Land the two real pre-passes as canonical *derived annotations* (pure
functions of the materialized Score + profile, recomputed on
materialization, never serialized into canonical Score bytes), exposed via
`derive_annotations`:
- Spelling: a Temperley-style line-of-fifths centre-of-gravity preference
rule (key-free, deterministic), preserving authored CMN letters and only
inferring spelling for chromatic/integer input. `resolve_spelling`
layers authored overrides above the inferred default (the RespellPitch
precedence rule). `spell` now takes `&Pitch` and delegates to
`simplest_spelling`.
- Decomposition: metric greedy-aligned splitting on a 1/4096 integer grid
(barline + dyadic-boundary ties), with exact sounding->notated tuplet
conversion before gridding. Components reconstruct the event duration
(invariant 15).
- A per-event-kind eligibility `TaxonomyReport` so "ineligible" is always
explicit and counted, never silently absent.
Test infrastructure (Agent F): a 29-fixture representative corpus +
taxonomy harness (corpus.rs), the H spelling/decomposition merge gate
(prepass_harness.rs), a discrete `tests/prepass.rs` CI target, conformance
stage [7b], a dedicated CI job, and the Pass-12 batch tracker.
Review hardening folded in (nine findings):
- Guard `decompose_metric` against a zero-length measure (was a
divide-by-zero panic; now reported ungriddable).
- Resolve spelling-override priority via `Reverse` instead of negation
(was an i32::MIN overflow).
- Verify spelling *register* (octave), not just pitch class, in the gate.
- Close the decomposition under-emission gap: the unusual-outcome
taxonomy buckets are an exact per-fixture whitelist (classify_corpus
step 5b).
- Generalize `accidental_ids` to a glyph stack so authored extreme
alterations (triple-sharp+) reconstruct exactly instead of being clamped.
- Per-fixture spread checks in the non-vacuity tripwire and broad-bucket
coverage, so no single rich fixture can carry a signal (partial-stub
resistance); added a `mixed_rhythm` fixture for margin.
- Pin the integer-grid note-value math to the canonical rational helpers
via an exhaustive test; cross-reference comments.
- Replace the O(n^2) tuplet innermost-resolution scan with an id index.
fmt + clippy -D warnings clean; 199 tests pass; conformance suite green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011giSRaHCFCGm1Z2SWv6JHt
M1 — fix Agent C framework defects, tests-first:
- causal ordering: topologically order DVV edges instead of assuming HLC
alone implies causal order (false for adversarial remote envelopes);
HLC only breaks ties among ready operations.
- anomaly cutoff: quarantine from the earliest counter participating in
any violating HLC pair (suffix-minima), e.g. [100,200,50] quarantines
from counter 0, not counter 1.
- pending detection: DVV contiguous ranges use the zero-based per-replica
counter floor; first absent id in any asserted range holds the dependent
pending (vector coverage, not only dots).
- transaction snapshots: rollback removes member-generated conflicts.
- edge tests in concurrent_reduction.rs for all six audited cases.
M2 — reduce onto Agent B's real score graph:
- OperationSet::reduce_onto(&Score) -> GraphMaterialization { state, score }
mutates the real arena, voices, regions, tombstones, indexes, and
cross-cutting structures; base-free reduce() retained.
- VoiceOrigin::SystemPromoted now carries { winning_operation,
losing_operation, original_voice }; spec and Invariant 18 updated.
- graph-aware migration, forward undo, system breaks, promotion pre-pass.
- tests/graph_reduction.rs: 11 tests asserting check_invariants is clean,
plus a 64-seed order-independence sweep.
Pass-11 spec decisions resolved (blocking subset): DVV floor (P11-C7),
HLC-vs-causality, promoted-voice derivation inputs (P11-C4 / core P11-3).
Payload/Score canonical encoding remain deferred to the companion docs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Levi Neuwirth