configure system prompt with json

configs/route_sys_prompts.json

@@ -0,0 +1,8 @@
+{   // Prompt for router; manditory to say return as json for route_prompt; if not, there will be bugs
+    "route_prompt" : "Return a JSON object with 'step'.the value should be one of 'chat' or 'order' based on the user input",
+
+    // Prompt for tool branch
+    "tool_prompt" : "You must use tool to complete the possible task"
+    
+    // Optionally set chat_prompt to overwrite the system prompt from xiaozhi
+}

lang_agent/graphs/routing.py

@@ -7,6 +7,8 @@ from PIL import Image
 from io import BytesIO
 import matplotlib.pyplot as plt
 import jax
+import os.path as osp
+import commentjson
 
 from lang_agent.config import KeyConfig
 from lang_agent.tool_manager import ToolManager, ToolManagerConfig
@@ -34,9 +36,20 @@ class RoutingConfig(KeyConfig):
     base_url:str = "https://dashscope.aliyuncs.com/compatible-mode/v1"
     """base url; could be used to overwrite the baseurl in llm provider"""
 
+    sys_promp_json: str = None
+    "path to json contantaining system prompt for graphs; Will overwrite systemprompt from xiaozhi if 'chat_prompt' is provided"
+
     tool_manager_config: ToolManagerConfig = field(default_factory=ToolManagerConfig)
 
 
+    def __post_init__(self):
+        super().__post_init__()
+        if self.sys_promp_json is None:
+            self.sys_promp_json = osp.join(osp.dirname(osp.dirname(osp.dirname(__file__))), "configs", "route_sys_prompts.json")
+            logger.warning(f"config_f was not provided. Using default: {self.sys_promp_json}")
+        
+        assert osp.exists(self.sys_promp_json), f"config_f {self.sys_promp_json} does not exist."
+
 
 class Route(BaseModel):
     step: Literal["chat", "order"] = Field(
@@ -99,12 +112,16 @@ class RoutingGraph(GraphBase):
         self.chat_model = create_agent(self.llm, [], checkpointer=self.memory)
         self.tool_model = create_agent(self.llm, tool_manager.get_langchain_tools(), checkpointer=self.memory)
 
+        with open(self.config.sys_promp_json , "r") as f:
+            self.prompt_dict = commentjson.load(f)
+
 
     def _router_call(self, state:State):
         decision:Route = self.router.invoke(
             [
                 SystemMessage(
-                    content="Return a JSON object with 'step'.the value should be one of 'chat' or 'order' based on the user input"
+                    # content="Return a JSON object with 'step'.the value should be one of 'chat' or 'order' based on the user input"
+                    content=self.prompt_dict.get("route_prompt")
                 ),
                 self._get_human_msg(state)
             ]
@@ -138,6 +155,16 @@ class RoutingGraph(GraphBase):
         else:
             inp = state["inp"]
         
+        if self.prompt_dict.get("chat_prompt") is not None:
+            inp = {"messages":[
+                SystemMessage(
+                    # "You must use tool to complete the possible task"
+                    self.prompt_dict["chat_prompt"]
+                ),
+                *state["inp"][0]["messages"][1:]
+            ]}, state["inp"][1]
+
+
         out = self.chat_model.invoke(*inp)
         return {"messages": out}
 
@@ -145,9 +172,9 @@ class RoutingGraph(GraphBase):
     def _tool_model_call(self, state:State):
         inp = {"messages":[
             SystemMessage(
-                "You must use tool to complete the possible task"
+                # "You must use tool to complete the possible task"
+                self.prompt_dict["tool_prompt"]
             ),
-            # self._get_human_msg(state)
             *state["inp"][0]["messages"][1:]
         ]}, state["inp"][1]