Public source validation / validate (push) Failing after 3m8s
519 B
519 B
ADR 0008 — Stale or missing required telemetry is Unknown
Status: Accepted baseline
Decision
When required telemetry is unavailable beyond its freshness policy, Pulse reports Unknown rather than retaining or inferring Healthy.
Rationale
False green status is more dangerous than explicit uncertainty.
Consequences
- Responses carry freshness metadata.
- Alert rules define unknown behavior.
- UI shows last known value only with age.
- Tests inject stale/missing sources throughout the product.