Implement Planning (#267)

* add outline of agent

* add plan class

* add initial prompt

* plumb plan through a bit

* refactor state management

* move task into state

* fix errors

* add prompt parsing

* add task actions

* better serialization

* more serialization hacks

* fix fn

* fix recursion error

* refine prompt

* better description of run

* update prompt

* tighter planning mechanism

* prompt tweaks

* fix merge

* fix lint issues

* add error handling for tasks

* add graphic for plans

* remove base_path from file actions

* rename subtask to task

* better planning

* prompt updates for verification

* remove verify field

* ruff

* mypy

* fix actions

agenthub/codeact_agent/codeact_agent.py

@@ -70,12 +70,12 @@ class CodeActAgent(Agent):
 
     def step(self, state: State) -> Action:
         if len(self.messages) == 0:
-            assert state.task, "Expecting instruction to be set"
+            assert state.plan.main_goal, "Expecting instruction to be set"
             self.messages = [
                 {"role": "system", "content": SYSTEM_MESSAGE},
-                {"role": "user", "content": state.task},
+                {"role": "user", "content": state.plan.main_goal},
             ]
-            print(colored("===USER:===\n" + state.task, "green"))
+            print(colored("===USER:===\n" + state.plan.main_goal, "green"))
         updated_info = state.updated_info
         if updated_info:
             for prev_action, obs in updated_info: