Test 139

The Mosaic scope decision is complete. Hema approved a bounded metrics-router response, not a pipeline rewrite: keep the global queue capped at 2,048 batches, limit each tenant to 64 pending batches, and send additional work into the existing retryable backpressure path before acceptance. Wes owns implementation and load-test evidence; I own cross-service invariants and any future production-window opening decision; Cyrus and Roman own rollup-service capacity and parity evidence; Nadia owns queue and refusal alert semantics. Any stage must stop if queue-wait p99 exceeds 400 ms for five consecutive minutes, retryable queue-full responses exceed 0.5% for five consecutive minutes, any accepted batch is lost, or any consistency, parity, dropped-series, route, or full-health check leaves baseline. The formal service owner map is unchanged, Wes does not become metrics-router primary, Mosaic’s forecast ramp has not begun, and nothing is running in production yet. Update the September 3 Mosaic preparation brief into the final decision record, then post the bounded summary to #infra.

The scheduled Mosaic Commerce capacity-observation window is complete. The full health set was at baseline, so Wes made the fresh opening decision as metrics-router primary. Live traffic reached 17.2 million data points per minute. Queue-wait p99 reached 302 milliseconds, retryable queue-full responses reached 0.14%, and the highest tenant reached 60 pending batches. The diagnostic reconciled every accepted batch to exactly one terminal result with no accepted batch lost. Consistency, parity, dropped-series, route, shard-keeper lease, rollup-service, and full-health checks all remained at baseline, so no stop condition was reached. Wes made no configuration change or rollback, and I didn’t take over the ordinary metrics-router decision. The tenant-bounded control remains fully enabled and unchanged. The broader scale-response cycle remains open until the mapped group reviews the staged and production evidence together on January 22. Update the existing “Mosaic Commerce capacity-observation window” event and replace the current contents of “Mosaic capacity response — cycle remains open after October 7 review” with the exact January 20 production evidence and current status. Then post the bounded result to #infra, stating that the control remained unchanged, no stop condition occurred, and the broader cycle remains open pending the January 22 evidence review.

The January 22 evidence review with Hema, Wes, Cyrus, Roman, Nadia, and me is complete. We reviewed the qualifying 90-minute staged replay at 19.78 million data points per minute alongside the January 20 production observation at 17.2 million data points per minute. In production, every accepted batch reached exactly one terminal result and none was lost; queue-wait p99 reached 302 milliseconds, retryable queue-full responses reached 0.14%, the highest tenant reached 60 pending batches, and all consistency, parity, dropped-series, route, shard-keeper lease, rollup-service, and full-health checks remained at baseline. We closed the Mosaic scale-response cycle without another queue design, configuration change, or production push. No capacity-related production window remains open. The production control is unchanged: a global queue of 2,048 batches, a limit of 64 pending batches per tenant, and retryable pre-acceptance backpressure for excess work. Wes remains the routine metrics-router decision-maker; I remain backup and review triggered cross-service invariant or failure-mode exceptions. For any later forecast above 17.2 million data points per minute, the mapped owners must first complete a fresh 90-minute replay at 15% above that forecast using its tenant distribution, batch-size distribution, and burst pattern. It qualifies only if queue-wait p99 does not exceed 400 milliseconds for five consecutive minutes, retryable queue-full responses do not exceed 0.5% for five consecutive minutes, no tenant exceeds 64 pending batches, no accepted batch is lost, and all required checks remain at baseline throughout. Update the existing “Mosaic Commerce capacity evidence review” event with the final decision, replace “Mosaic capacity response — cycle remains open after October 7 review” with the complete final closeout record titled “Mosaic capacity response — final closeout,” and post the bounded final result to #infra.