
+    def _passive_node_config(self, node_id: str) -> NodeConfig:
+        """Keep a non-conversational terminal node active without ending the call."""
         return {
             "name": node_id,
             "role_message": self._store.render(self._engine.global_prompt()),
@@ -235,24 +344,13 @@ class WorkflowBrain(BaseBrain):
             properties=properties,
             required=required,
             handler=handler,
-        )
-
-    def _flow_edge(self, edge: dict) -> FlowsFunctionSchema:
-        async def handler(_args, _flow_manager):
-            return None, await self._follow_edge(edge)
-
-        return FlowsFunctionSchema(
-            name=self._engine.edge_fn_name(edge),
-            description=self._engine.edge_description(edge),
-            properties={},
-            required=[],
-            handler=handler,
+            cancel_on_interruption=True,
         )
 
     def _knowledge_function(self, node_id: str) -> FlowsFunctionSchema | None:
-        data = self._engine.data(node_id)
-        knowledge_id = str(data.get("knowledgeBaseId") or "")
-        if not knowledge_id or data.get("knowledgeMode") != "on_demand":
+        stage = self._engine.agent_stage_config(node_id)
+        knowledge_id = str(stage.knowledge_base_id or "")
+        if not knowledge_id or stage.knowledge_mode != "on_demand":
             return None
         cfg = self._cfg or AssistantConfig(type="workflow")
         knowledge = cfg.workflow_knowledge_bases.get(knowledge_id)
@@ -270,8 +368,8 @@ class WorkflowBrain(BaseBrain):
                         session,
                         knowledge_id,
                         query,
-                        top_k=int(data.get("knowledgeTopN") or 5),
-                        score_threshold=float(data.get("knowledgeScoreThreshold") or 0.0),
+                        top_k=stage.knowledge_top_n,
+                        score_threshold=stage.knowledge_score_threshold,
                     )
                 return {"status": "ok", "results": results}
             except Exception as exc:  # noqa: BLE001 - tool errors are returned to the LLM
@@ -286,14 +384,13 @@ class WorkflowBrain(BaseBrain):
             },
             required=["query"],
             handler=handler,
+            cancel_on_interruption=True,
         )
 
     async def _follow_edge(self, edge: dict) -> NodeConfig:
         speech = self._engine.edge_transition_speech(edge)
         if speech:
-            await self._require_runtime().queue_frame(
-                TTSSpeakFrame(self._store.render(speech), append_to_context=False)
-            )
+            await self._queue_visible_speech(self._store.render(speech))
         return await self._resolve_path(str(edge.get("target") or ""))
 
     async def _resolve_path(self, node_id: str) -> NodeConfig:
@@ -304,7 +401,7 @@ class WorkflowBrain(BaseBrain):
                 return self._agent_config(node_id)
             if node_type == "end":
                 await self._enter_end(node_id)
-                return self._terminal_config(node_id)
+                return self._passive_node_config(node_id)
             if node_type == "action":
                 await self._enter_action(node_id)
             elif node_type == "handoff":
@@ -313,6 +410,8 @@ class WorkflowBrain(BaseBrain):
                 await self._emit_node_active(node_id)
             else:
                 raise RuntimeError(f"工作流指向未知节点:{node_id}")
+            if not self._engine.has_outgoing(node_id):
+                return self._passive_node_config(node_id)
             edge = self._engine.deterministic_edge(
                 node_id,
                 self._store,
@@ -322,9 +421,7 @@ class WorkflowBrain(BaseBrain):
                 raise RuntimeError(f"自动节点 {node_id} 没有命中的表达式边或默认边")
             speech = self._engine.edge_transition_speech(edge)
             if speech:
-                await self._require_runtime().queue_frame(
-                    TTSSpeakFrame(self._store.render(speech), append_to_context=False)
-                )
+                await self._queue_visible_speech(self._store.render(speech))
             node_id = str(edge.get("target") or "")
         raise RuntimeError("工作流连续自动跳转超过安全上限")
 
@@ -366,9 +463,7 @@ class WorkflowBrain(BaseBrain):
             )
         )
         if message:
-            await self._require_runtime().queue_frame(
-                TTSSpeakFrame(message, append_to_context=False)
-            )
+            await self._queue_visible_speech(message)
         self._store.values["system__handoff_status"] = "requested"
 
     async def _enter_end(self, node_id: str) -> None:
@@ -389,12 +484,12 @@ class WorkflowBrain(BaseBrain):
                 )
             )
             if message:
-                await runtime.queue_frame(TTSSpeakFrame(message, append_to_context=False))
+                await self._queue_visible_speech(message)
             return
         runtime.call_end.begin("workflow_completed")
         if message:
             runtime.call_end.arm_after_speech()
-            await runtime.queue_frame(TTSSpeakFrame(message, append_to_context=False))
+            await self._queue_visible_speech(message)
         else:
             await runtime.call_end.finish()
 

backend/services/node_specs.py

@@ -10,6 +10,8 @@ from typing import Any
 SPEC_VERSION = "3"
 NODE_TYPES = {"start", "agent", "action", "handoff", "end"}
 EDGE_MODES = {"llm", "expression", "always"}
+AGENT_ENTRY_MODES = {"wait_user", "generate", "fixed_speech"}
+AUTOMATIC_NODE_TYPES = {"start", "action", "handoff"}
 EXPRESSION_OPERATORS = {
     "eq",
     "neq",
@@ -34,7 +36,7 @@ NODE_SPECS: list[dict[str, Any]] = [
         "constraints": {
             "minIncoming": 0,
             "maxIncoming": 0,
-            "minOutgoing": 1,
+            "minOutgoing": 0,
             "minInstances": 1,
             "maxInstances": 1,
         },
@@ -51,7 +53,7 @@ NODE_SPECS: list[dict[str, Any]] = [
         "icon": "Bot",
         "accent": "sky",
         "addable": True,
-        "constraints": {"minIncoming": 1, "minOutgoing": 1},
+        "constraints": {"minIncoming": 1, "minOutgoing": 0},
         "fields": [
             {"key": "name", "label": "节点名称", "type": "text", "default": "Agent"},
             {
@@ -84,7 +86,7 @@ NODE_SPECS: list[dict[str, Any]] = [
         "icon": "PhoneForwarded",
         "accent": "lavender",
         "addable": True,
-        "constraints": {"minIncoming": 1, "minOutgoing": 1},
+        "constraints": {"minIncoming": 1, "minOutgoing": 0},
         "fields": [
             {"key": "name", "label": "节点名称", "type": "text", "default": "Handoff"},
             {"key": "target", "label": "转交目标", "type": "text", "default": ""},
@@ -132,13 +134,49 @@ def _edge_data_v3(edge: dict, source_type: str) -> dict:
     return data
 
 
+def _normalize_agent_data(data: dict[str, Any]) -> None:
+    """Add v3 Agent defaults without changing existing node-level behavior."""
+    data.setdefault("contextPolicy", "inherit")
+    data.setdefault("entryMode", "wait_user")
+    data.setdefault("entrySpeech", "")
+    if "inheritGlobalConfig" not in data:
+        has_node_overrides = any(
+            (
+                data.get("llmResourceId"),
+                data.get("asrResourceId"),
+                data.get("ttsResourceId"),
+                data.get("knowledgeBaseId"),
+                data.get("toolIds"),
+            )
+        )
+        data["inheritGlobalConfig"] = not has_node_overrides
+
+
+def _normalize_settings(settings: dict[str, Any], *, global_prompt: str = "") -> None:
+    settings.setdefault("globalPrompt", global_prompt)
+    settings.setdefault("defaultLlmResourceId", "")
+    settings.setdefault("defaultAsrResourceId", "")
+    settings.setdefault("defaultTtsResourceId", "")
+    settings.setdefault("toolIds", [])
+    settings.setdefault("knowledgeBaseId", "")
+    settings.setdefault("knowledgeMode", "automatic")
+    settings.setdefault("knowledgeTopN", 5)
+    settings.setdefault("knowledgeScoreThreshold", 0.0)
+
+
 def normalize_graph(graph: dict[str, Any] | None) -> dict[str, Any]:
     """Return a deep-copied v3 graph; preserve v3 IDs and migrate v2 semantics."""
     source = deepcopy(graph or {})
     if str(source.get("specVersion") or "") == SPEC_VERSION:
-        source.setdefault("settings", {})
+        settings = source.setdefault("settings", {})
+        _normalize_settings(settings)
         source.setdefault("nodes", [])
         source.setdefault("edges", [])
+        for node in source["nodes"]:
+            if node.get("type") != "agent":
+                continue
+            data = node.setdefault("data", {})
+            _normalize_agent_data(data)
         return source
 
     nodes = source.get("nodes") or []
@@ -171,9 +209,7 @@ def normalize_graph(graph: dict[str, Any] | None) -> dict[str, Any]:
             data["message"] = data.pop("message", data.pop("prompt", ""))
             data.setdefault("scope", "session")
         elif new_type == "agent":
-            data.setdefault("contextPolicy", "inherit")
-            data.setdefault("toolIds", [])
-            data.setdefault("knowledgeMode", "disabled")
+            _normalize_agent_data(data)
         elif new_type == "start":
             prompt = str(data.pop("prompt", "") or "").strip()
             if prompt:
@@ -207,8 +243,9 @@ def normalize_graph(graph: dict[str, Any] | None) -> dict[str, Any]:
                     "name": "迁移的开场 Agent",
                     "prompt": prompt,
                     "contextPolicy": "inherit",
-                    "toolIds": [],
-                    "knowledgeMode": "disabled",
+                    "inheritGlobalConfig": True,
+                    "entryMode": "wait_user",
+                    "entrySpeech": "",
                 },
             }
         )
@@ -228,9 +265,7 @@ def normalize_graph(graph: dict[str, Any] | None) -> dict[str, Any]:
         )
 
     settings = deepcopy(source.get("settings") or {})
-    settings.setdefault("globalPrompt", global_prompt)
-    settings.setdefault("defaultAsrResourceId", "")
-    settings.setdefault("defaultTtsResourceId", "")
+    _normalize_settings(settings, global_prompt=global_prompt)
     return {
         "specVersion": 3,
         "settings": settings,
@@ -281,11 +316,18 @@ def validate_graph(graph: dict[str, Any]) -> list[str]:
         node_by_id[node_id] = node
         counts[node_type] += 1
 
+        if node_type == "agent":
+            data = node.get("data") or {}
+            entry_mode = data.get("entryMode", "wait_user")
+            if entry_mode not in AGENT_ENTRY_MODES:
+                errors.append(f"Agent 节点 {node_id} 的进入模式无效:{entry_mode}")
+            elif entry_mode == "fixed_speech" and not str(
+                data.get("entrySpeech") or ""
+            ).strip():
+                errors.append(f"Agent 节点 {node_id} 的固定进入语不能为空")
+
     if counts["start"] != 1:
         errors.append("工作流必须有且仅有一个 Start 节点")
-    if counts["end"] < 1:
-        errors.append("工作流至少需要一个 End 节点")
-
     incoming: dict[str, int] = defaultdict(int)
     outgoing: dict[str, int] = defaultdict(int)
     adj: dict[str, list[str]] = defaultdict(list)
@@ -313,7 +355,8 @@ def validate_graph(graph: dict[str, Any]) -> list[str]:
         if mode == "llm" and not str(data.get("condition") or "").strip():
             errors.append(f"LLM 判断边缺少自然语言条件:{edge_id}")
         if mode == "expression":
-            errors.extend(f"边 {edge_id}:{item}" for item in _validate_expression(data.get("expression")))
+            expression_errors = _validate_expression(data.get("expression"))
+            errors.extend(f"边 {edge_id}:{item}" for item in expression_errors)
         try:
             priority = int(data.get("priority", 10))
         except (TypeError, ValueError):
@@ -329,7 +372,9 @@ def validate_graph(graph: dict[str, Any]) -> list[str]:
         incoming[target_id] += 1
         outgoing[source_id] += 1
         adj[source_id].append(target_id)
-        if node_by_id[source_id].get("type") != "agent" and node_by_id[target_id].get("type") != "agent":
+        source_is_automatic = node_by_id[source_id].get("type") != "agent"
+        target_is_automatic = node_by_id[target_id].get("type") != "agent"
+        if source_is_automatic and target_is_automatic:
             auto_adj[source_id].append(target_id)
 
     for node_id, node in node_by_id.items():
@@ -347,10 +392,18 @@ def validate_graph(graph: dict[str, Any]) -> list[str]:
                 errors.append(f"节点 {node_id} 的{label}不能少于 {lo}")
             if hi is not None and actual > hi:
                 errors.append(f"节点 {node_id} 的{label}不能多于 {hi}")
-        if node.get("type") in {"start", "action", "handoff"} and always_counts[node_id] != 1:
-            errors.append(f"自动节点 {node_id} 必须有且仅有一条默认边")
+        node_type = node.get("type")
+        if (
+            node_type in AUTOMATIC_NODE_TYPES
+            and outgoing[node_id] > 0
+            and always_counts[node_id] != 1
+        ):
+            errors.append(f"自动节点 {node_id} 存在出边时必须有且仅有一条默认边")
 
-    start_id = next((nid for nid, n in node_by_id.items() if n.get("type") == "start"), None)
+    start_id = next(
+        (node_id for node_id, node in node_by_id.items() if node.get("type") == "start"),
+        None,
+    )
     if start_id:
         reached = {start_id}
         queue = deque([start_id])
@@ -380,7 +433,12 @@ def validate_graph(graph: dict[str, Any]) -> list[str]:
         visited.add(node_id)
         return False
 
-    if any(visit(node_id) for node_id, node in node_by_id.items() if node.get("type") != "agent"):
+    automatic_node_ids = (
+        node_id
+        for node_id, node in node_by_id.items()
+        if node.get("type") != "agent"
+    )
+    if any(visit(node_id) for node_id in automatic_node_ids):
         errors.append("Start/Action/Handoff/End 之间不能形成无等待循环")
     return list(dict.fromkeys(errors))
 
@@ -392,22 +450,35 @@ def graph_references(graph: dict[str, Any]) -> dict[str, set[str]]:
     resources = {
         str(value)
         for value in (
+            settings.get("defaultLlmResourceId"),
             settings.get("defaultAsrResourceId"),
             settings.get("defaultTtsResourceId"),
         )
         if value
     }
-    tools: set[str] = set()
-    knowledge: set[str] = set()
+    tools: set[str] = {str(tool_id) for tool_id in settings.get("toolIds") or []}
+    knowledge: set[str] = (
+        {str(settings["knowledgeBaseId"])}
+        if settings.get("knowledgeBaseId")
+        else set()
+    )
     for node in normalized.get("nodes") or []:
         data = node.get("data") or {}
-        for resource_id in (data.get("asrResourceId"), data.get("ttsResourceId")):
-            if resource_id:
-                resources.add(str(resource_id))
-        for tool_id in data.get("toolIds") or []:
-            tools.add(str(tool_id))
+        inherits_global = (
+            node.get("type") == "agent" and data.get("inheritGlobalConfig", True)
+        )
+        if not inherits_global:
+            for resource_id in (
+                data.get("llmResourceId"),
+                data.get("asrResourceId"),
+                data.get("ttsResourceId"),
+            ):
+                if resource_id:
+                    resources.add(str(resource_id))
+            for tool_id in data.get("toolIds") or []:
+                tools.add(str(tool_id))
+            if data.get("knowledgeBaseId"):
+                knowledge.add(str(data["knowledgeBaseId"]))
         if data.get("toolId"):
             tools.add(str(data["toolId"]))
-        if data.get("knowledgeBaseId"):
-            knowledge.add(str(data["knowledgeBaseId"]))
     return {"model_resources": resources, "tools": tools, "knowledge_bases": knowledge}

backend/services/pipecat/pipeline.py

@@ -24,6 +24,7 @@ from services.pipecat.call_lifecycle import (
 )
 from services.pipecat.service_factory import (
     config_with_resource,
+    create_llm,
     create_realtime_service,
     create_stt,
     create_tts,
@@ -51,6 +52,7 @@ from pipecat.frames.frames import (
     UserImageRequestFrame,
 )
 from pipecat.pipeline.pipeline import Pipeline
+from pipecat.pipeline.llm_switcher import LLMSwitcher
 from pipecat.pipeline.service_switcher import ServiceSwitcher
 from pipecat.pipeline.worker import PipelineParams, PipelineWorker
 from pipecat.processors.aggregators.llm_context import LLMContext
@@ -487,6 +489,49 @@ class KnowledgeRetrievalProcessor(FrameProcessor):
         await self.push_frame(frame, direction)
 
 
+class UserTurnRoutingProcessor(FrameProcessor):
+    """Give a brain first right of refusal before a new user turn reaches the LLM."""
+
+    def __init__(self, brain: Brain):
+        super().__init__()
+        self._brain = brain
+        self._last_user_message: dict | None = None
+
+    async def process_frame(self, frame, direction: FrameDirection):
+        await super().process_frame(frame, direction)
+        if direction != FrameDirection.DOWNSTREAM or not isinstance(
+            frame, LLMContextFrame
+        ):
+            await self.push_frame(frame, direction)
+            return
+
+        user_message = next(
+            (
+                message
+                for message in reversed(frame.context.get_messages())
+                if message.get("role") == "user"
+                and isinstance(message.get("content"), str)
+                and str(message.get("content") or "").strip()
+            ),
+            None,
+        )
+        if user_message is None:
+            await self.push_frame(frame, direction)
+            return
+
+        if user_message is self._last_user_message:
+            # Programmatic LLMRunFrame after a node transition reuses the same
+            # user message. It is a response run, not another routing event.
+            await self.push_frame(frame, direction)
+            return
+        self._last_user_message = user_message
+
+        content = str(user_message.get("content") or "").strip()
+        handled = await self._brain.on_user_turn_end(content)
+        if not handled:
+            await self.push_frame(frame, direction)
+
+
 class PassthroughLLMAssistantAggregator(LLMAssistantAggregator):
     """聚合 LLM 回复进上下文,同时继续把回复帧交给下游 TTS。"""
 
@@ -589,6 +634,29 @@ def _workflow_service_switcher(
     return ServiceSwitcher(services=services), services_by_id, primary
 
 
+def _workflow_llm_switcher(cfg: AssistantConfig, base_service):
+    """Build an LLM switcher for the global model and Agent overrides."""
+    settings = cfg.graph.get("settings") or {}
+    default_id = str(settings.get("defaultLlmResourceId") or "")
+    services_by_id = {}
+    for resource_id, resource in cfg.workflow_model_resources.items():
+        if resource.capability != "LLM":
+            continue
+        services_by_id[resource_id] = (
+            base_service
+            if resource_id == default_id
+            else create_llm(config_with_resource(cfg, resource))
+        )
+    primary = services_by_id.get(default_id, base_service)
+    services = [primary]
+    services.extend(
+        service for service in services_by_id.values() if service is not primary
+    )
+    if base_service is not primary:
+        services.append(base_service)
+    return LLMSwitcher(llms=services), services_by_id, primary
+
+
 async def run_pipeline(
     transport,
     cfg: AssistantConfig,
@@ -630,6 +698,9 @@ async def run_pipeline(
         return
 
     graph_settings = cfg.graph.get("settings") or {}
+    default_llm_resource = cfg.workflow_model_resources.get(
+        str(graph_settings.get("defaultLlmResourceId") or "")
+    )
     default_asr_resource = cfg.workflow_model_resources.get(
         str(graph_settings.get("defaultAsrResourceId") or "")
     )
@@ -713,7 +784,16 @@ async def run_pipeline(
     )
     input_state = {"enabled": True}
     # LLM 槽由大脑提供:本地模型或 Dify/FastGPT 外部托管适配器。
-    llm = brain.build_llm(cfg, context)
+    llm = brain.build_llm(
+        config_with_resource(cfg, default_llm_resource)
+        if cfg.type == "workflow" and default_llm_resource
+        else cfg,
+        context,
+    )
+    llm_services: dict[str, FrameProcessor] = {}
+    current_llm_service = llm
+    if cfg.type == "workflow":
+        llm, llm_services, current_llm_service = _workflow_llm_switcher(cfg, llm)
     user_aggregator = LLMUserAggregator(
         context,
         params=LLMUserAggregatorParams(
@@ -730,6 +810,7 @@ async def run_pipeline(
             ),
         ),
     )
+    user_turn_router = UserTurnRoutingProcessor(brain)
     assistant_aggregator = PassthroughLLMAssistantAggregator(context)
     text_input = TextInputProcessor(
         should_ignore_input=lambda: call_end.ending or not input_state["enabled"]
@@ -880,6 +961,7 @@ async def run_pipeline(
                 properties=vision_schema.properties,
                 required=vision_schema.required,
                 handler=flow_fetch_user_image,
+                cancel_on_interruption=True,
             )
         )
 
@@ -913,6 +995,7 @@ async def run_pipeline(
             text_input,
             stt_processor,
             user_aggregator,
+            user_turn_router,
             knowledge_retrieval,
             llm,
             # Aggregate the streamed LLM text before TTS. On interruption,
@@ -934,24 +1017,42 @@ async def run_pipeline(
         enable_rtvi=False,
     )
     worker_holder["worker"] = worker
-    default_voice_services = dict(current_voice_services)
+    default_workflow_services = {
+        "llm": current_llm_service,
+        **current_voice_services,
+    }
 
     async def switch_workflow_services(
+        llm_resource_id: str | None,
         asr_resource_id: str | None,
         tts_resource_id: str | None,
     ) -> None:
+        nonlocal current_llm_service
         requested = (
+            ("llm", llm_services, llm_resource_id),
             ("asr", stt_services, asr_resource_id),
             ("tts", tts_services, tts_resource_id),
         )
         for kind, services, resource_id in requested:
-            target = services.get(resource_id) if resource_id else default_voice_services[kind]
+            target = (
+                services.get(resource_id)
+                if resource_id
+                else default_workflow_services[kind]
+            )
             if target is None:
                 raise ValueError(f"Workflow {kind.upper()} 资源未加载:{resource_id}")
-            if current_voice_services[kind] is target:
+            current = (
+                current_llm_service
+                if kind == "llm"
+                else current_voice_services[kind]
+            )
+            if current is target:
                 continue
             await worker.queue_frame(ManuallySwitchServiceFrame(service=target))
-            current_voice_services[kind] = target
+            if kind == "llm":
+                current_llm_service = target
+            else:
+                current_voice_services[kind] = target
             await worker.queue_frame(
                 OutputTransportMessageUrgentFrame(
                     message={
@@ -1020,8 +1121,6 @@ async def run_pipeline(
 
     @user_aggregator.event_handler("on_user_turn_stopped")
     async def on_user_turn_stopped(_aggregator, _strategy, message):
-        if message.content:
-            brain.record_user_message(message.content)
         await queue_transcript("user", message.content, message.timestamp)
 
     @assistant_aggregator.event_handler("on_assistant_text_start")
@@ -1066,7 +1165,6 @@ async def run_pipeline(
     @text_input.event_handler("on_text_input")
     async def on_text_input(_processor, text):
         pending_text_inputs.append(text)
-        brain.record_user_message(text)
         # 前端显示不依赖 interruption 后续事件,必须在打断前先排入发送队列。
         await queue_transcript("user", text, time_now_iso8601())
 

backend/services/pipecat/service_factory.py

@@ -29,11 +29,18 @@ TTS_STOP_FRAME_TIMEOUT_S = 1.0
 def config_with_resource(
     cfg: AssistantConfig, resource: RuntimeModelResource
 ) -> AssistantConfig:
-    """Return a call-local config view for one workflow ASR/TTS resource."""
+    """Return a call-local config view for one workflow model resource."""
     result = cfg.model_copy(deep=True)
     values = resource.values or {}
     secrets = resource.secrets or {}
-    if resource.capability == "ASR":
+    if resource.capability == "LLM":
+        result.model = str(values.get("modelId") or "")
+        result.llm_interface_type = resource.interface_type
+        result.llm_values = values
+        result.llm_secrets = secrets
+        result.llm_api_key = str(secrets.get("apiKey") or "")
+        result.llm_base_url = str(values.get("apiUrl") or "")
+    elif resource.capability == "ASR":
         result.asr = str(values.get("modelId") or "")
         result.stt_language = str(values.get("language") or "")
         result.stt_interface_type = resource.interface_type
@@ -51,7 +58,7 @@ def config_with_resource(
         result.tts_api_key = str(secrets.get("apiKey") or "")
         result.tts_base_url = str(values.get("apiUrl") or "")
     else:
-        raise ValueError(f"工作流语音资源能力无效:{resource.capability}")
+        raise ValueError(f"工作流模型资源能力无效:{resource.capability}")
     return result
 
 

backend/services/workflow_engine.py

@@ -3,12 +3,28 @@
 from __future__ import annotations
 
 import re
+from dataclasses import dataclass
 from typing import Any
 
 from services.node_specs import normalize_graph
 from services.runtime_variables import DynamicVariableStore
 
 
+@dataclass(frozen=True)
+class AgentStageConfig:
+    """The complete assistant configuration active inside one Agent node."""
+
+    inherits_global: bool
+    llm_resource_id: str
+    asr_resource_id: str
+    tts_resource_id: str
+    tool_ids: tuple[str, ...]
+    knowledge_base_id: str | None
+    knowledge_mode: str
+    knowledge_top_n: int
+    knowledge_score_threshold: float
+
+
 class WorkflowEngine:
     def __init__(self, graph: dict[str, Any]):
         self.graph = normalize_graph(graph)
@@ -20,7 +36,11 @@ class WorkflowEngine:
         }
         self.edges: list[dict] = list(self.graph.get("edges") or [])
         self.start_id = next(
-            (node_id for node_id, node in self.nodes.items() if node.get("type") == "start"),
+            (
+                node_id
+                for node_id, node in self.nodes.items()
+                if node.get("type") == "start"
+            ),
             None,
         )
 
@@ -38,7 +58,13 @@ class WorkflowEngine:
 
     def outgoing(self, node_id: str | None) -> list[dict]:
         result = [edge for edge in self.edges if edge.get("source") == node_id]
-        return sorted(result, key=lambda edge: int((edge.get("data") or {}).get("priority", 10)))
+        return sorted(
+            result,
+            key=lambda edge: int((edge.get("data") or {}).get("priority", 10)),
+        )
+
+    def has_outgoing(self, node_id: str | None) -> bool:
+        return any(edge.get("source") == node_id for edge in self.edges)
 
     def edge_mode(self, edge: dict) -> str:
         return str((edge.get("data") or {}).get("mode") or "always")
@@ -60,15 +86,49 @@ class WorkflowEngine:
         if not edge:
             return ""
         data = edge.get("data") or {}
-        return str(data.get("transitionSpeech") or data.get("transition_speech") or "")
+        return str(
+            data.get("transitionSpeech") or data.get("transition_speech") or ""
+        )
 
     def global_prompt(self) -> str:
         return str(self.settings.get("globalPrompt") or "").strip()
 
+    def inherits_global_config(self, node_id: str) -> bool:
+        """Return the Agent's explicit configuration scope, defaulting to global."""
+        return bool(self.data(node_id).get("inheritGlobalConfig", True))
+
+    def agent_stage_config(self, node_id: str) -> AgentStageConfig:
+        """Resolve either Workflow defaults or one Agent's complete override."""
+        data = self.data(node_id)
+        inherits_global = self.inherits_global_config(node_id)
+        source = self.settings if inherits_global else data
+        llm_key = "defaultLlmResourceId" if inherits_global else "llmResourceId"
+        asr_key = "defaultAsrResourceId" if inherits_global else "asrResourceId"
+        tts_key = "defaultTtsResourceId" if inherits_global else "ttsResourceId"
+        knowledge_base_id = str(source.get("knowledgeBaseId") or "")
+        return AgentStageConfig(
+            inherits_global=inherits_global,
+            llm_resource_id=str(source.get(llm_key) or ""),
+            asr_resource_id=str(source.get(asr_key) or ""),
+            tts_resource_id=str(source.get(tts_key) or ""),
+            tool_ids=tuple(str(tool_id) for tool_id in source.get("toolIds") or []),
+            knowledge_base_id=knowledge_base_id or None,
+            knowledge_mode=(
+                str(source.get("knowledgeMode") or "automatic")
+                if knowledge_base_id
+                else "disabled"
+            ),
+            knowledge_top_n=int(source.get("knowledgeTopN") or 5),
+            knowledge_score_threshold=float(
+                source.get("knowledgeScoreThreshold") or 0.0
+            ),
+        )
+
     def prompt_for(self, node_id: str, store: DynamicVariableStore) -> str:
+        """Build the Agent system prompt according to its inheritance setting."""
         prompt = store.render(str(self.data(node_id).get("prompt") or "").strip())
         sections = [f"[当前阶段：{self.name(node_id)}]"]
-        if self.global_prompt():
+        if self.inherits_global_config(node_id) and self.global_prompt():
             sections.append(f"[全局规则]\n{store.render(self.global_prompt())}")
         if prompt:
             sections.append(f"[当前阶段任务]\n{prompt}")
@@ -111,7 +171,11 @@ class WorkflowEngine:
             results.append(matched)
         if not results:
             return False
-        return all(results) if expression.get("combinator", "and") == "and" else any(results)
+        return (
+            all(results)
+            if expression.get("combinator", "and") == "and"
+            else any(results)
+        )
 
     def deterministic_edge(
         self,

backend/services/workflow_router.py

@@ -0,0 +1,129 @@
+"""Pre-response LLM routing for Workflow Agent edges.
+
+The router deliberately uses a separate, short completion.  Its only output is
+a required function choice, so the current Agent cannot speak before the graph
+has decided whether the user turn belongs to another node.
+"""
+
+from __future__ import annotations
+
+import json
+from collections.abc import Callable
+from typing import Any
+
+from loguru import logger
+from models import AssistantConfig
+from openai import AsyncOpenAI
+
+
+STAY_ON_CURRENT_AGENT = "workflow_stay_on_current_agent"
+MAX_ROUTING_HISTORY_ENTRIES = 20
+
+
+class WorkflowLLMRouter:
+    """Select one LLM edge before the conversational LLM is allowed to reply."""
+
+    def __init__(self, cfg: AssistantConfig):
+        self._cfg = cfg
+
+    async def select_edge(
+        self,
+        *,
+        node_name: str,
+        node_prompt: str,
+        edges: list[dict[str, Any]],
+        history: list[dict[str, str]],
+        variables: dict[str, Any],
+        edge_name: Callable[[dict[str, Any]], str],
+        edge_description: Callable[[dict[str, Any]], str],
+    ) -> str | None:
+        """Return an edge function name, STAY, or None when routing failed."""
+        if not edges:
+            return STAY_ON_CURRENT_AGENT
+
+        names = {edge_name(edge) for edge in edges}
+        stay_name = STAY_ON_CURRENT_AGENT
+        while stay_name in names:
+            stay_name = f"_{stay_name}"
+
+        tools = [
+            {
+                "type": "function",
+                "function": {
+                    "name": edge_name(edge),
+                    "description": edge_description(edge),
+                    "parameters": {"type": "object", "properties": {}},
+                },
+            }
+            for edge in edges
+        ]
+        tools.append(
+            {
+                "type": "function",
+                "function": {
+                    "name": stay_name,
+                    "description": "所有转移条件都不满足，继续由当前 Agent 处理用户消息。",
+                    "parameters": {"type": "object", "properties": {}},
+                },
+            }
+        )
+
+        ordered_conditions = "\n".join(
+            f"{index + 1}. {edge_description(edge)}"
+            for index, edge in enumerate(edges)
+        )
+        router_prompt = (
+            "你是工作流路由器，不是对话助手。收到一轮完整用户输入后，"
+            "必须且只能调用一个提供的函数，禁止输出任何口头回复。\n"
+            "按给出的顺序判断转移条件；选择第一个明确满足的转移函数。"
+            "如果没有条件满足，调用留在当前 Agent 的函数。\n\n"
+            f"当前节点：{node_name}\n"
+            f"当前节点任务：{node_prompt or '未配置'}\n"
+            f"转移条件：\n{ordered_conditions}"
+        )
+        recent_history = history[-MAX_ROUTING_HISTORY_ENTRIES:]
+        routing_input = json.dumps(
+            {
+                "conversation": recent_history,
+                "session_variables": variables,
+            },
+            ensure_ascii=False,
+            separators=(",", ":"),
+        )
+        extra_body = self._cfg.llm_values.get("extraBody")
+        request_extra = (
+            {"extra_body": extra_body} if isinstance(extra_body, dict) else {}
+        )
+        client = AsyncOpenAI(
+            api_key=self._cfg.llm_api_key,
+            base_url=self._cfg.llm_base_url,
+            timeout=15.0,
+        )
+        try:
+            response = await client.chat.completions.create(
+                model=self._cfg.model,
+                messages=[
+                    {"role": "system", "content": router_prompt},
+                    {"role": "user", "content": routing_input},
+                ],
+                tools=tools,
+                tool_choice="required",
+                temperature=0,
+                **request_extra,
+            )
+            tool_calls = response.choices[0].message.tool_calls or []
+            if not tool_calls:
+                logger.warning("Workflow 路由 LLM 未返回函数调用，留在当前 Agent")
+                return STAY_ON_CURRENT_AGENT
+            selected = str(tool_calls[0].function.name or "")
+            if selected == stay_name:
+                return STAY_ON_CURRENT_AGENT
+            if selected not in names:
+                logger.warning(f"Workflow 路由 LLM 返回未知函数:{selected}")
+                return STAY_ON_CURRENT_AGENT
+            return selected
+        except Exception as exc:  # noqa: BLE001 - routing failure must not end the call
+            logger.warning(f"Workflow LLM 边判断失败，留在当前 Agent:{exc}")
+            return None
+        finally:
+            await client.close()

backend/tests/test_brains.py

@@ -9,7 +9,10 @@ from pipecat.frames.frames import (
     LLMContextFrame,
     LLMFullResponseEndFrame,
     LLMFullResponseStartFrame,
+    LLMRunFrame,
     LLMTextFrame,
+    OutputTransportMessageUrgentFrame,
+    TTSSpeakFrame,
 )
 from pipecat.processors.aggregators.llm_context import LLMContext
 from pipecat.processors.frame_processor import FrameDirection
@@ -388,10 +391,108 @@ class PromptBrainTests(unittest.IsolatedAsyncioTestCase):
 
 
 class WorkflowBrainTests(unittest.IsolatedAsyncioTestCase):
+    async def test_nodes_without_outgoing_edges_remain_active(self):
+        queued = []
+
+        async def queue_frame(frame):
+            queued.append(frame)
+
+        runtime = BrainRuntime(
+            context=LLMContext(messages=[]),
+            llm=FakeLLM(),
+            queue_frame=queue_frame,
+            set_system_prompt=lambda _prompt: None,
+            set_tools=lambda _tools: None,
+            call_end=FakeCallEnd(),
+        )
+
+        class FakeManager:
+            def __init__(self, current_node=None):
+                self.current_node = current_node
+
+            async def initialize(self, config):
+                self.current_node = config["name"]
+
+        start_brain = WorkflowBrain(
+            {
+                "specVersion": 3,
+                "settings": {},
+                "nodes": [{"id": "start", "type": "start", "data": {}}],
+                "edges": [],
+            }
+        )
+        start_brain._runtime = runtime
+        start_brain._manager = FakeManager()
+        await start_brain.on_connected()
+        self.assertEqual(start_brain._manager.current_node, "start")
+
+        agent_brain = WorkflowBrain(
+            {
+                "specVersion": 3,
+                "settings": {"globalPrompt": "全局规则"},
+                "nodes": [
+                    {"id": "start", "type": "start", "data": {}},
+                    {
+                        "id": "agent",
+                        "type": "agent",
+                        "data": {"prompt": "持续回答"},
+                    },
+                ],
+                "edges": [
+                    {
+                        "id": "begin",
+                        "source": "start",
+                        "target": "agent",
+                        "data": {"mode": "always", "priority": 0},
+                    }
+                ],
+            }
+        )
+        agent_brain._runtime = runtime
+        agent_brain._manager = FakeManager("agent")
+        queued.clear()
+        handled = await agent_brain.on_user_turn_end("请继续回答")
+        self.assertTrue(handled)
+        self.assertEqual(agent_brain._manager.current_node, "agent")
+        self.assertTrue(any(isinstance(frame, LLMRunFrame) for frame in queued))
+
+        handoff_brain = WorkflowBrain(
+            {
+                "specVersion": 3,
+                "settings": {},
+                "nodes": [
+                    {"id": "start", "type": "start", "data": {}},
+                    {
+                        "id": "handoff",
+                        "type": "handoff",
+                        "data": {"targetType": "human"},
+                    },
+                ],
+                "edges": [],
+            }
+        )
+        handoff_brain._runtime = runtime
+        handoff_config = await handoff_brain._resolve_path("handoff")
+        self.assertEqual(handoff_config["name"], "handoff")
+        self.assertTrue(
+            any(
+                isinstance(frame, OutputTransportMessageUrgentFrame)
+                and frame.message.get("type") == "handoff-requested"
+                for frame in queued
+            )
+        )
+
     async def test_transition_and_end_are_owned_by_workflow_brain(self):
         graph = {
             "specVersion": 3,
-            "settings": {"globalPrompt": "全局规则"},
+            "settings": {
+                "globalPrompt": "全局规则",
+                "defaultLlmResourceId": "llm_global",
+                "defaultAsrResourceId": "asr_global",
+                "defaultTtsResourceId": "tts_global",
+                "knowledgeBaseId": "kb_global",
+                "knowledgeMode": "automatic",
+            },
             "nodes": [
                 {
                     "id": "start",
@@ -428,6 +529,7 @@ class WorkflowBrainTests(unittest.IsolatedAsyncioTestCase):
                         "mode": "llm",
                         "priority": 10,
                         "condition": "需求已收集",
+                        "transitionSpeech": "正在为你结束流程",
                     },
                 }
             ],
@@ -447,6 +549,8 @@ class WorkflowBrainTests(unittest.IsolatedAsyncioTestCase):
         llm = FakeLLM()
         context = LLMContext(messages=[])
         queued = []
+        service_switches = []
+        knowledge_scopes = []
         call_end = FakeCallEnd()
 
         class FakeWorker:
@@ -478,6 +582,9 @@ class WorkflowBrainTests(unittest.IsolatedAsyncioTestCase):
         async def queue_frame(frame):
             queued.append(frame)
 
+        async def switch_services(llm_id, asr_id, tts_id):
+            service_switches.append((llm_id, asr_id, tts_id))
+
         runtime = BrainRuntime(
             context=context,
             llm=llm,
@@ -487,29 +594,112 @@ class WorkflowBrainTests(unittest.IsolatedAsyncioTestCase):
             call_end=call_end,
             worker=worker,
             context_aggregator=pair,
+            switch_services=switch_services,
+            set_knowledge_scope=knowledge_scopes.append,
         )
         await brain.setup(cfg, runtime)
         await brain.on_connected()
         self.assertEqual(brain._manager.current_node, "agent")
+        self.assertEqual(
+            service_switches,
+            [("llm_global", "asr_global", "tts_global")],
+        )
+        self.assertEqual(knowledge_scopes[-1]["knowledge_base_id"], "kb_global")
+
+        brain._engine.data("agent").update(
+            {
+                "inheritGlobalConfig": False,
+                "llmResourceId": "llm_agent",
+                "asrResourceId": "asr_agent",
+                "ttsResourceId": "tts_agent",
+                "knowledgeBaseId": "kb_agent",
+                "knowledgeMode": "on_demand",
+            }
+        )
+        await brain._apply_agent_stage("agent")
+        self.assertEqual(
+            service_switches[-1],
+            ("llm_agent", "asr_agent", "tts_agent"),
+        )
+        self.assertEqual(knowledge_scopes[-1]["knowledge_base_id"], "kb_agent")
         agent_config = brain._agent_config("agent")
         self.assertIn("王先生", agent_config["role_message"])
-        self.assertIn("完成当前阶段任务", agent_config["role_message"])
+        self.assertIn("工作流路由已在用户一轮输入结束时完成", agent_config["role_message"])
         self.assertEqual(agent_config["task_messages"], [])
+        self.assertFalse(agent_config["respond_immediately"])
+        self.assertFalse(any(isinstance(frame, LLMRunFrame) for frame in worker.frames))
         self.assertEqual(
             agent_config["context_strategy"].strategy.value,
             "reset",
         )
 
-        edge_function = next(
-            function
-            for function in brain._agent_config("agent")["functions"]
-            if function.name == "goto_finish"
+        brain._engine.data("agent")["entryMode"] = "generate"
+        generate_config = brain._agent_config("agent")
+        self.assertTrue(generate_config["respond_immediately"])
+        worker.frames.clear()
+        await brain._manager.set_node_from_config(generate_config)
+        self.assertTrue(any(isinstance(frame, LLMRunFrame) for frame in worker.frames))
+
+        brain._engine.data("agent").update(
+            {"entryMode": "fixed_speech", "entrySpeech": "您好，{{user_name}}"}
         )
-        _, terminal = await edge_function.handler({}, brain._manager)
-        self.assertEqual(terminal["name"], "end")
+        fixed_config = brain._agent_config("agent")
+        self.assertFalse(fixed_config["respond_immediately"])
+        self.assertEqual(
+            fixed_config["pre_actions"][0]["type"],
+            "workflow_fixed_speech",
+        )
+        self.assertEqual(fixed_config["pre_actions"][0]["text"], "您好，王先生")
+        self.assertEqual(
+            fixed_config["task_messages"],
+            [{"role": "assistant", "content": "您好，王先生"}],
+        )
+        worker.frames.clear()
+        queued.clear()
+        await brain._manager.set_node_from_config(fixed_config)
+        self.assertTrue(any(isinstance(frame, TTSSpeakFrame) for frame in queued))
+        self.assertFalse(any(isinstance(frame, LLMRunFrame) for frame in worker.frames))
+
+        self.assertFalse(
+            any(
+                function.name == "goto_finish"
+                for function in brain._agent_config("agent")["functions"]
+            )
+        )
+        await brain.on_assistant_text_end("old-turn", "需求已收集", False)
+        self.assertEqual(brain._manager.current_node, "agent")
+
+        class FakeRouter:
+            async def select_edge(self, **_kwargs):
+                return "goto_finish"
+
+        brain._router = FakeRouter()
+        handled = await brain.on_user_turn_end("我的需求已经说完了")
+        self.assertTrue(handled)
+        self.assertEqual(brain._manager.current_node, "end")
+        self.assertIn("我的需求已经说完了", brain._store.values["system__conversation_history"])
         self.assertTrue(call_end.ending)
         self.assertTrue(call_end.armed)
         self.assertTrue(any(getattr(frame, "text", "") == "感谢来电" for frame in queued))
+        assistant_transcripts = [
+            frame.message.get("content")
+            for frame in queued
+            if isinstance(frame, OutputTransportMessageUrgentFrame)
+            and frame.message.get("type") == "transcript"
+            and frame.message.get("role") == "assistant"
+        ]
+        self.assertEqual(
+            assistant_transcripts,
+            ["您好，王先生", "正在为你结束流程", "感谢来电"],
+        )
+        self.assertIn(
+            "正在为你结束流程",
+            brain._store.values["system__conversation_history"],
+        )
+        self.assertIn(
+            "感谢来电",
+            brain._store.values["system__conversation_history"],
+        )
 
 
 if __name__ == "__main__":

backend/tests/test_pipeline_knowledge.py

@@ -1,9 +1,13 @@
 import unittest
 
 from models import AssistantConfig
+from pipecat.frames.frames import LLMContextFrame
+from pipecat.processors.aggregators.llm_context import LLMContext
+from pipecat.processors.frame_processor import FrameDirection
 from services.pipecat.pipeline import (
     KNOWLEDGE_CONTEXT_MARKER,
     KnowledgeRetrievalProcessor,
+    UserTurnRoutingProcessor,
     _knowledge_tool_description,
 )
 
@@ -57,5 +61,37 @@ class KnowledgeToolDescriptionTest(unittest.TestCase):
         self.assertFalse(any(message["role"] == "developer" for message in messages))
 
 
+class UserTurnRoutingProcessorTest(unittest.IsolatedAsyncioTestCase):
+    async def test_routes_each_user_message_once_before_response_run(self):
+        class FakeBrain:
+            def __init__(self):
+                self.turns = []
+
+            async def on_user_turn_end(self, content):
+                self.turns.append(content)
+                return True
+
+        brain = FakeBrain()
+        processor = UserTurnRoutingProcessor(brain)
+        forwarded = []
+
+        async def push_frame(frame, direction):
+            forwarded.append((frame, direction))
+
+        processor.push_frame = push_frame
+        context = LLMContext(messages=[{"role": "user", "content": "我叫李白"}])
+        frame = LLMContextFrame(context)
+
+        await processor.process_frame(frame, FrameDirection.DOWNSTREAM)
+        self.assertEqual(brain.turns, ["我叫李白"])
+        self.assertEqual(forwarded, [])
+
+        # A queued LLMRunFrame after the transition uses the same context. It
+        # must reach the target Agent without invoking routing a second time.
+        await processor.process_frame(frame, FrameDirection.DOWNSTREAM)
+        self.assertEqual(brain.turns, ["我叫李白"])
+        self.assertEqual(forwarded, [(frame, FrameDirection.DOWNSTREAM)])
+
+
 if __name__ == "__main__":
     unittest.main()

backend/tests/test_workflow_router.py

@@ -0,0 +1,75 @@
+from __future__ import annotations
+
+import unittest
+from types import SimpleNamespace
+from unittest.mock import patch
+
+from models import AssistantConfig
+from services.workflow_router import WorkflowLLMRouter
+
+
+class WorkflowLLMRouterTest(unittest.IsolatedAsyncioTestCase):
+    async def test_uses_required_tool_choice_without_developer_messages(self):
+        requests = []
+
+        class FakeCompletions:
+            async def create(self, **kwargs):
+                requests.append(kwargs)
+                return SimpleNamespace(
+                    choices=[
+                        SimpleNamespace(
+                            message=SimpleNamespace(
+                                tool_calls=[
+                                    SimpleNamespace(
+                                        function=SimpleNamespace(name="goto_age", arguments="{}")
+                                    )
+                                ]
+                            )
+                        )
+                    ]
+                )
+
+        class FakeClient:
+            def __init__(self, **_kwargs):
+                self.chat = SimpleNamespace(completions=FakeCompletions())
+                self.closed = False
+
+            async def close(self):
+                self.closed = True
+
+        cfg = AssistantConfig(
+            type="workflow",
+            model="deepseek-chat",
+            llm_api_key="secret",
+            llm_base_url="https://llm.test/v1",
+        )
+        router = WorkflowLLMRouter(cfg)
+        edges = [
+            {
+                "id": "age",
+                "data": {"condition": "用户已经回答姓名", "priority": 10},
+            }
+        ]
+
+        with patch("services.workflow_router.AsyncOpenAI", FakeClient):
+            selected = await router.select_edge(
+                node_name="询问姓名",
+                node_prompt="询问用户姓名",
+                edges=edges,
+                history=[{"role": "user", "message": "我叫李白"}],
+                variables={"customer_type": "new"},
+                edge_name=lambda _edge: "goto_age",
+                edge_description=lambda _edge: "用户已经回答姓名",
+            )
+
+        self.assertEqual(selected, "goto_age")
+        self.assertEqual(requests[0]["tool_choice"], "required")
+        self.assertEqual(
+            [message["role"] for message in requests[0]["messages"]],
+            ["system", "user"],
+        )
+        self.assertNotIn("developer", str(requests[0]["messages"]))
+
+
+if __name__ == "__main__":
+    unittest.main()

backend/tests/test_workflow_v3.py

@@ -4,7 +4,7 @@ import unittest
 
 from models import AssistantConfig, RuntimeModelResource
 from services.pipecat.service_factory import config_with_resource
-from services.node_specs import normalize_graph, validate_graph
+from services.node_specs import graph_references, normalize_graph, validate_graph
 from services.runtime_variables import DynamicVariableStore, prepare_dynamic_config
 from services.workflow_engine import WorkflowEngine
 
@@ -49,6 +49,22 @@ def valid_graph():
 
 
 class WorkflowGraphTests(unittest.TestCase):
+    def test_agent_entry_mode_defaults_and_validation(self):
+        graph = valid_graph()
+        normalized = normalize_graph(graph)
+        agent = next(node for node in normalized["nodes"] if node["type"] == "agent")
+        self.assertEqual(agent["data"]["entryMode"], "wait_user")
+        self.assertEqual(agent["data"]["entrySpeech"], "")
+        self.assertTrue(agent["data"]["inheritGlobalConfig"])
+        self.assertEqual(agent["data"]["contextPolicy"], "fresh")
+
+        agent["data"]["entryMode"] = "fixed_speech"
+        self.assertTrue(
+            any("固定进入语不能为空" in error for error in validate_graph(normalized))
+        )
+        agent["data"]["entrySpeech"] = "您好，{{customer}}"
+        self.assertEqual(validate_graph(normalized), [])
+
     def test_voice_resource_creates_isolated_runtime_config(self):
         base = AssistantConfig(type="workflow", asr="default", voice="default")
         asr = RuntimeModelResource(
@@ -63,6 +79,191 @@ class WorkflowGraphTests(unittest.TestCase):
         self.assertEqual(resolved.stt_api_key, "secret")
         self.assertEqual(base.asr, "default")
 
+        llm = RuntimeModelResource(
+            id="llm_1",
+            capability="LLM",
+            interface_type="openai-llm",
+            values={"modelId": "deepseek-chat", "apiUrl": "https://llm.test/v1"},
+            secrets={"apiKey": "llm-secret"},
+        )
+        llm_resolved = config_with_resource(base, llm)
+        self.assertEqual(llm_resolved.model, "deepseek-chat")
+        self.assertEqual(llm_resolved.llm_api_key, "llm-secret")
+
+    def test_global_and_custom_agent_references_are_preserved(self):
+        graph = valid_graph()
+        graph["settings"].update(
+            {
+                "defaultLlmResourceId": "llm_global",
+                "defaultAsrResourceId": "asr_global",
+                "defaultTtsResourceId": "tts_global",
+                "toolIds": ["tool_global"],
+                "knowledgeBaseId": "kb_global",
+            }
+        )
+        agent = next(node for node in graph["nodes"] if node["type"] == "agent")
+        agent["data"].update(
+            {
+                "inheritGlobalConfig": False,
+                "llmResourceId": "llm_agent",
+                "asrResourceId": "asr_agent",
+                "ttsResourceId": "tts_agent",
+                "toolIds": ["tool_agent"],
+                "knowledgeBaseId": "kb_agent",
+            }
+        )
+
+        refs = graph_references(graph)
+        self.assertEqual(
+            refs["model_resources"],
+            {
+                "llm_global",
+                "asr_global",
+                "tts_global",
+                "llm_agent",
+                "asr_agent",
+                "tts_agent",
+            },
+        )
+        self.assertEqual(refs["tools"], {"tool_global", "tool_agent"})
+        self.assertEqual(refs["knowledge_bases"], {"kb_global", "kb_agent"})
+
+    def test_existing_agent_override_disables_implicit_inheritance(self):
+        graph = valid_graph()
+        agent = next(node for node in graph["nodes"] if node["type"] == "agent")
+        agent["data"]["toolIds"] = ["legacy_tool"]
+        normalized = normalize_graph(graph)
+        normalized_agent = next(
+            node for node in normalized["nodes"] if node["type"] == "agent"
+        )
+        self.assertFalse(normalized_agent["data"]["inheritGlobalConfig"])
+
+    def test_inherited_agent_ignores_stale_custom_references(self):
+        graph = valid_graph()
+        agent = next(node for node in graph["nodes"] if node["type"] == "agent")
+        agent["data"].update(
+            {
+                "inheritGlobalConfig": True,
+                "llmResourceId": "stale_llm",
+                "asrResourceId": "stale_asr",
+                "ttsResourceId": "stale_tts",
+                "toolIds": ["stale_tool"],
+                "knowledgeBaseId": "stale_kb",
+            }
+        )
+
+        refs = graph_references(graph)
+
+        self.assertNotIn("stale_llm", refs["model_resources"])
+        self.assertNotIn("stale_tool", refs["tools"])
+        self.assertNotIn("stale_kb", refs["knowledge_bases"])
+
+    def test_agent_effective_config_inherits_then_switches_to_override(self):
+        graph = valid_graph()
+        graph["settings"].update(
+            {
+                "defaultLlmResourceId": "llm_global",
+                "defaultAsrResourceId": "asr_global",
+                "defaultTtsResourceId": "tts_global",
+                "toolIds": ["tool_global"],
+                "knowledgeBaseId": "kb_global",
+                "knowledgeMode": "on_demand",
+                "knowledgeTopN": 8,
+                "knowledgeScoreThreshold": 0.4,
+            }
+        )
+        engine = WorkflowEngine(graph)
+        inherited = engine.agent_stage_config("agent")
+        self.assertEqual(inherited.llm_resource_id, "llm_global")
+        self.assertEqual(inherited.tool_ids, ("tool_global",))
+        self.assertEqual(inherited.knowledge_mode, "on_demand")
+
+        engine.data("agent").update(
+            {
+                "inheritGlobalConfig": False,
+                "llmResourceId": "llm_agent",
+                "toolIds": ["tool_agent"],
+                "knowledgeBaseId": "",
+            }
+        )
+        custom = engine.agent_stage_config("agent")
+        self.assertEqual(custom.llm_resource_id, "llm_agent")
+        self.assertEqual(custom.tool_ids, ("tool_agent",))
+        self.assertEqual(custom.knowledge_mode, "disabled")
+
+    def test_start_agent_and_handoff_may_have_no_outgoing_edge(self):
+        terminal_graphs = [
+            {
+                "specVersion": 3,
+                "settings": {},
+                "nodes": [{"id": "start", "type": "start", "data": {}}],
+                "edges": [],
+            },
+            {
+                "specVersion": 3,
+                "settings": {},
+                "nodes": [
+                    {"id": "start", "type": "start", "data": {}},
+                    {
+                        "id": "agent",
+                        "type": "agent",
+                        "data": {"prompt": "持续处理用户问题"},
+                    },
+                ],
+                "edges": [
+                    {
+                        "id": "begin",
+                        "source": "start",
+                        "target": "agent",
+                        "data": {"mode": "always", "priority": 0},
+                    }
+                ],
+            },
+            {
+                "specVersion": 3,
+                "settings": {},
+                "nodes": [
+                    {"id": "start", "type": "start", "data": {}},
+                    {"id": "handoff", "type": "handoff", "data": {}},
+                ],
+                "edges": [
+                    {
+                        "id": "begin",
+                        "source": "start",
+                        "target": "handoff",
+                        "data": {"mode": "always", "priority": 0},
+                    }
+                ],
+            },
+        ]
+
+        for graph in terminal_graphs:
+            with self.subTest(node=graph["nodes"][-1]["type"]):
+                self.assertEqual(validate_graph(graph), [])
+
+        action_without_exit = {
+            "specVersion": 3,
+            "settings": {},
+            "nodes": [
+                {"id": "start", "type": "start", "data": {}},
+                {"id": "action", "type": "action", "data": {}},
+            ],
+            "edges": [
+                {
+                    "id": "begin",
+                    "source": "start",
+                    "target": "action",
+                    "data": {"mode": "always", "priority": 0},
+                }
+            ],
+        }
+        self.assertTrue(
+            any(
+                "action 的出边不能少于 1" in error
+                for error in validate_graph(action_without_exit)
+            )
+        )
+
     def test_v2_start_prompt_is_preserved_in_synthetic_agent(self):
         graph = normalize_graph(
             {
@@ -113,6 +314,15 @@ class WorkflowGraphTests(unittest.TestCase):
         )
         self.assertIn("王先生", engine.prompt_for("agent", store))
 
+        inherited_prompt = engine.prompt_for("agent", store)
+        self.assertIn("服务 王先生", inherited_prompt)
+        self.assertIn("处理订单", inherited_prompt)
+
+        engine.data("agent")["inheritGlobalConfig"] = False
+        custom_prompt = engine.prompt_for("agent", store)
+        self.assertNotIn("服务 王先生", custom_prompt)
+        self.assertIn("处理订单", custom_prompt)
+
 
 if __name__ == "__main__":
     unittest.main()

frontend/src/components/editor/knowledge-retrieval-config-dialog.tsx

@@ -0,0 +1,168 @@
+"use client";
+
+import { Settings2 } from "lucide-react";
+import { useState } from "react";
+
+import { Button } from "@/components/ui/button";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { Input } from "@/components/ui/input";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import type { KnowledgeRetrievalConfig } from "@/lib/api";
+
+export const DEFAULT_KNOWLEDGE_RETRIEVAL_CONFIG: KnowledgeRetrievalConfig = {
+  mode: "automatic",
+  topN: 5,
+  scoreThreshold: 0,
+};
+
+export function KnowledgeRetrievalConfigDialog({
+  disabled,
+  value,
+  onChange,
+}: {
+  disabled: boolean;
+  value: KnowledgeRetrievalConfig;
+  onChange: (config: KnowledgeRetrievalConfig) => void;
+}) {
+  const [open, setOpen] = useState(false);
+  const [draft, setDraft] = useState(value);
+  const [error, setError] = useState<string | null>(null);
+
+  function openDialog() {
+    setDraft(value);
+    setError(null);
+    setOpen(true);
+  }
+
+  function saveDraft() {
+    if (draft.topN === 0 || draft.topN < -1 || !Number.isInteger(draft.topN)) {
+      setError("Top N 必须为 -1 或大于 0 的整数");
+      return;
+    }
+    if (draft.scoreThreshold < 0 || draft.scoreThreshold > 1) {
+      setError("最低相关度必须在 0 到 1 之间");
+      return;
+    }
+    onChange(draft);
+    setOpen(false);
+  }
+
+  return (
+    <>
+      <button
+        type="button"
+        disabled={disabled}
+        onClick={openDialog}
+        aria-label="打开知识库高级配置"
+        title={
+          disabled
+            ? "请先选择知识库"
+            : `${value.mode === "automatic" ? "自动检索" : "模型主动检索"} · Top N ${value.topN === -1 ? "不限" : value.topN} · 最低相关度 ${value.scoreThreshold}`
+        }
+        className="flex h-5 w-5 items-center justify-center rounded-full text-muted-soft transition-colors hover:bg-surface-strong hover:text-foreground disabled:cursor-not-allowed disabled:opacity-40"
+      >
+        <Settings2 size={14} />
+      </button>
+
+      <Dialog open={open} onOpenChange={setOpen}>
+        <DialogContent className="sm:max-w-lg">
+          <DialogHeader>
+            <DialogTitle>知识库高级配置</DialogTitle>
+            <DialogDescription>
+              设置检索触发方式、返回数量和相关度过滤条件。
+            </DialogDescription>
+          </DialogHeader>
+
+          <div className="space-y-5 py-2">
+            <div className="space-y-2">
+              <div className="text-sm font-medium text-foreground">检索方式</div>
+              <Select
+                value={draft.mode}
+                onValueChange={(mode: "automatic" | "on_demand") =>
+                  setDraft({ ...draft, mode })
+                }
+              >
+                <SelectTrigger className="w-full border-hairline-strong bg-background">
+                  <SelectValue />
+                </SelectTrigger>
+                <SelectContent>
+                  <SelectItem value="automatic">自动检索</SelectItem>
+                  <SelectItem value="on_demand">模型主动检索</SelectItem>
+                </SelectContent>
+              </Select>
+              <p className="text-xs text-muted-foreground">
+                {draft.mode === "automatic"
+                  ? "每轮用户提问后自动检索，响应行为更稳定。"
+                  : "由大模型判断是否调用知识库，依赖模型的工具调用能力。"}
+              </p>
+            </div>
+
+            <label className="block">
+              <span className="mb-2 block text-sm font-medium text-foreground">
+                最多返回片段数
+              </span>
+              <Input
+                type="number"
+                step="1"
+                min="-1"
+                value={draft.topN}
+                onChange={(event) =>
+                  setDraft({ ...draft, topN: Number(event.target.value) })
+                }
+              />
+              <span className="mt-1.5 block text-xs text-muted-foreground">
+                填写 -1 时保留所有达到阈值的结果。
+              </span>
+            </label>
+
+            <label className="block">
+              <span className="mb-2 block text-sm font-medium text-foreground">
+                最低相关度
+              </span>
+              <Input
+                type="number"
+                step="0.01"
+                min="0"
+                max="1"
+                value={draft.scoreThreshold}
+                onChange={(event) =>
+                  setDraft({
+                    ...draft,
+                    scoreThreshold: Number(event.target.value),
+                  })
+                }
+              />
+              <span className="mt-1.5 block text-xs text-muted-foreground">
+                仅保留相关度达到该值的片段，范围 0–1。
+              </span>
+            </label>
+
+            {error && <p className="text-sm text-destructive">{error}</p>}
+          </div>
+
+          <DialogFooter>
+            <Button type="button" variant="outline" onClick={() => setOpen(false)}>
+              取消
+            </Button>
+            <Button type="button" onClick={saveDraft}>
+              保存配置
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+    </>
+  );
+}

frontend/src/components/editor/section-card.tsx

@@ -0,0 +1,92 @@
+"use client";
+
+/**
+ * Compact section chrome shared by assistant editors and workflow node panels.
+ * Density matches the debug preview drawer (text-sm titles, tight padding).
+ */
+
+import { HelpCircle } from "lucide-react";
+import type { ReactNode } from "react";
+
+import {
+  Card,
+  CardContent,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import {
+  Popover,
+  PopoverContent,
+  PopoverTrigger,
+} from "@/components/ui/popover";
+import { cn } from "@/lib/utils";
+
+export function SectionCard({
+  icon,
+  title,
+  description,
+  children,
+  className,
+}: {
+  icon?: ReactNode;
+  title?: string;
+  description?: string;
+  children: ReactNode;
+  className?: string;
+}) {
+  const hasHeader = Boolean(title);
+
+  return (
+    <Card
+      size="sm"
+      className={cn(
+        "gap-3 rounded-2xl border border-hairline bg-card py-3.5 text-card-foreground shadow-sm ring-0",
+        className,
+      )}
+    >
+      {hasHeader && (
+        <CardHeader className="gap-0 px-4">
+          <div className="flex items-center gap-2.5">
+            {icon && (
+              <div className="flex h-8 w-8 shrink-0 items-center justify-center rounded-full bg-surface-strong text-foreground">
+                {icon}
+              </div>
+            )}
+            <div className="flex min-w-0 items-center gap-1.5">
+              <CardTitle className="text-sm font-medium leading-none">
+                {title}
+              </CardTitle>
+              {description && <HelpHint text={description} />}
+            </div>
+          </div>
+        </CardHeader>
+      )}
+      <CardContent className={cn("px-4", hasHeader && "space-y-3")}>
+        {children}
+      </CardContent>
+    </Card>
+  );
+}
+
+export function HelpHint({ text }: { text: string }) {
+  return (
+    <Popover>
+      <PopoverTrigger asChild>
+        <button
+          type="button"
+          aria-label="查看说明"
+          onClick={(event) => event.stopPropagation()}
+          className="flex h-5 w-5 shrink-0 items-center justify-center rounded-full text-muted-soft transition-colors hover:bg-surface-strong hover:text-foreground"
+        >
+          <HelpCircle size={13} />
+        </button>
+      </PopoverTrigger>
+      <PopoverContent
+        align="start"
+        className="w-72 text-sm leading-6 text-muted-foreground"
+      >
+        {text}
+      </PopoverContent>
+    </Popover>
+  );
+}

frontend/src/components/pages/AssistantPage.tsx

@@ -21,7 +21,6 @@ import {
   Save,
   Mic,
   Send,
-  HelpCircle,
   Waypoints,
   AudioLines,
   Terminal,
@@ -87,12 +86,6 @@ import { PageHeader } from "@/components/ui/page-header";
 import { FilterPills } from "@/components/ui/filter-pills";
 import { SearchInput } from "@/components/ui/search-input";
 import { ListToolbar } from "@/components/ui/list-toolbar";
-import {
-  Card,
-  CardContent,
-  CardHeader,
-  CardTitle,
-} from "@/components/ui/card";
 import { useCallback, useEffect, useRef, useState } from "react";
 import { useRouter } from "next/navigation";
 import {
@@ -124,6 +117,7 @@ import {
   WorkflowEditor,
   type WorkflowSettings,
 } from "@/components/workflow/WorkflowEditor";
+import { HelpHint, SectionCard } from "@/components/editor/section-card";
 import {
   defaultGraph,
   type WorkflowGraph,
@@ -362,7 +356,7 @@ type AssistantTypeOption = {
   label: string;
   description: string;
   icon: React.ReactNode;
-  /** 提示词、Dify、FastGPT 类型已落地，工作流暂时显示占位页 */
+  /** 提示词、工作流、Dify、FastGPT 已落地；OpenCode 暂时显示即将上线 */
   available: boolean;
 };
 
@@ -379,7 +373,7 @@ const assistantTypeOptions: AssistantTypeOption[] = [
     label: "使用工作流构建",
     description: "用可视化编排串联多个节点，适合多步骤、带分支的复杂流程。",
     icon: <Workflow size={20} />,
-    available: false,
+    available: true,
   },
   {
     type: "Dify",
@@ -400,7 +394,7 @@ const assistantTypeOptions: AssistantTypeOption[] = [
     label: "使用 OpenCode 构建",
     description: "对接 OpenCode 服务，通过提示词驱动代码助手并支持实时语音对话。",
     icon: <Terminal size={20} />,
-    available: true,
+    available: false,
   },
 ];
 
@@ -472,12 +466,23 @@ export function AssistantPage(props: AssistantPageProps) {
   );
   const [workflowSettings, setWorkflowSettings] = useState<WorkflowSettings>({
     globalPrompt: defaultGraph().settings.globalPrompt,
+    llm: defaultGraph().settings.defaultLlmResourceId,
+    asr: defaultGraph().settings.defaultAsrResourceId,
+    tts: defaultGraph().settings.defaultTtsResourceId,
+    toolIds: defaultGraph().settings.toolIds,
+    knowledgeBaseId: defaultGraph().settings.knowledgeBaseId,
+    knowledgeRetrievalConfig: {
+      mode: defaultGraph().settings.knowledgeMode,
+      topN: defaultGraph().settings.knowledgeTopN,
+      scoreThreshold: defaultGraph().settings.knowledgeScoreThreshold,
+    },
     allowInterrupt: true,
     turnConfig: defaultTurnConfig(),
   });
   const [workflowDynamicVariableDefinitions, setWorkflowDynamicVariableDefinitions] =
     useState<Record<string, DynamicVariableDefinition>>({});
   const [workflowDebugOpen, setWorkflowDebugOpen] = useState(false);
+  const [workflowSettingsOpen, setWorkflowSettingsOpen] = useState(false);
   const [workflowEditingNodeId, setWorkflowEditingNodeId] = useState<string | null>(null);
   const [workflowEditingEdgeId, setWorkflowEditingEdgeId] = useState<string | null>(null);
   const [activeNodeId, setActiveNodeId] = useState<string | null>(null);
@@ -847,9 +852,25 @@ export function AssistantPage(props: AssistantPageProps) {
               ? (assistant.graph as WorkflowGraph)
               : defaultGraph();
           const wfSettings: WorkflowSettings = {
-            llm: assistant.modelResourceIds.LLM,
+            llm:
+              graph.settings?.defaultLlmResourceId ||
+              assistant.modelResourceIds.LLM,
             asr: graph.settings?.defaultAsrResourceId || assistant.modelResourceIds.ASR,
             tts: graph.settings?.defaultTtsResourceId || assistant.modelResourceIds.TTS,
+            toolIds: graph.settings?.toolIds ?? [],
+            knowledgeBaseId:
+              graph.settings?.knowledgeBaseId || assistant.knowledgeBaseId || "",
+            knowledgeRetrievalConfig: {
+              mode:
+                graph.settings?.knowledgeMode ||
+                assistant.knowledgeRetrievalConfig.mode,
+              topN:
+                graph.settings?.knowledgeTopN ??
+                assistant.knowledgeRetrievalConfig.topN,
+              scoreThreshold:
+                graph.settings?.knowledgeScoreThreshold ??
+                assistant.knowledgeRetrievalConfig.scoreThreshold,
+            },
             globalPrompt: graph.settings?.globalPrompt ?? "",
             allowInterrupt: assistant.enableInterrupt,
             turnConfig: assistant.turnConfig,
@@ -916,6 +937,9 @@ export function AssistantPage(props: AssistantPageProps) {
           ...(workflowSettings.asr ? { ASR: workflowSettings.asr } : {}),
           ...(workflowSettings.tts ? { TTS: workflowSettings.tts } : {}),
         },
+        knowledgeBaseId: workflowSettings.knowledgeBaseId || null,
+        knowledgeRetrievalConfig: workflowSettings.knowledgeRetrievalConfig,
+        toolIds: workflowSettings.toolIds,
         graph: workflowGraph as unknown as Record<string, unknown>,
         dynamicVariableDefinitions: workflowDynamicVariableDefinitions,
       }),
@@ -1386,7 +1410,7 @@ export function AssistantPage(props: AssistantPageProps) {
               <span
                 role="alert"
                 title={saveError}
-                className="line-clamp-2 max-w-[min(42vw,560px)] self-center text-right text-sm leading-5 text-destructive"
+                className="line-clamp-1 max-w-[min(42vw,560px)] self-center text-right text-sm leading-5 text-destructive"
               >
                 {saveError}
               </span>
@@ -1396,6 +1420,7 @@ export function AssistantPage(props: AssistantPageProps) {
               className="gap-2 border-hairline-strong text-foreground hover:bg-surface-strong"
               disabled={!editingId}
               onClick={() => {
+                setWorkflowSettingsOpen(false);
                 setWorkflowEditingNodeId(null);
                 setWorkflowEditingEdgeId(null);
                 setWorkflowDebugOpen(true);
@@ -1430,6 +1455,8 @@ export function AssistantPage(props: AssistantPageProps) {
             onEditingNodeIdChange={setWorkflowEditingNodeId}
             editingEdgeId={workflowEditingEdgeId}
             onEditingEdgeIdChange={setWorkflowEditingEdgeId}
+            settingsOpen={workflowSettingsOpen}
+            onSettingsOpenChange={setWorkflowSettingsOpen}
             debugOpen={workflowDebugOpen}
             onDebugOpenChange={(open) => {
               setWorkflowDebugOpen(open);
@@ -1508,10 +1535,10 @@ export function AssistantPage(props: AssistantPageProps) {
           </div>
         </div>
 
-        <div className="flex min-h-0 flex-1 gap-6">
-          <div className="scrollbar-subtle min-w-0 flex-1 space-y-5 overflow-y-auto pr-1">
+        <div className="flex min-h-0 flex-1 gap-4">
+          <div className="scrollbar-subtle min-w-0 flex-1 space-y-3 overflow-y-auto pr-1">
             <SectionCard
-              icon={<Boxes size={18} />}
+              icon={<Boxes size={15} />}
               title="Dify 应用配置"
               description="从「模型资源」中选择 Dify 应用。开场白、知识库、提示词等对话编排请在 Dify 平台配置，本页不重复设置。"
             >
@@ -1525,7 +1552,7 @@ export function AssistantPage(props: AssistantPageProps) {
             </SectionCard>
 
             <SectionCard
-              icon={<Brain size={18} />}
+              icon={<Brain size={15} />}
               title="语音配置"
               description="从「模型资源」中选择语音识别与语音合成。大模型、知识库与开场白由 Dify 应用提供，请前往 Dify 平台配置。"
             >
@@ -1546,7 +1573,7 @@ export function AssistantPage(props: AssistantPageProps) {
             </SectionCard>
 
             <SectionCard
-              icon={<Sparkles size={18} />}
+              icon={<Sparkles size={15} />}
               title="交互策略"
               description="设置实时视频对话时的交互体验"
             >
@@ -1604,10 +1631,10 @@ export function AssistantPage(props: AssistantPageProps) {
           </div>
         </div>
 
-        <div className="flex min-h-0 flex-1 gap-6">
-          <div className="scrollbar-subtle min-w-0 flex-1 space-y-5 overflow-y-auto pr-1">
+        <div className="flex min-h-0 flex-1 gap-4">
+          <div className="scrollbar-subtle min-w-0 flex-1 space-y-3 overflow-y-auto pr-1">
             <SectionCard
-              icon={<Database size={18} />}
+              icon={<Database size={15} />}
               title="FastGPT 应用配置"
               description="从「模型资源」中选择 FastGPT 应用。开场白、知识库、提示词等对话编排请在 FastGPT 平台配置，本页不重复设置。"
             >
@@ -1621,7 +1648,7 @@ export function AssistantPage(props: AssistantPageProps) {
             </SectionCard>
 
             <SectionCard
-              icon={<Brain size={18} />}
+              icon={<Brain size={15} />}
               title="语音配置"
               description="从「模型资源」中选择语音识别与语音合成。大模型、知识库与开场白由 FastGPT 应用提供，请前往 FastGPT 平台配置。"
             >
@@ -1642,7 +1669,7 @@ export function AssistantPage(props: AssistantPageProps) {
             </SectionCard>
 
             <SectionCard
-              icon={<Sparkles size={18} />}
+              icon={<Sparkles size={15} />}
               title="交互策略"
               description="设置实时视频对话时的交互体验"
             >
@@ -1704,10 +1731,10 @@ export function AssistantPage(props: AssistantPageProps) {
           </div>
         </div>
 
-        <div className="flex min-h-0 flex-1 gap-6">
-          <div className="scrollbar-subtle min-w-0 flex-1 space-y-5 overflow-y-auto pr-1">
+        <div className="flex min-h-0 flex-1 gap-4">
+          <div className="scrollbar-subtle min-w-0 flex-1 space-y-3 overflow-y-auto pr-1">
             <SectionCard
-              icon={<Terminal size={18} />}
+              icon={<Terminal size={15} />}
               title="OpenCode 服务配置"
               description="从「模型资源」中选择 OpenCode 服务资源。"
             >
@@ -1721,7 +1748,7 @@ export function AssistantPage(props: AssistantPageProps) {
             </SectionCard>
 
             <SectionCard
-              icon={<MessageSquareText size={18} />}
+              icon={<MessageSquareText size={15} />}
               title="提示词"
               description="描述助手的角色、能力和回答要求"
             >
@@ -1734,7 +1761,7 @@ export function AssistantPage(props: AssistantPageProps) {
             </SectionCard>
 
             <SectionCard
-              icon={<Brain size={18} />}
+              icon={<Brain size={15} />}
               title="模型与语音配置"
               description="配置 OpenCode 使用的大语言模型、语音识别与语音合成资源。"
             >
@@ -1779,7 +1806,7 @@ export function AssistantPage(props: AssistantPageProps) {
             </SectionCard>
 
             <SectionCard
-              icon={<Sparkles size={18} />}
+              icon={<Sparkles size={15} />}
               title="交互策略"
               description="设置实时视频对话时的交互体验"
             >
@@ -1843,10 +1870,10 @@ export function AssistantPage(props: AssistantPageProps) {
         }
       />
 
-      <div className="flex min-h-0 flex-1 gap-6">
-        <div className="scrollbar-subtle min-w-0 flex-1 space-y-5 overflow-y-auto pr-1">
+      <div className="flex min-h-0 flex-1 gap-4">
+        <div className="scrollbar-subtle min-w-0 flex-1 space-y-3 overflow-y-auto pr-1">
           <SectionCard>
-            <div className="grid grid-cols-1 gap-4 md:grid-cols-2">
+            <div className="grid grid-cols-1 gap-3 md:grid-cols-2">
               <div
                 role="button"
                 tabIndex={0}
@@ -1858,25 +1885,25 @@ export function AssistantPage(props: AssistantPageProps) {
                   }
                 }}
                 className={[
-                  "cursor-pointer rounded-2xl border p-5 text-left transition-colors",
+                  "cursor-pointer rounded-xl border p-3.5 text-left transition-colors",
                   form.runtimeMode === "pipeline"
                     ? "border-primary bg-primary/5 ring-1 ring-primary"
                     : "border-hairline bg-canvas-soft hover:border-hairline-strong",
                 ].join(" ")}
               >
                 <div className="flex items-center justify-between gap-3">
-                  <div className="flex items-center gap-3">
-                    <div className="flex h-10 w-10 shrink-0 items-center justify-center rounded-full bg-surface-strong text-foreground">
-                      <Waypoints size={18} />
+                  <div className="flex items-center gap-2.5">
+                    <div className="flex h-8 w-8 shrink-0 items-center justify-center rounded-full bg-surface-strong text-foreground">
+                      <Waypoints size={15} />
                     </div>
                     <div className="flex items-center gap-1.5">
-                      <span className="font-medium text-foreground">Pipeline 模式</span>
+                      <span className="text-sm font-medium text-foreground">Pipeline 模式</span>
                       <HelpHint text="通过 ASR、LLM 和 TTS 级联组成语音管线，灵活选配各模块。" />
                     </div>
                   </div>
                   {form.runtimeMode === "pipeline" && (
-                    <span className="flex h-6 w-6 shrink-0 items-center justify-center rounded-full bg-primary text-primary-foreground">
-                      <Check size={14} />
+                    <span className="flex h-5 w-5 shrink-0 items-center justify-center rounded-full bg-primary text-primary-foreground">
+                      <Check size={12} />
                     </span>
                   )}
                 </div>
@@ -1893,25 +1920,25 @@ export function AssistantPage(props: AssistantPageProps) {
                   }
                 }}
                 className={[
-                  "cursor-pointer rounded-2xl border p-5 text-left transition-colors",
+                  "cursor-pointer rounded-xl border p-3.5 text-left transition-colors",
                   form.runtimeMode === "realtime"
                     ? "border-primary bg-primary/5 ring-1 ring-primary"
                     : "border-hairline bg-canvas-soft hover:border-hairline-strong",
                 ].join(" ")}
               >
                 <div className="flex items-center justify-between gap-3">
-                  <div className="flex items-center gap-3">
-                    <div className="flex h-10 w-10 shrink-0 items-center justify-center rounded-full bg-surface-strong text-foreground">
-                      <AudioLines size={18} />
+                  <div className="flex items-center gap-2.5">
+                    <div className="flex h-8 w-8 shrink-0 items-center justify-center rounded-full bg-surface-strong text-foreground">
+                      <AudioLines size={15} />
                     </div>
                     <div className="flex items-center gap-1.5">
-                      <span className="font-medium text-foreground">Realtime 模式</span>
+                      <span className="text-sm font-medium text-foreground">Realtime 模式</span>
                       <HelpHint text="使用原生实时语音模型，模型直接处理音频输入并生成语音回复。" />
                     </div>
                   </div>
                   {form.runtimeMode === "realtime" && (
-                    <span className="flex h-6 w-6 shrink-0 items-center justify-center rounded-full bg-primary text-primary-foreground">
-                      <Check size={14} />
+                    <span className="flex h-5 w-5 shrink-0 items-center justify-center rounded-full bg-primary text-primary-foreground">
+                      <Check size={12} />
                     </span>
                   )}
                 </div>
@@ -1920,7 +1947,7 @@ export function AssistantPage(props: AssistantPageProps) {
           </SectionCard>
 
           <SectionCard
-            icon={<MessageSquareText size={18} />}
+            icon={<MessageSquareText size={15} />}
             title="提示词"
             description="描述助手的角色、能力和回答要求"
           >
@@ -1938,7 +1965,7 @@ export function AssistantPage(props: AssistantPageProps) {
 
           {form.runtimeMode === "pipeline" ? (
             <SectionCard
-              icon={<Brain size={18} />}
+              icon={<Brain size={15} />}
               title="模型配置"
               description="从「模型资源」中选择大语言模型、语音识别与语音合成"
             >
@@ -1983,7 +2010,7 @@ export function AssistantPage(props: AssistantPageProps) {
             </SectionCard>
           ) : (
             <SectionCard
-              icon={<Brain size={18} />}
+              icon={<Brain size={15} />}
               title="模型配置"
               description="当前模式下 ASR 与 TTS 由 Realtime 模型内置完成"
             >
@@ -1998,7 +2025,7 @@ export function AssistantPage(props: AssistantPageProps) {
           )}
 
           <SectionCard
-            icon={<Bot size={18} />}
+            icon={<Bot size={15} />}
             title="开场白"
             description="助手与用户首次对话时的开场语"
           >
@@ -2015,7 +2042,7 @@ export function AssistantPage(props: AssistantPageProps) {
 
           {form.runtimeMode === "pipeline" && (
             <SectionCard
-              icon={<Database size={18} />}
+              icon={<Database size={15} />}
               title="知识库配置"
               description="选择助手回答时可检索的业务知识来源"
             >
@@ -2041,7 +2068,7 @@ export function AssistantPage(props: AssistantPageProps) {
           )}
 
           <SectionCard
-            icon={<Wrench size={18} />}
+            icon={<Wrench size={15} />}
             title="工具"
             description="配置该提示词助手可以调用的工具"
           >
@@ -2053,7 +2080,7 @@ export function AssistantPage(props: AssistantPageProps) {
           </SectionCard>
 
           <SectionCard
-            icon={<Sparkles size={18} />}
+            icon={<Sparkles size={15} />}
             title="交互策略"
             description="设置实时视频对话时的交互体验"
           >
@@ -3377,29 +3404,6 @@ function EditableTitle({
   );
 }
 
-function HelpHint({ text }: { text: string }) {
-  return (
-    <Popover>
-      <PopoverTrigger asChild>
-        <button
-          type="button"
-          aria-label="查看说明"
-          onClick={(event) => event.stopPropagation()}
-          className="flex h-5 w-5 items-center justify-center rounded-full text-muted-soft transition-colors hover:bg-surface-strong hover:text-foreground"
-        >
-          <HelpCircle size={14} />
-        </button>
-      </PopoverTrigger>
-      <PopoverContent
-        align="start"
-        className="w-72 text-sm leading-6 text-muted-foreground"
-      >
-        {text}
-      </PopoverContent>
-    </Popover>
-  );
-}
-
 function DynamicVariableEditorHint({
   count,
   onOpen,
@@ -3657,45 +3661,6 @@ function DynamicVariablesDialog({
   );
 }
 
-function SectionCard({
-  icon,
-  title,
-  description,
-  children,
-}: {
-  icon?: React.ReactNode;
-  title?: string;
-  description?: string;
-  children: React.ReactNode;
-}) {
-  const hasHeader = Boolean(title);
-
-  return (
-    <Card className="rounded-2xl border-hairline bg-card text-card-foreground shadow-sm">
-      {hasHeader && (
-        <CardHeader>
-          <div className="flex items-center gap-3">
-            {icon && (
-              <div className="flex h-10 w-10 items-center justify-center rounded-full bg-surface-strong text-foreground">
-                {icon}
-              </div>
-            )}
-
-            <div className="flex items-center gap-1.5">
-              <CardTitle className="text-base font-medium">{title}</CardTitle>
-              {description && <HelpHint text={description} />}
-            </div>
-          </div>
-        </CardHeader>
-      )}
-
-      <CardContent className={hasHeader ? "space-y-4" : undefined}>
-        {children}
-      </CardContent>
-    </Card>
-  );
-}
-
 function TextAreaField({
   label,
   value,
@@ -3712,7 +3677,7 @@ function TextAreaField({
   return (
     <label className="block">
       {label && (
-        <div className="mb-2 text-sm font-medium text-foreground">{label}</div>
+        <div className="mb-1.5 text-sm font-medium text-foreground">{label}</div>
       )}
       <Textarea
         value={value}
@@ -3721,7 +3686,7 @@ function TextAreaField({
         rows={rows}
         // Override ui/textarea's field-sizing-content so `rows` sets a real height
         // instead of collapsing to min-h-16 when the value is short.
-        className="field-sizing-fixed min-h-32 resize-y border-hairline-strong bg-background text-foreground placeholder:text-muted-soft"
+        className="field-sizing-fixed min-h-28 resize-y border-hairline-strong bg-background text-sm text-foreground placeholder:text-muted-soft"
       />
     </label>
   );
@@ -3747,7 +3712,7 @@ function ResourceSelectField({
   return (
     <div className="block">
       {label && (
-        <div className="mb-2 text-sm font-medium text-foreground">{label}</div>
+        <div className="mb-1.5 text-sm font-medium text-foreground">{label}</div>
       )}
 
       <Select
@@ -4056,18 +4021,18 @@ function ToggleRow({
     <div
       className={[
         "flex items-center justify-between border border-hairline bg-canvas-soft",
-        hasIcon ? "rounded-2xl p-5" : "rounded-xl p-4",
+        hasIcon ? "rounded-xl p-3.5" : "rounded-xl px-3.5 py-3",
       ].join(" ")}
     >
       <div>
         <div
           className={[
-            "flex items-center font-medium text-foreground",
-            hasIcon ? "gap-3" : "gap-1.5",
+            "flex items-center text-sm font-medium text-foreground",
+            hasIcon ? "gap-2.5" : "gap-1.5",
           ].join(" ")}
         >
           {icon && (
-            <span className="flex h-10 w-10 shrink-0 items-center justify-center rounded-full bg-surface-strong text-foreground">
+            <span className="flex h-8 w-8 shrink-0 items-center justify-center rounded-full bg-surface-strong text-foreground">
               {icon}
             </span>
           )}
@@ -4077,7 +4042,7 @@ function ToggleRow({
           </span>
         </div>
         {description && (
-          <div className="mt-1 text-sm text-muted-foreground">
+          <div className="mt-1 text-xs text-muted-foreground">
             {description}
           </div>
         )}

frontend/src/components/turn-config-editor.tsx

@@ -1,8 +1,9 @@
 "use client";
 
 import type { ReactNode } from "react";
-import { HelpCircle, Settings2 } from "lucide-react";
+import { Settings2 } from "lucide-react";
 
+import { HelpHint } from "@/components/editor/section-card";
 import { Input } from "@/components/ui/input";
 import { Switch } from "@/components/ui/switch";
 import {
@@ -13,11 +14,6 @@ import {
   DialogTitle,
   DialogTrigger,
 } from "@/components/ui/dialog";
-import {
-  Popover,
-  PopoverContent,
-  PopoverTrigger,
-} from "@/components/ui/popover";
 import {
   Select,
   SelectContent,
@@ -59,7 +55,7 @@ export function TurnConfigEditor({
     });
 
   return (
-    <div className="flex items-center justify-between gap-4 rounded-2xl border border-hairline bg-card p-4 shadow-sm">
+    <div className="flex items-center justify-between gap-3 rounded-xl border border-hairline bg-canvas-soft px-3.5 py-3">
       <div className="flex items-center gap-1.5">
         <span className="text-sm font-medium text-foreground">
           允许用户打断
@@ -72,7 +68,7 @@ export function TurnConfigEditor({
               aria-label="打开允许用户打断高级配置"
               className="flex h-5 w-5 items-center justify-center rounded-full text-muted-soft transition-colors hover:bg-surface-strong hover:text-foreground"
             >
-              <Settings2 size={14} />
+              <Settings2 size={13} />
             </button>
           </DialogTrigger>
           <DialogContent className="max-h-[calc(100vh-3rem)] overflow-y-auto sm:max-w-6xl lg:max-w-[88rem] lg:overflow-hidden">
@@ -161,29 +157,6 @@ function ConfigSection({ title, children }: { title: string; children: ReactNode
   );
 }
 
-function HelpHint({ text }: { text: string }) {
-  return (
-    <Popover>
-      <PopoverTrigger asChild>
-        <button
-          type="button"
-          aria-label="查看允许用户打断说明"
-          onClick={(event) => event.stopPropagation()}
-          className="flex h-5 w-5 items-center justify-center rounded-full text-muted-soft transition-colors hover:bg-surface-strong hover:text-foreground"
-        >
-          <HelpCircle size={14} />
-        </button>
-      </PopoverTrigger>
-      <PopoverContent
-        align="start"
-        className="w-72 text-sm leading-6 text-muted-foreground"
-      >
-        {text}
-      </PopoverContent>
-    </Popover>
-  );
-}
-
 function NumberField({ label, value, min, max, step, onChange }: { label: string; value: number; min: number; max: number; step: number; onChange: (value: number) => void }) {
   return (
     <label className="block space-y-2">

frontend/src/components/workflow/GenericNode.tsx

@@ -30,14 +30,24 @@ export function GenericNode({ id, type, data, selected }: NodeProps) {
   const preview = (nodeData.greeting || nodeData.prompt || nodeData.message || "")
     .toString()
     .trim();
+  const entryModeLabel = {
+    wait_user: "等待用户",
+    generate: "立即回复",
+    fixed_speech: "固定进入语",
+  }[nodeData.entryMode ?? "wait_user"];
+  const inheritsGlobal = nodeData.inheritGlobalConfig !== false;
   const meta = type === "agent"
-    ? [
-        nodeData.contextPolicy === "fresh" ? "独立上下文" : "继承上下文",
-        `${nodeData.toolIds?.length ?? 0} 工具`,
-        nodeData.knowledgeBaseId ? "知识库" : null,
-        nodeData.asrResourceId ? "独立 ASR" : null,
-        nodeData.ttsResourceId ? "独立 TTS" : null,
-      ].filter(Boolean)
+    ? inheritsGlobal
+      ? [entryModeLabel, "继承全局配置"]
+      : [
+          entryModeLabel,
+          "自定义配置",
+          nodeData.llmResourceId ? "独立 LLM" : null,
+          `${nodeData.toolIds?.length ?? 0} 工具`,
+          nodeData.knowledgeBaseId ? "知识库" : null,
+          nodeData.asrResourceId ? "独立 ASR" : null,
+          nodeData.ttsResourceId ? "独立 TTS" : null,
+        ].filter(Boolean)
     : type === "action" && nodeData.toolId
       ? ["确定性工具"]
       : [];

frontend/src/components/workflow/specs.ts

@@ -8,6 +8,7 @@ import type { NodeSpecDto } from "@/lib/api";
 export type WorkflowNodeType = "start" | "agent" | "action" | "handoff" | "end";
 export type ContextPolicy = "inherit" | "fresh";
 export type KnowledgeMode = "automatic" | "on_demand" | "disabled";
+export type AgentEntryMode = "wait_user" | "generate" | "fixed_speech";
 export type EdgeMode = "llm" | "expression" | "always";
 export type ExpressionOperator =
   | "eq"
@@ -25,11 +26,15 @@ export type WorkflowNodeData = {
   greeting?: string;
   prompt?: string;
   contextPolicy?: ContextPolicy;
+  inheritGlobalConfig?: boolean;
+  entryMode?: AgentEntryMode;
+  entrySpeech?: string;
   toolIds?: string[];
   knowledgeBaseId?: string;
   knowledgeMode?: KnowledgeMode;
   knowledgeTopN?: number;
   knowledgeScoreThreshold?: number;
+  llmResourceId?: string;
   asrResourceId?: string;
   ttsResourceId?: string;
   toolId?: string;
@@ -129,8 +134,14 @@ export type WorkflowGraph = {
   specVersion: 3;
   settings: {
     globalPrompt: string;
+    defaultLlmResourceId: string;
     defaultAsrResourceId: string;
     defaultTtsResourceId: string;
+    toolIds: string[];
+    knowledgeBaseId: string;
+    knowledgeMode: "automatic" | "on_demand";
+    knowledgeTopN: number;
+    knowledgeScoreThreshold: number;
   };
   nodes: Array<{
     id: string;
@@ -153,8 +164,14 @@ export function defaultGraph(): WorkflowGraph {
     settings: {
       globalPrompt:
         "你是一个友好、专业的语音助手。请使用简短、自然、适合口语表达的句子。",
+      defaultLlmResourceId: "",
       defaultAsrResourceId: "",
       defaultTtsResourceId: "",
+      toolIds: [],
+      knowledgeBaseId: "",
+      knowledgeMode: "automatic",
+      knowledgeTopN: 5,
+      knowledgeScoreThreshold: 0,
     },
     nodes: [
       {
@@ -174,10 +191,9 @@ export function defaultGraph(): WorkflowGraph {
           name: "Agent",
           prompt: "了解用户需求并提供清晰、准确的帮助。",
           contextPolicy: "inherit",
-          toolIds: [],
-          knowledgeMode: "disabled",
-          knowledgeTopN: 5,
-          knowledgeScoreThreshold: 0,
+          inheritGlobalConfig: true,
+          entryMode: "wait_user",
+          entrySpeech: "",
         },
       },
       {