models.py

from pydantic import Field
from typing import Optional, List
from openenv.core.env_server import Action, Observation

class MyEnvV4Observation(Observation):
    """What the Agent sees."""
    sender: str
    subject: str
    body: str
    headers: List[str]
    echoed_message: str = "" # Required by sample inference script contract

class MyEnvV4Action(Action):
    """What the Agent chooses."""
    message: str = Field(..., description="Action string: 'INBOX', 'SPAM', or 'QUARANTINE'")