Freshness and alert service levels
Published 2026-10-11 (v1). These are the declared service levels for this measurement publication.
Measurement cadence
The measurement cycle runs daily at 03:30 UTC by system timer. Each cycle manifest records its trigger, input hashes, resolved production source heads, vantage, and record counts.
Data freshness
Published figures are computed from the current edition measurement window, named on every page (current window: 2026-10-06). A page that cannot verify its own dates refuses to build (fail-first stale-date gate).
Misses and repairs
A cycle that misses its schedule, or completes with a repair, is recorded with cause and disposition the same day; the miss list of unmeasured hostnames is published per edition (current miss list) and regenerates with every build.
Alert service level
Material regressions discovered by a cycle (a previously measured hostname going dark, a gate refusal, a provenance mismatch) are investigated within one business day and disclosed in the next edition or immediately via the proof directory, whichever is sooner.
Independence
Every published figure is recomputed by an independent Truth pass from the raw cycle records; adversarial QC reviews each material claim before publication. A figure that cannot be recomputed is withdrawn, never patched.