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pingqiuandClaude Opus 4.6
1ca13143b6
VS-side evidence handler (QueryBlockPromotionEvidence) reads live blockvol.Status() + V2 core projection at call time. Fail-closed: no core projection → ineligible with reason "missing_engine_projection". Engine CommittedLSN used unconditionally when core present (no WALHeadLSN overstatement). Eligibility owned by local V2 engine, not master. Master-side selection (selectDurabilityFirstCandidate): durability-first ordering by CommittedLSN, tie-break WALHeadLSN then HealthScore. All ineligible → fail-closed, no promotion. Pluggable querier (BlockPromotionEvidenceQuerier) for T3 wiring. Proto messages added to volume_server.proto. gRPC transport binding pending proto regen on M01 — this commit delivers evidence semantics and selection substrate, not full end-to-end RPC closure. Phase 20 doc updated with T2-T5 reviewer packs and cross-task guardrails. 13 tests: live facts, core projection mode, fail-closed no-core, 4 gated modes, missing volume, epoch mismatch, CommittedLSN ordering, WALHeadLSN tie-break, HealthScore tie-break, all-ineligible, mixed collection. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>