[
  {
    "stage_index": 1,
    "name": "Edge Case Taxonomy Prompting",
    "action_type": "setup",
    "description": "Prompt model to identify tricky algorithmic constraints (off-by-one, negative values, duplicates)."
  },
  {
    "stage_index": 2,
    "name": "Test Case Synthesis",
    "action_type": "test_generation",
    "description": "Generate JSON-structured test cases with input strings and expected outputs."
  },
  {
    "stage_index": 3,
    "name": "Validation via Independent Oracle",
    "action_type": "output_validation",
    "description": "Verify synthetic tests against naive or brute-force oracle where feasible."
  },
  {
    "stage_index": 4,
    "name": "Deduplication & Test Registry",
    "action_type": "stop_evaluation",
    "description": "Filter redundant test cases and register final curated test suite."
  }
]