Tranche 3 completes ScoreTuningContext onto the wire -- schema major 3, the only
irreversible tranche. Split reversible-first: 3a builds the accidental / glyph /
engraving type surface in memory with a real consumer (so the shapes are
exercised while free to change), 3b freezes them. 3a adds no Codec, no wire
movement; the hand codec keeps encoding exactly three wire fields while
accidental_extensions and smufl join overrides as in-memory-only.
Scoping the subtree surfaced three types that freeze forever and the spec does
not pin -- filed as S10-S12, ratified before dispatch (the S5/S7-before-tranche-1
pattern):
- S10: PitchSpaceModification::Cents(f64) is a raw f64 in canonical state, which
the byte layer cannot encode -- serialize.rs decodes floats only through
CanonicalF64::from_le_bytes. Ratified Cents(CanonicalF64), the same maneuver
Ruling D applied to the bounding box.
- S11: AnchorPoint is referenced (:3166) and defined nowhere; core cannot depend
on layout-ir. Ratified core-native { x, y: SpaceUnit } plus a normative frame
sentence, since the box it anchors is "relative to the glyph's anchor point".
- S12: the catch. SmuflVersion is NOT undefined -- it exists in layout-ir with
LITERAL minor ({1,4}) and derived Ord, so 1.3 sorts before 1.12 today, and it
is a field of GlyphCatalogIdentity (conformance identity). Ratified
fraction-normalized minor_centi (1.4 -> 40); core defines it in 3a, and 3b
unifies layout-ir onto it and moves GlyphCatalogIdentity deliberately.
Every citation and struct line-ref verified against core_spec.tex before commit.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Levi Neuwirth
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