{
  "levels": {
    "1": {
      "name": "Boundary Probing",
      "description": "Edge cases and boundary conditions",
      "qa_focus": ["null_values", "empty_collections", "max_min_values", "type_boundaries"],
      "developer_scope": "haiku",
      "escalation_on_fail": false
    },
    "2": {
      "name": "Mutation Analysis",
      "description": "Code mutation to verify test completeness",
      "qa_focus": ["operator_mutations", "condition_inversions", "return_value_changes"],
      "developer_scope": "haiku",
      "escalation_on_fail": false
    },
    "3": {
      "name": "Behavioral Contracts",
      "description": "Pre/post conditions and invariants",
      "qa_focus": ["precondition_violations", "postcondition_checks", "invariant_preservation"],
      "developer_scope": "haiku",
      "escalation_on_fail": true
    },
    "4": {
      "name": "Security Adversary",
      "description": "Adversarial security testing",
      "qa_focus": ["injection_attacks", "auth_bypass", "privilege_escalation", "data_exposure"],
      "developer_scope": "senior_software_engineer",
      "escalation_on_fail": true
    },
    "5": {
      "name": "Production Chaos",
      "description": "Production-like failure scenarios",
      "qa_focus": ["network_failures", "resource_exhaustion", "race_conditions", "cascading_failures"],
      "developer_scope": "senior_software_engineer",
      "escalation_on_fail": true
    }
  },
  "progression": {
    "default_start": 1,
    "max_level": 5,
    "pass_to_advance": true,
    "fail_behavior": {
      "levels_1_2": "retry_with_feedback",
      "levels_3_4_5": "escalate_if_fail"
    }
  },
  "routing": {
    "level_1_2_pass": "advance_level",
    "level_1_2_fail": "developer_retry",
    "level_3_4_5_pass": "advance_level",
    "level_3_4_5_fail": "escalate_to_senior_software_engineer"
  },
  "_metadata": {
    "version": "1.0.0",
    "description": "5-level test challenge progression for QA Expert",
    "last_updated": "2025-11-25",
    "notes": [
      "Levels 1-2: Basic tests, developer can retry on Haiku",
      "Levels 3-5: Advanced tests, escalate to Senior Software Engineer on fail",
      "Level 4-5 always require Senior Software Engineer scope"
    ]
  }
}