board: record PR #1248 merged — arc entry + LATEST_STATE - #1249
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Post-merge hygiene for #1248 (NodeRow::edges is byte-backed). Prepends the PR_ARC_INVENTORY entry (Added / Retyped / Doctrine / Locked / Source-breaking / Deferred / Review / CI / Confidence) and the LATEST_STATE merged-PR entry that regrades the 2026-09-18 (2) contract-inventory delta from in-PR to on-main. Hygiene-only: no type, plan, deliverable, epiphany or code. Per the termination clause this PR itself owes no arc entry. Post-checks: both ledgers grew (7372->7438, 4440->4460; zero deleted lines); citation-decay --since a2a5101: 0 new; supersession index regenerated after the board writes, byte-identical. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HScwwezRdMxFfTs3WLG19d
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📝 WalkthroughWalkthroughThe pull request adds board documentation for PR ChangesEdgeFacet migration records
Priority: ⬇️ Low Estimated code review effort: 1 (Trivial) | ~3 minutes Change: Other Suggested reviewers: Merge Risk: 🔵 Low · up to The migration record could mislead downstream users about which 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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In @.claude/board/PR_ARC_INVENTORY.md:
- Around line 6-7: Narrow the compatibility statement for the EdgeBlock alias to
note that only the shown in-tree uses remain compatible, specifically default(),
byte access, equality, and Copy. Remove the claim that EdgeBlock preserves all
FacetCascade call sites, and state that FacetCascade-specific fields such as
facet_classid and tiers and methods absent from EdgeFacet are not compatible.
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) The entry said the alias "keeps every call site compiling". Verified against the source: EdgeFacet is a byte newtype (as_bytes / as_bytes_mut / from_bytes / to_bytes / facet(), plus From/Into), so FacetCascade's public facet_classid and tiers fields — and any method not on EdgeFacet — do not resolve through the alias. The in-tree call sites survive because they use default(), byte access, equality and Copy; that is what the claim should have said. Restated as: the alias keeps the IN-TREE call sites compiling, and the narrower surface is the point of the retype rather than an oversight — an out-of-tree caller reaching for a FacetCascade field gets a compile error and names the projection (edges.facet().facet_classid), which is already covered under Source-breaking-documented-not-versioned. Wording only; no type, code or doctrine change. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HScwwezRdMxFfTs3WLG19d
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Post-merge hygiene for #1248 (
NodeRow::edgesis byte-backed, mergeda2a51012). Two prepends, nothing else:PR_ARC_INVENTORY.md— the contract: edges is byte-backed — bytes are stored, integers are projected #1248 entry: Added (EdgeFacet, the two-superpower falsifier, the alias doctest) / Retyped (NodeRow::edges) / Doctrine (bytes are stored, integers are projected) / Locked (thetarget_endianguard stays, narrowed — the correction to mask-risc: Pred::Range; canonical_node: EdgeBlock is a FacetCascade (the second 16 bytes are just another content-blind facet) #1246's claim) / Source-breaking-documented-not-versioned (with the reasons CodeRabbit accepted) / Deferred / Review / CI (including the struckprotoccaveat) / Confidence.LATEST_STATE.md— the merged-PR entry that regrades the 2026-09-18 (2) contract-inventory delta from in-PR to on-main, and names what is unchanged after it (ISS-EDGE-BLOCK-WAS-A-SECOND-TYPE-FOR-THE-SAME-FACET,TD-JC-CLIPPY-RED-ON-BASE-2).Hygiene-only. No type, plan, deliverable, epiphany or code — per the termination clause this PR owes no arc entry of its own.
Post-checks: both ledgers grew (7372→7438, 4440→4460), zero deleted lines;
citation_decay.py --since a2a51012: 0 new (145 backlog, not failing); supersession index regenerated after the board writes, byte-identical.🤖 Generated with Claude Code
https://claude.ai/code/session_01HScwwezRdMxFfTs3WLG19d
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