Levi Neuwirth d93baac3ba Agent K M2d review follow-up: harden the Group-4 score-settings ops ... Address the five-finding review of M2d (1e4ab24) plus the two-finding follow-up review; all fixes are code/test/doc only, no spec change needed (the catalog/core-spec already classify metadata as advisory LWW). - SetMetadata is now a true advisory LWW: it silently last-writer-wins in canonical order and records no conflict, matching operation_catalog §set-user-system-break. Dropped the StructuralFieldCollision, the `last_metadata` working slot, and the `env` parameter; rewrote the conflict test as `concurrent_differing_set_metadata_is_advisory_lww` (no conflict, state stays clean, permutation-independent resolution). - SetMetricGrid / SetUserPageBreak / SetUserSystemBreak share a new `layout_region_slot` precondition backed by a `staff_based_regions` index: the target must be live and staff-based (FreeGraphic regions have neither a metric-grid nor a break slot). The index is read from base-free state, so reduce() and reduce_onto() reach the same verdict for missing, tombstoned, and FreeGraphic regions. - SetMetricGrid now rejects a grid whose meter_sequence names an undeclared time signature, rather than installing an invariant-violating grid. - User breaks materialize under the canonical LWW key: `apply_break_lww` drops any existing anchor resolving to the same position before adding, so the graph break list stays in lockstep with the resolved-position ledger map (shared `resolved_anchor_position`). Applied to page and system breaks alike. - Coverage: SetMetadata/SetMetricGrid/CreateVoice/DeleteVoice added to the tag-distinctness test; layout_stub `gen_operation_kind_tag` extended to every normative tag; the MaterializedState decode test populates page_breaks; four direct regression tests pin each fixed bug; the stale SetMetadata/score_metadata doc comments now say advisory LWW. Gates: build/fmt/clippy -D warnings clean; cargo test --workspace green (533); conformance_suite scale 1 passes. Stages only core/ops/testkit; the unrelated Agent-I working tree is left untouched. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>		2026-06-25 21:45:51 -04:00
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anomaly.rs	Phase 2 (Agent K) M1: value-typed operation payloads + Operation Catalog scaffold	2026-06-24 11:52:02 -04:00
causal.rs	Pass 11: ratify provisional byte choices into normative spec text	2026-06-21 22:30:06 -04:00
conflict.rs	Pass 11: consolidated byte-layout appendix + pin ObjectKind/ResolutionAction discriminants	2026-06-22 13:16:20 -04:00
decode.rs	Agent K M2d (Group 4): score-settings operations	2026-06-25 19:26:31 -04:00
effect.rs	Agent K M2c (Group 3): structural container CRUD operations	2026-06-25 18:10:15 -04:00
encode.rs	A B C D F	2026-06-19 12:42:31 -04:00
envelope.rs	Phase 2 (Agent K) M1: value-typed operation payloads + Operation Catalog scaffold	2026-06-24 11:52:02 -04:00
fuzz.rs	Agent K M2d (Group 4): score-settings operations	2026-06-25 19:26:31 -04:00
lib.rs	Agent K M2d (Group 4): score-settings operations	2026-06-25 19:26:31 -04:00
migrate.rs	Agent K M2d (Group 4): score-settings operations	2026-06-25 19:26:31 -04:00
opset.rs	Phase 2 (Agent K) M1: value-typed operation payloads + Operation Catalog scaffold	2026-06-24 11:52:02 -04:00
payload.rs	Agent K M2d review follow-up: harden the Group-4 score-settings ops	2026-06-25 21:45:51 -04:00
reduce.rs	Agent K M2d review follow-up: harden the Group-4 score-settings ops	2026-06-25 21:45:51 -04:00
slot.rs	A B C D F	2026-06-19 12:42:31 -04:00
stamp.rs	A B C D F	2026-06-19 12:42:31 -04:00
support.rs	Pass 11 follow-up: golden-lock the ratified discriminant tables; fix three spec-text inaccuracies	2026-06-22 09:22:55 -04:00
undo.rs	A B C D F	2026-06-19 12:42:31 -04:00
v0.rs	Agent K M2d (Group 4): score-settings operations	2026-06-25 19:26:31 -04:00
valuegen.rs	Agent K M2d review follow-up: harden the Group-4 score-settings ops	2026-06-25 21:45:51 -04:00