{
  "schema_version": "evaluation-zero.before-after.v1",
  "rehearsal_id": "evaluation-zero-fixture-2026-09-01",
  "first_party_marking": "first-party evaluation rehearsal — not A2-M2 evidence",
  "data_nature": "fixture",
  "pack_version": "packdb.genai-evaluation-pack.v1",
  "fixture_version": "packdb.smoke-genai-fixture.v1",
  "query_id": "prompt_config_version_comparison",
  "query_fingerprint": "q:d5ce0f6e61c19462",
  "columns": [
    "prompt_name",
    "prompt_version",
    "config_version",
    "request_model",
    "operations",
    "error_rate",
    "p95_duration_ns",
    "mean_output_tokens"
  ],
  "rows": [
    {
      "prompt_name": "smoke-prompt",
      "prompt_version": "3",
      "config_version": "cfg-7",
      "request_model": "smoke-model-1",
      "operations": 1,
      "error_rate": 0,
      "p95_duration_ns": 1000000000,
      "mean_output_tokens": 45
    }
  ],
  "note": "A before/after comparison needs at least two prompt or config versions in the window. The fixture supplies 1, and 4 of 5 operations carry no prompt version at all — so this is a coverage gap in the telemetry, not a verdict that the versions perform the same.",
  "interpretation_boundary": "Version identity and fixture measurements only; no prompt body, causal claim, or operational verdict."
}