{
  "compare_id": "example-weekly-compare",
  "study_spec_path": "study.example.json",
  "window_selector": {
    "trace_type": "chat",
    "date_prefix": "2026-03-2",
    "slot_token": "1000"
  },
  "baseline": {
    "config_patch": {
      "env_patch": {},
      "flag_patch": {}
    }
  },
  "tuned": {
    "trial_ref": {
      "study_root": "/abs/path/to/.aituner-tight/example-study",
      "trial_id": "trial-0004"
    }
  }
}