Adds Appendix E (Canonical Byte-Layout Reference) — the single
byte-convention table the Binary Format companion imports — and closes
two pins (ObjectKind, ResolutionAction discriminant bytes) that were
golden-locked in code but absent from spec text. Audit follow-up:
completed the domain-tag registry (added canonical MUSCCONF/MUSCENVH and
non-canonical MUSCFNTM) and corrected golden-lock wording for the two
non-literal-byte anchors (BlobId, RationalTime).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Independent audit of b2f2e20 / a7adbdc. The canonical, document-state byte
layouts were already correct and golden-locked; this closes the one real
spec-vs-code gap (in the non-canonical layout namespace) and the smaller
doc/test gaps around it.
LayoutObjectId (item 2.6): the spec normatively stated the id "is derived ...
with MUSCLOID" and the ratification log / layout DECISIONS header called it
"pinned" -- but no code uses MUSCLOID (stable_layout_id and
manifestation_layout_id are untagged; synthesized_layout_id borrows MUSCCONF),
and MUSCLOID cannot even be constructed: DomainTag::from_bytes accepts only
built-ins or MUSCS-prefixed tags, so wiring it requires changing the frozen
determinism crate (out of scope for a spec pass, and the spec itself says
MUSCLOID is not a canonical system tag). Kept MUSCLOID as the pinned Track-A
target and made every artifact honest that the v0 code is provisional:
- spec: "is derived" -> "MUST be derived" (forward contract) + a note that
the prototype mints provisional ids; changelog "pinned" -> "specified ...
as the Track-A target".
- records: ratification-log line 2.6 and layout DECISIONS header/body now
state spec-pinned-but-code-provisional; stale "Pass 11 candidate 3"
pointer now cites the ratified requirement.
- provenance.rs comments name the MUSCLOID target and label the current
derivation provisional.
Other fixes:
- epiphany-core/DECISIONS.md: the Tuplet bullet still claimed degenerate
ratios are caught by runtime invariant 16 "since a Tuplet is a plain
struct" -- stale after the construction-time TupletRatio change. Rewritten.
- codec.rs: added degenerate_tuplet_ratio_is_rejected_on_decode, guarding
the TupletRatio::dec re-validation branch that no test exercised (the
constructor was tested, the decode path was not).
- spec: integrity-anomaly snippet kind.canonical_bytes() ->
to_canonical_bytes() (the actual method).
- ids.rs / reduce.rs: clarifying comments (ManifestId's intentional,
golden-locked document_id/generation duplication; compute_promotions
bucketing by voice == (staff_instance, original_voice) via Invariant 5).
Verification: cargo test --workspace (434 pass, +1), clippy --all-targets clean
(0 warnings), fmt clean; spec rebuilds (lualatex, 0 undefined refs, 254pp).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Spec-revision pass (architecture unchanged) converting the v0
implementation's provisional, golden-locked choices into ratified
core_spec.tex text, so durable byte layouts are fixed before the
next-phase build-outs. Worklist: spec/PASS11_WORKLIST.md; per-item
dispositions: spec/PASS11_RATIFICATION_LOG.md.
Adopt-and-pin (bytes): TypedObjectId 16-bit BE discriminant table
0..=27 (added the 5 variants the code carried); promoted-voice
(MUSCSVCE), synthetic-pitch (MUSCSPCH, tuning always in identity),
and integrity-anomaly (MUSCSANM, now a reserved built-in tag)
derivations; ChunkKind/ProfileId/CompressionAlgorithm discriminants;
ManifestId preimage (manifest_id excluded); RationalTime/scalar
layouts + the codec convention baseline the Binary Format companion
inherits.
Decide-and-pin: tempo Linear interpolates speed (not bpm);
StructuralFieldCollision tags the winner Conflicted; lifted the
>2-way / partial-overlap voice-promotion rule to normative; pinned
TransactionCategory and ObjectKind core vocabularies; added
ResolutionAction::Dismiss so the Dismissed state is reachable by an
authored op; pinned the (non-canonical) LayoutObjectId derivation
(MUSCLOID).
Fixes: blob hashing is bare MUSCBLOB||payload (deleted the
contradictory "identically to chunks" phrasing); equal-generation
superblock rule (DivergentSameGeneration); defined ProfileConstraints
with the required RetentionPolicy + first-declared precedence; made
the DVV zero-based floor normative; reconciled the invariant count to
19 and named the three construction-time MUSTs — TupletRatio now
rejects degenerate ratios at construction (zero term or
actual==notated), enforced by a checked constructor + codec decode
validation.
Code changes carry regression tests; byte-layout golden tests now
cite their ratified requirements. Workspace green: cargo test, clippy
-D warnings, fmt; spec builds (lualatex, 253pp). Per-crate DECISIONS
files annotated with the ratification status.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011giSRaHCFCGm1Z2SWv6JHt
Levi Neuwirth