{
  "mutation_id": "MIRRORED_UVS",
  "source_fixture": "baseline_fixture.json",
  "changes": [
    {
      "path": "uv.overlap_observation",
      "from": "NO_UNINTENDED_OVERLAP_OBSERVED_IN_SYNTHETIC_CHECK",
      "to": "INTENTIONAL_MIRRORED"
    }
  ],
  "unchanged_governing_fields": [
    "target.uv_overlap_policy=UNIQUE_REQUIRED"
  ],
  "learner_task": "Identify the target-policy conflict or justify a target-policy change; do not treat mirroring as universally invalid."
}