{"schema":"experiment-report.v1","plan":{"id":"wonder-entrance-01","registeredAt":1792720800000,"minPerArm":4361,"confidence":0.95,"srmAlpha":0.001,"arms":[{"name":"control","weight":1},{"name":"entrance","weight":1}],"primary":{"metric":"returned","better":"higher"},"guardrails":[{"metric":"park_opened","better":"higher","tolerance":0.03}]},"plans":["wonder-entrance-01","payoff-day-01"],"generatedAt":"2026-10-25T12:41:38.282Z","status":"collecting","note":"no cohort with a closed return window yet (cohorts through 2026-10-10 count)","cohortsThrough":"2026-10-10"}