{
  "development": "2026-04-01T00:00:00Z/2026-04-10T00:00:00Z",
  "test": "2026-04-10T00:00:00Z/2026-04-15T00:00:00Z",
  "group": "account and period; one authored event stays in one split",
  "service_principals": "AssumedRole actors are modeled separately from IAM users",
  "history": "before/after and burst counts use only earlier events"
}