Append-only snapshots
Each snapshot is computed at request time from immutable event tables. Historical values are never rewritten.
Reproducible from archive
Every metric is derivable from the underlying decision and outcome records. If a value cannot be reproduced, it is not displayed.
Denominators visible
Ratio metrics always carry their numerator, denominator, and observation window. A percentage without its sample is treated as meaningless.
Honest degradation
If upstream data is missing or stale, the metric is shown as Pending or Stale, never inferred or smoothed.
Volume-resistant
No metric improves automatically as signal volume increases without a corresponding quality constraint.
Forward-compatible naming
Names, definitions, and time windows are aligned with internal reporting so they remain stable for future investor reporting.