Closes P13-S12. epiphany-layout-ir defined its own SmuflVersion storing the
minor LITERALLY ({1,4} for SMuFL 1.4), so derived Ord sorted 1.3 and 1.4
BEFORE 1.12 — backwards versus SMuFL's real release order — on a direct field
of GlyphCatalogIdentity, which is layout-conformance identity. That bug was
live. The crate graph fixes the direction: layout-ir depends on core, so
core's fraction-normalized minor_centi type is necessarily the survivor.
layout-ir deletes its own and re-exports core's, keeping
epiphany_layout_ir::SmuflVersion resolving for downstream at zero churn.
No wire change: no schema major, no Codec, no decode vector. LayoutCache is a
regenerable major-0 role. The one line that moves bytes is encode_catalog's
.minor -> .minor_centi (04 00 -> 28 00 at offset 2, verified by encoding a
default identity: 60 bytes, unchanged elsewhere).
The tranche also closes S12's OTHER half, which had gone unnoticed: the
ratified shape reached Rust and the binary companion but core_spec.tex never
defined SmuflVersion at all — the exact "undefined leaf" S12 was filed about.
It is now declared once, with the hundredths rule as normative prose and the
release table as a rationale note, cross-referenced from both Chapter 9 sites
so the glyph catalog's version and the tuning context's are visibly one type.
No new req: label; counts stay 212/282/282.
Two ledger claims corrected, both verified false before dispatch rather than
after: PASS13_CANDIDATES.md's S12 entry and epiphany-core/DECISIONS.md's S12
bullet both promised this move would land "with golden regen". Nothing is
pinned to the catalog identity — every ResolvedLayoutIR::canonical_bytes()
assertion is RELATIVE (stability, determinism, and a sensitivity check that
mutates metrics_hash, never smufl_version), and the committed SVG/PNG goldens
embed no identity, only a fixed comment string. There was nothing to
regenerate, and conformance gate [9] never moved.
The fix is locked by a test that names the bug: layout-ir asserts the real
release order through GlyphCatalogIdentity.smufl_version. Mutation-verified
independently by making from_decimal store one-digit minors literally — it
fails with "minor_centi: 20 did not sort before minor_centi: 3", which is
precisely the deleted type's behaviour.
Gate: fmt clean, clippy 0, 1283 passed / 0 failed (+1, the new test), doc 0,
conformance 8/8, requirement labels 6/6 at 212/282/282. No golden, vector,
baseline, or editor-track file changed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Levi Neuwirth
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