Adding support for system, prompt and answe templates

src/crewai/agent.py

@@ -121,6 +121,15 @@ class Agent(BaseModel):
     callbacks: Optional[List[InstanceOf[BaseCallbackHandler]]] = Field(
         default=None, description="Callback to be executed"
     )
+    system_template: Optional[str] = Field(
+        default=None, description="System format for the agent."
+    )
+    prompt_template: Optional[str] = Field(
+        default=None, description="Prompt format for the agent."
+    )
+    response_template: Optional[str] = Field(
+        default=None, description="Response format for the agent."
+    )
 
     _original_role: str | None = None
     _original_goal: str | None = None
@@ -167,7 +176,9 @@ class Agent(BaseModel):
                 self.llm.callbacks = []
 
             # Check if an instance of TokenCalcHandler already exists in the list
-            if not any(isinstance(handler, TokenCalcHandler) for handler in self.llm.callbacks):
+            if not any(
+                isinstance(handler, TokenCalcHandler) for handler in self.llm.callbacks
+            ):
                 self.llm.callbacks.append(token_handler)
 
         if not self.agent_executor:
@@ -296,7 +307,13 @@ class Agent(BaseModel):
                 "request_within_rpm_limit"
             ] = self._rpm_controller.check_or_wait
 
-        prompt = Prompts(i18n=self.i18n, tools=tools).task_execution()
+        prompt = Prompts(
+            i18n=self.i18n,
+            tools=tools,
+            system_template=self.system_template,
+            prompt_template=self.prompt_template,
+            response_template=self.response_template,
+        ).task_execution()
 
         execution_prompt = prompt.partial(
             goal=self.goal,
@@ -304,7 +321,13 @@ class Agent(BaseModel):
             backstory=self.backstory,
         )
 
-        bind = self.llm.bind(stop=[self.i18n.slice("observation")])
+        stop_words = [self.i18n.slice("observation")]
+        if self.response_template:
+            stop_words.append(
+                self.response_template.split("{{ .Response }}")[1].strip()
+            )
+
+        bind = self.llm.bind(stop=stop_words)
         inner_agent = agent_args | execution_prompt | bind | CrewAgentParser(agent=self)
         self.agent_executor = CrewAgentExecutor(
             agent=RunnableAgent(runnable=inner_agent), **executor_args

src/crewai/agents/executor.py

@@ -40,6 +40,9 @@ class CrewAgentExecutor(AgentExecutor):
     have_forced_answer: bool = False
     force_answer_max_iterations: Optional[int] = None
     step_callback: Optional[Any] = None
+    system_template: Optional[str] = None
+    prompt_template: Optional[str] = None
+    response_template: Optional[str] = None
 
     @root_validator()
     def set_force_answer_max_iterations(cls, values: Dict) -> Dict:
@@ -113,6 +116,7 @@ class CrewAgentExecutor(AgentExecutor):
         # Allowing human input given task setting
         if self.task.human_input:
             self.should_ask_for_human_input = True
+
         # Let's start tracking the number of iterations and time elapsed
         self.iterations = 0
         time_elapsed = 0.0
@@ -128,8 +132,10 @@ class CrewAgentExecutor(AgentExecutor):
                     intermediate_steps,
                     run_manager=run_manager,
                 )
+
                 if self.step_callback:
                     self.step_callback(next_step_output)
+
                 if isinstance(next_step_output, AgentFinish):
                     # Creating long term memory
                     create_long_term_memory = threading.Thread(
@@ -292,7 +298,6 @@ class CrewAgentExecutor(AgentExecutor):
                         tool=tool_calling.tool_name,
                         tools=", ".join([tool.name.casefold() for tool in self.tools]),
                     )
-
             yield AgentStep(action=agent_action, observation=observation)
 
     def _ask_human_input(self, final_answer: dict) -> str:

src/crewai/utilities/prompts.py

@@ -1,4 +1,4 @@
-from typing import Any, ClassVar
+from typing import Any, ClassVar, Optional
 
 from langchain.prompts import BasePromptTemplate, PromptTemplate
 from pydantic import BaseModel, Field
@@ -11,12 +11,11 @@ class Prompts(BaseModel):
 
     i18n: I18N = Field(default=I18N())
     tools: list[Any] = Field(default=[])
+    system_template: Optional[str] = None
+    prompt_template: Optional[str] = None
+    response_template: Optional[str] = None
     SCRATCHPAD_SLICE: ClassVar[str] = "\n{agent_scratchpad}"
 
-    def task_execution_without_tools(self) -> BasePromptTemplate:
-        """Generate a prompt for task execution without tools components."""
-        return self._build_prompt(["role_playing", "task"])
-
     def task_execution(self) -> BasePromptTemplate:
         """Generate a standard prompt for task execution."""
         slices = ["role_playing"]
@@ -24,12 +23,42 @@ class Prompts(BaseModel):
             slices.append("tools")
         else:
             slices.append("no_tools")
-        slices.append("task")
-        return self._build_prompt(slices)
 
-    def _build_prompt(self, components: list[str]) -> BasePromptTemplate:
+        slices.append("task")
+
+        if not self.system_template and not self.prompt_template:
+            return self._build_prompt(slices)
+        else:
+            return self._build_prompt(
+                slices,
+                self.system_template,
+                self.prompt_template,
+                self.response_template,
+            )
+
+    def _build_prompt(
+        self,
+        components: list[str],
+        system_template=None,
+        prompt_template=None,
+        response_template=None,
+    ) -> BasePromptTemplate:
         """Constructs a prompt string from specified components."""
-        prompt_parts = [self.i18n.slice(component) for component in components]
-        prompt_parts.append(self.SCRATCHPAD_SLICE)
-        prompt = PromptTemplate.from_template("".join(prompt_parts))
+        if not system_template and not prompt_template:
+            prompt_parts = [self.i18n.slice(component) for component in components]
+            prompt_parts.append(self.SCRATCHPAD_SLICE)
+            prompt = PromptTemplate.from_template("".join(prompt_parts))
+        else:
+            prompt_parts = [
+                self.i18n.slice(component)
+                for component in components
+                if component != "task"
+            ]
+            system = system_template.replace("{{ .System }}", "".join(prompt_parts))
+            prompt = prompt_template.replace(
+                "{{ .Prompt }}",
+                "".join([self.i18n.slice("task"), self.SCRATCHPAD_SLICE]),
+            )
+            response = response_template.split("{{ .Response }}")[0]
+            prompt = PromptTemplate.from_template(f"{system}\n{prompt}\n{response}")
         return prompt