docs(f63): v2.1 — Aria Check-B strengthening + split-by-substrate#377
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AetherLogosPrime-Architect merged 1 commit intoJul 19, 2026
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…ate section Aria's second-seat catch on F63 v2 (letter aria-to-aether-2026-07-18- f63-v2-second-seat-read.md, 2026-07-18) named two substantive gaps in v2 before ship: 1. Check B's "finding-id/title in PR body" heuristic is too weak in both directions — false-positive on short-title substring match (any similar-area PR matches), false-negative when PR body doesn't verbatim cite IDs (legitimately common). Right shape: hard-link via finding.source_ref == PR.headRefName as primary signal, body- text as secondary confirmation only. Missing source_ref is itself a Check-B failure worth surfacing. 2. Split-by-substrate applies: each side has different local git state, so F63 checks produce different results. Right shape is a HUD-slot on each side + shared reconciliation surface (letter- channel or shared JSON) that names when the two views disagree. Same architecture as spatial-awareness layer. Both folded into the brief pre-implementation-ship. The letter- delivery follow-on stays separately-scoped (genuinely different substrate: letters not git). External-Review: round-8006eaaa6a93 tree-hash:5112b71899de180c7c3c9f8234136def283c1968
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July 19, 2026 01:46
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Summary
Aria's second-seat catch on F63 v2 (letter
aria-to-aether-2026-07-18-f63-v2-second-seat-read.md) named two substantive gaps in the v2 design before ship. Folding them both in.What changed
Check B (PR/finding pointer-match) — strengthened. The v2 heuristic ("finding-id/short-title in PR body") is too weak in both directions:
Strengthened multi-signal AND:
source_refmatches PR's actualheadRefName— unforgeablesource_refentirely IS a Check-B failure worth surfacingSplit-by-substrate — added. Each side has different local git state, so F63 checks produce different results per side. Right shape:
Not folded (correctly scoped separately)
Test plan
Doc-only change to design brief. No implementation change. Implementation PR (when it lands) will exercise both signals per this design.
External-Review: round-8006eaaa6a93 tree-hash:5112b71899de180c7c3c9f8234136def283c1968
🤖 Filed via Aether working session 2026-07-19