{
  "schema": "MAKNOW_FLR017_LAB_CASES_v1",
  "cases": [
    {
      "id": "baseline_safe",
      "api_version": "2026-01-01",
      "contract_expectation": "v1",
      "contract_observation": "v1",
      "status_code": 200,
      "quota_usage_pct": 35,
      "retry_after_ms": null,
      "compatibility_probe": "MATCH",
      "version_state": "SUPPORTED",
      "fallback_qualified": true,
      "closure_contract_ok": true,
      "closure_provider_ok": true
    },
    {
      "id": "quota_429",
      "api_version": "2026-01-01",
      "contract_expectation": "v1",
      "contract_observation": "v1",
      "status_code": 429,
      "quota_usage_pct": 100,
      "retry_after_ms": 250,
      "compatibility_probe": "MATCH",
      "version_state": "SUPPORTED",
      "fallback_qualified": true,
      "closure_contract_ok": true,
      "closure_provider_ok": false
    },
    {
      "id": "drift_200",
      "api_version": "2026-01-01",
      "contract_expectation": "v1",
      "contract_observation": "v2_semantic_break",
      "status_code": 200,
      "quota_usage_pct": 40,
      "retry_after_ms": null,
      "compatibility_probe": "MISMATCH",
      "version_state": "SUPPORTED",
      "fallback_qualified": false,
      "closure_contract_ok": false,
      "closure_provider_ok": true
    },
    {
      "id": "transient_503",
      "api_version": "2026-01-01",
      "contract_expectation": "v1",
      "contract_observation": "v1",
      "status_code": 503,
      "quota_usage_pct": 42,
      "retry_after_ms": 800,
      "compatibility_probe": "MATCH",
      "version_state": "SUPPORTED",
      "fallback_qualified": true,
      "closure_contract_ok": true,
      "closure_provider_ok": false
    },
    {
      "id": "retired_version",
      "api_version": "2025-01-01",
      "contract_expectation": "v1",
      "contract_observation": "unsupported_version",
      "status_code": 400,
      "quota_usage_pct": 20,
      "retry_after_ms": null,
      "compatibility_probe": "UNSUPPORTED_VERSION",
      "version_state": "RETIRED",
      "fallback_qualified": true,
      "closure_contract_ok": false,
      "closure_provider_ok": true
    },
    {
      "id": "conflicting_unknown",
      "api_version": "2026-01-01",
      "contract_expectation": "v1",
      "contract_observation": "unverified",
      "status_code": 429,
      "quota_usage_pct": null,
      "retry_after_ms": null,
      "compatibility_probe": "UNKNOWN",
      "version_state": "UNKNOWN",
      "fallback_qualified": false,
      "closure_contract_ok": false,
      "closure_provider_ok": false
    },
    {
      "id": "transfer_lower_quota",
      "api_version": "2026-01-01",
      "contract_expectation": "v1",
      "contract_observation": "v1",
      "status_code": 429,
      "quota_usage_pct": 100,
      "retry_after_ms": 1200,
      "compatibility_probe": "MATCH",
      "version_state": "SUPPORTED",
      "fallback_qualified": true,
      "closure_contract_ok": true,
      "closure_provider_ok": true
    },
    {
      "id": "transfer_503_after_quota_recovery",
      "api_version": "2026-01-01",
      "contract_expectation": "v1",
      "contract_observation": "v1",
      "status_code": 503,
      "quota_usage_pct": 45,
      "retry_after_ms": 700,
      "compatibility_probe": "MATCH",
      "version_state": "SUPPORTED",
      "fallback_qualified": true,
      "closure_contract_ok": true,
      "closure_provider_ok": true
    }
  ]
}