error budget audit derived

{
  "input": {
    "body": {
      "intervals": [
        {
          "good": 7000,
          "start": "2026-09-07T00:00:00Z",
          "total": 7000
        },
        {
          "good": 6965,
          "start": "2026-09-14T00:00:00Z",
          "total": 7000
        },
        {
          "good": 6997,
          "start": "2026-09-21T00:00:00Z",
          "total": 7000
        },
        {
          "good": 6998,
          "start": "2026-09-28T00:00:00Z",
          "total": 7000
        }
      ],
      "objective": "99.9",
      "window_days": 28
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "limits": {
        "maxLines": 20000,
        "maxSpans": 10000,
        "maxFields": 500,
        "maxSamples": 20000,
        "maxFindings": 500,
        "maxJsonBytes": 2097152
      },
      "passed": false,
      "complete": true,
      "findings": [
        {
          "code": "BUDGET_EXHAUSTED",
          "detail": "40 failed events against a budget of 28, which is 142.857% of it. The objective is already breached for this window."
        },
        {
          "code": "OBJECTIVE_NOT_MET",
          "detail": "The measured success rate is 99.857142% against an objective of 99.900000%."
        },
        {
          "code": "SEVERE_BURN_INTERVAL",
          "detail": "The interval starting 2026-09-14T00:00:00.000Z burns budget at 20.00 times the sustainable rate. At that rate the whole window budget is gone in 33.60 hours."
        }
      ],
      "intervals": [
        {
          "bad": 0,
          "good": 7000,
          "start": "2026-09-07T00:00:00.000Z",
          "total": 7000,
          "burn_rate": "0.000",
          "success_rate": "1.000000"
        },
        {
          "bad": 35,
          "good": 6965,
          "start": "2026-09-14T00:00:00.000Z",
          "total": 7000,
          "burn_rate": "20.000",
          "success_rate": "0.995000"
        },
        {
          "bad": 3,
          "good": 6997,
          "start": "2026-09-21T00:00:00.000Z",
          "total": 7000,
          "burn_rate": "1.714",
          "success_rate": "0.999571"
        }
      ],
      "bad_events": 40,
      "request_id": "example-request",
      "service_id": "error_budget_audit",
      "assumptions": [
        "Every figure is exact decimal arithmetic over integers. A success rate of 99.95% against an objective of 99.9% is a difference in the fourth decimal place, and comparing those as floating point is how...",
        "Intervals are sorted by their start, so the order supplied does not change the answer, and a timestamp with no UTC offset is reported because the ordering would then rest on a guess.",
        "A burn rate is the budget consumed in an interval relative to the share of the window that interval represents, so a rate above one means the budget runs out before the window does."
      ],
      "good_events": 27960,
      "limitations": [
        "The counts supplied. Whether good and total were measured correctly, and whether the indicator reflects user experience, are outside this.",
        "within_budget is true only when the objective is met, the budget is not mostly consumed and every interval was readable. It is not a prediction about the rest of the window."
      ],
      "observed_at": "2026-10-02T00:00:00.000Z",
      "window_days": 28,
      "not_examined": [],
      "total_events": 28000,
      "budget_events": 28,
      "finding_count": 3,
      "within_budget": false,
      "interval_count": 4,
      "service_version": "1.0.0",
      "achieved_percent": "99.857142",
      "findings_by_code": {
        "BUDGET_EXHAUSTED": 1,
        "OBJECTIVE_NOT_MET": 1,
        "SEVERE_BURN_INTERVAL": 1
      },
      "objective_percent": "99.900000",
      "budget_consumed_fraction": "1.428571"
    }
  }
}