- wristband.Server.Metadata is a compiling 501 stub; TestPhase8RedMetadata
asserts the exact unwrapped PHP metadata document, headers and status and
fails with the PHASE8_RED:metadata sentinel (D-06)
- scripts/check-phase8-red.sh implements the shared go/shell RED contract
for the rest of Phase 8: exact selected test/package failure plus sentinel,
rejecting unrelated fail actions, compile/setup failures, panics,
malformed JSON, missing/duplicate sentinels and zero selection (D-04/D-18)
