The nine type bodies fill to the ratified Ch5 shapes and the wire moves
to the Binary Format §Schema Major 2 layouts, review-hardened (high-
effort review; 8 findings, 7 fixed + 1 deferral sharpened).
epiphany-core:
- 19 new leaf types in graph.rs (SlurKind/CurveDirection/
CurvatureOverride/SpanStyle/LineStyle/SpaceUnit/SubBeam/
BeamGeometryOverride/SpannerKind+5 payload types/RepeatKind/Volta/
StaffBracketKind/MetadataEntry/MetadataValue/Timestamp/
SoundConfiguration/TranspositionInterval/UnpitchedMember) with the
ratified discriminants (cstyle_enum_codec! reused; tagged unions
hand-written); nine struct fills appended in wire order.
- The frozen wire forms generalized to a SHARED sub-codec layer
(enc_/dec_*_v1, v0==v1 for every type major 2 changed; vec framing
through enc_/dec_vec_v1) used by the new decode_v1_score/
encode_v1_score AND the rerouted v0 pair — major 2 touched types the
v0 walk had treated as unchanged (metadata, staves, cross_cutting,
staff instances transitively). Strict-canonical guards on every
versioned path; decode_canonical_versioned dispatches {0,1,2} with
composed default-fill migration.
- Invariants extended to the new reference-bearing fields (REVIEW
FIX): Beam.sub_beams events, RepeatKind DaCapo/DalSegno anchors,
Volta spans now covered by CrossCuttingRefsResolve + the anchor
model walk, with negative tests.
- Tests: v1 migration size-anchor (v1 omits exactly the appended
default bytes — the frozen encoder cannot drift), a non-default
round-trip covering every new field and every SpannerKind/RepeatKind
wire arm, fuzzer corpus gains genuine-v1 forms + the major-2 seam
with enforced must-decode-Ok on unmutated frozen forms.
epiphany-ops + epiphany-bundle (Phase C's semantic core, landed here
deliberately — the live codec flip makes CrossCutting/Staff/Metadata
payload bytes v2 immediately; shimming nine transitively-embedded
types the major-1 D1 way was throwaway):
- Minimal-stamping OperationKind::schema_major per the ratified rule
(CrossCutting/CreateStaff/SetMetadata always 2; CreateRegion 2 iff a
carried instance bears Some(staff_lines_override) else 1;
CreateStaffInstance/SetStaffLayout 2 iff Some else 0), unit-locked.
- Bundle op-block accept-set [0,2]; SchemaVersion::V2;
beyond-accept-set tests moved to major 3; testkit V2
stamp-derivation test.
- the_canonical_base_is_byte_identical_across_data_model_majors:
pinned blake3 of a seeded reduction — the companion's SHOULD that
the canonical base never moves across data-model majors.
- The op-payload migrate-on-read deferral restated precisely in
DECISIONS (no consumer byte-reconstructs op payloads today; the
first one must bring per-type frozen payload decoders).
Zero golden churn (fixtures deliberately carry v2 defaults).
Instrument::new consolidates the sweep's default fills. Full gate:
fmt, clippy -D warnings, rustdoc -D warnings, 30 workspace suites,
conformance scale 1 (8/8).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NEs4aYiu8MXjdYdMxw8PTd
Levi Neuwirth
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