[
  {
    "stage_index": 1,
    "name": "Extract Pull Request / Git Diff",
    "action_type": "inspection",
    "description": "Inspect `git diff HEAD~1` or uncommitted working tree changes."
  },
  {
    "stage_index": 2,
    "name": "Run Clean Test Suite",
    "action_type": "output_validation",
    "description": "Execute pytest or language-specific test runner against the modified codebase."
  },
  {
    "stage_index": 3,
    "name": "Static Analysis & Linter Run",
    "action_type": "verification",
    "description": "Execute ruff, flake8, or mypy to ensure type safety and PEP8 compliance."
  },
  {
    "stage_index": 4,
    "name": "Verdict Generation",
    "action_type": "stop_evaluation",
    "description": "Issue APPROVE if tests and linters pass cleanly; otherwise issue REJECT with exact error list."
  }
]