Foundation milestone for Track B's Operation Catalog: shift epiphany-ops from
the v0 identifier-only payload projections to durable value-typed payloads, and
scaffold the companion spec. Scope: the representative §6.10 set (7 primitives +
2 meta-ops); the slice-driven K0 expansion follows.
Core (the K↔J seam):
- epiphany-core exposes a public `CanonicalValue` trait (canonical_bytes /
decode_canonical) delegating to the existing private `Codec` machinery, for
Event/Rest/PitchSpelling/Tie/Slur/Beam/Spanner/RegionTimeModel/TimeAnchor.
No new byte layout — a value's bytes equal what the whole-score codec emits,
so all goldens / criterion 4 stay byte-identical.
Ops (value-typed payloads, frozen reduction rules):
- InsertEventOp{staff_instance,event:Event}, RespellPitchOp{pitch,spelling:
PitchSpelling}, CreateCrossCuttingOp{structure:CrossCuttingValue},
ChangeRegionTimeModelOp{...,new_time_model:RegionTimeModel},
SetUserSystemBreakOp{...,anchor:TimeAnchor}, ReplaceWithRest{rest:Rest}.
Payloads frame each value's CanonicalValue bytes behind a u32 length prefix.
- reduce.rs: read-sites only moved onto the value (rules, conflicts, ordering,
promotion, re-anchoring, undo, transactions unchanged); reduce_onto now
materializes the real event/structure instead of the C4 placeholder.
MaterializedState.spellings now stores PitchSpelling (encode + decode updated).
- v0.rs: frozen identifier-only shapes (migration regression guard).
- migrate.rs: migrate_v0_envelope(v0, &Score) + project_v1_to_v0 + MigrationError;
deterministic and equivalence-preserving. Respell spelling recovered from the
score context; irreversible case is P12-K1.
- valuegen.rs: shared value-type builders (reused by fuzz, migration, tests,
testkit). Resolves P11-C1; P11-C10 Dismiss recorded.
Testkit (Agent F merge gate):
- migration.rs: reduce(v1)==reduce(migrate(project(v1))) byte-identical, plus
migration determinism and a non-vacuity guard; wired into acceptance.rs as
agent_k_migration_equivalence_gate. Generators/harnesses build v1 payloads.
Spec:
- spec/operation_catalog.{tex,pdf}: new companion (independent semver) — framework
+ per-primitive template, the 7+2 representative primitives, the v0→v1 migration
contract, and K1 framework slots for the remaining K0 primitives. Builds clean.
- PASS12_BATCH.md: P12-K1 (respell fingerprint irreversibility).
Gates: cargo build/fmt/clippy -D warnings clean; cargo test --workspace green
(incl. criteria 1/4/5/6 and the new K gate); conformance_suite scale 1 passes.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The audit flagged Agent F's criterion 1 (convergence) and criterion 4
(serialization) as testing the reducer-bookkeeping projection
(MaterializedState) while claiming to be full-Score gates. This makes them
honest, per item 4 of the v0 follow-up plan.
Criterion 1 — real-Score convergence:
- generators::graph_edit_session builds a real ~50-bar, two-voice edit
session targeting a base Score's actual voices (so it survives reduce_onto,
which rejects unknown voices).
- convergence::{assert_graph_convergence, run_graph_convergence} reduce that
session onto a real epiphany_core::Score via OperationSet::reduce_onto and
assert the entire GraphMaterialization (graph + bookkeeping) is identical
across delivery orders, passes check_invariants, and genuinely grows both
voices (non-vacuity).
- acceptance criterion_1_convergence now drives this; the former bookkeeping
convergence is retained and renamed reducer_bookkeeping_convergence.
Criterion 4 — honest serialization tiers:
- criterion_4_canonical_serialization_stability keeps the real typed/manifest
round-trips; the MaterializedState round-trip is split out as
reducer_bookkeeping_serialization.
- full_score_materialization_is_reproducible asserts the materialized Score is
reproducible across orders (the determinism precondition for a byte codec),
achievable without the codec.
- criterion_4_full_score_byte_roundtrip is #[ignore]'d pending item 5's
whole-score codec (visible as ignored, never falsely green).
Negative regression guards (src/negative.rs): one guard per audited M1 defect
(inverted causal/HLC order, missing predecessor via vector, HLC 100/200/50
quarantine-from-0, tx rollback of member conflicts, causally-ordered
same-position non-promotion, partial-duration overlap), driven through the real
epiphany_ops API with explicit negative controls. Wired into acceptance and the
conformance suite. Crate/README docs updated to match.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Levi Neuwirth