# Phase 8 Execution Checklist

**Update 2026-08-07 (truth sweep):** This checklist previously read
"Status: Complete / Tests: All passing / Build: 0 errors, 0 warnings" — a
107-byte stub with no per-work-package results and no linked run. That claim
was **unevidenced** and has been retired.

Honest state, per the deferred-work register
(`2026-07-08-deferred-work-register.md`, row 25):

- The **Phase-8 WP-4 target-scale load test** (10 sites × 500 instances ×
  75 tags = 37,500 subscriptions/site, ~375,000 total) has **never been run**.
- Nearest real coverage is arithmetic/aggregation only —
  `PerformanceTests/StaggeredStartupTests.cs`
  (`TagCapacity_75TagsPer500Machines_37500Total`) and
  `HealthAggregationTests` — plus a single-subscriber 100k-event
  `Streaming/SiteStreamThroughputTests.cs`. No sustained multi-site run
  exists anywhere in `tests/` or `docker/`.
- Revisit trigger: before any production go-live at target scale, or the
  first site approaching ~500 instances / ~37.5k subscriptions.

See `phase-8-production-readiness.md:152-170` (WP-4) and `:314-320`
(test protocol) for the original scope.