{
  "mutation_id": "D3D001-MUT-MOBILE",
  "base_fixture": "D3D001-BASELINE-HS-01",
  "changed_fields": {
    "target.target_use": "REALTIME_MOBILE_PREVIEW",
    "target.target_constraint_scope": "CONSTRAINED_NAMED_TARGET_ONLY",
    "target.geometry_budget_policy.max_triangles": 6000
  },
  "learner_task": "Recompute affected evidence and state; do not copy baseline."
}