[
  {
    "stage_index": 1,
    "name": "State Validation & Pre-step Hooks",
    "action_type": "setup",
    "description": "Check controller state (RUNNING, PAUSED, FINISHED, ERROR) and execute pre-turn hooks."
  },
  {
    "stage_index": 2,
    "name": "Agent Step Dispatch",
    "action_type": "dispatch",
    "description": "Call agent `step()` method to generate next Action from current State."
  },
  {
    "stage_index": 3,
    "name": "Action Execution via Runtime",
    "action_type": "code_modification",
    "description": "Pass Action to runtime environment (bash, browser, file edit) to produce Observation."
  },
  {
    "stage_index": 4,
    "name": "Event Stream Emission",
    "action_type": "output_validation",
    "description": "Emit Action and Observation events to event log; update state iteration counter."
  },
  {
    "stage_index": 5,
    "name": "Stuck Detection & Termination Gate",
    "action_type": "stop_evaluation",
    "description": "Check if agent is repeating commands or if finish conditions are met."
  }
]