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REX-07: day-0 shadow lane: 4B lane as non-voting 4th quorum lane on gx10, writes review-ledger-v1 #4362
Closed as not planned
Description
owner: rex
Epic: #4354 (REX-001). Spec: docs/specifications/review-experiment-protocol.md §7 row REX-07.
Done when (all must hold): contract review-ledger-v1: 100% of quorums after activation carry a shadow row; planted gx10-down leaves width 3 and writes Unknown{LaneUnavailable}
Binding: §6 R-1..R-12, §8 STOPs. Ticket id = PMAT-.
Activity
REX-07: review-ledger-v1 rows + shadow-lane coverage check (Refs #4362)
roadmap: PMAT-4362 fragment — REX-07 Ask 2 (served weights sha256) sc…
roadmap: aggregate PMAT-4362 fragment, Refs #4362
docs(audits): quorum 3/3 PASS for #4252/#4362 served-weights sha256, …
noahgift commentedon Oct 4, 2026
Folded into #4354 as a checklist line (ISSUE-TREE-001: a family of rows becomes one parent with checklist lines). Work and status are tracked there. aprender-wtix-even