Insert a new note in the selected pitch's voice, immediately after its event: a
fresh single-note event (InsertEvent) at the next musical position, in the same
voice, copying the selected pitch and its rhythmic value. The selection stays on
the anchor. This completes the insert work begun by the chord-add — both anchor
on the selection, since the click-empty-space-to-position inverse is not in the
hit-test seam yet.
Fresh EventId minting reuses the three-source high-water-mark basis of pitch
minting (base, current score, op log), so event ids are never reused either.
Every reducer rejection is pre-checked so the edit refuses cleanly instead of
appending a dead, non-materializing op: voice overlap (InsertSlotOccupied,
mirroring the reducer's interval test), a non-metric region or non-positive
duration (resolved together with the staff instance, requiring
RegionTimeModel::Metric), and an authored spelling override on the copied pitch
(PitchSpellingOverridden — the raw-value copy would drop the override and render
differently). Refusals are early returns before minting/apply, so the op log and
id counters are untouched; tests assert the log does not grow across a refusal.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NAtEiJtt9yKVV1zjKYmZhS
Levi Neuwirth
6a8de4bdea