fix: createAgent issue (#639)

Co-authored-by: Shubham Naik <shub@memgpt.ai>

letta/schemas/agent.py

@@ -95,8 +95,8 @@ class CreateAgent(BaseModel, validate_assignment=True):  #
     name: str = Field(default_factory=lambda: create_random_username(), description="The name of the agent.")
 
     # memory creation
-    memory_blocks: List[CreateBlock] = Field(
-        ...,
+    memory_blocks: Optional[List[CreateBlock]] = Field(
+        None,
         description="The blocks to create in the agent's in-context memory.",
     )
     # TODO: This is a legacy field and should be removed ASAP to force `tool_ids` usage
@@ -129,6 +129,7 @@ class CreateAgent(BaseModel, validate_assignment=True):  #
     context_window_limit: Optional[int] = Field(None, description="The context window limit used by the agent.")
     embedding_chunk_size: Optional[int] = Field(DEFAULT_EMBEDDING_CHUNK_SIZE, description="The embedding chunk size used by the agent.")
     from_template: Optional[str] = Field(None, description="The template id used to configure the agent")
+    template: bool = Field(False, description="Whether the agent is a template")
     project: Optional[str] = Field(None, description="The project slug that the agent will be associated with.")
     tool_exec_environment_variables: Optional[Dict[str, str]] = Field(
         None, description="The environment variables for tool execution specific to this agent."