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feat(multiplayer): export bounded API metrics

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Josh Creek
2026-09-01 17:06:38 +01:00
parent d85c8b8194
commit f1b8366531
7 changed files with 217 additions and 5 deletions
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multiplayer-next.md
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@@ -1442,3 +1442,5 @@ The same allocation path now carries the matcher-selected playlist, preventing a
The Godot control-plane client now retains the exact last idempotent mutation and exposes `retry_last_mutation()` for transport, timeout, rate-limit, and 5xx failures. Retries reuse the original idempotency key and expected revision, while 401 and 409 responses remain non-retryable; the harness covers the policy boundary. This closes the local duplicate-action recovery mechanism for heartbeat/cancel/proposal calls, with broader live UI retry verification still remaining.
The matchmaking UI now exposes that retained replay through its existing action button as `Retry Request` while a heartbeat, cancellation, or proposal action has a retryable failure. Terminal, authentication, and revision-conflict paths remain ineligible, so the button cannot issue a stale blind command.
The control plane now exports bounded Prometheus-compatible API request counters and latency summaries at `GET /metrics`, with fixed operation/status labels and no event-stream wrapping. Production and testkit services wire the collector; adversarial tests verify unknown paths cannot inject label cardinality or leak URL secrets, and full Go/race/vet checks pass. Durable SLO dashboards and alert routing remain operational work.