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byrongamatosandClaude Sonnet 4.6
e230629770
Move all ~770-line T-section functions (chordWireHighDensity, chordTemplateLabel,
chordTemplateMarkedArpeggio, chordHandShapeArpeggioHint, mergeHandShapeSynthChords,
mergeChordShape, inferArpeggioFromNotePattern, chordShapeCoveredByStandaloneNotes,
hsStart, hsEnd, handShapeChartSpanSec, fillArpeggioGhostInferFlags,
arpeggioChordIdForNoteWithInferCache, arpHsBoundsForNote, fillLaneRailHandShapeFlags,
fillArpeggioRailShapeBoundsCaches, arpeggioLaneOuterRailLaneSlice,
arpeggioLaneOuterRailAtChartTime, arpeggioLaneDividerFrameAccentMul,
arpeggioLaneDividerXYScaleMatchFrameRim) into a createArp({}) factory.
DI surface: 19 params — 18 plain const shorthand + 1 live getter (getNStr).
lowerBoundT imported directly from ./geometry.js (not DI'd).
NEXT_ON_STRING_T_EPS was found during ALL_CAPS grep after initial survey and
added as param 19.
Structural fix: _resetStringDependentCaches() remains in screen.js; exports
resetChordShapeCache() so screen.js can reset _chordShapeCache without reaching
into arp.js internals. DI rewire: arpeggioLaneDividerXYScaleMatchFrameRim uses
getNStr() instead of bare nStr (the live let var).
Test coverage (tests/js/highway_3d_arp.test.js — 19 tests):
- Module shape, 21-export return object, lowerBoundT direct import
- DI param surface (NEXT_ON_STRING_T_EPS, getNStr getter)
- Screen.js wiring: import, T-section body gone, destructure callsite
- Wiring-correspondence guard (PINNED_RENAMES = {}, naming-class invariant)
- Amendment 2: resetChordShapeCache identity kill (gut reset → r3 === r1 → RED)
- Amendment 3: WeakMap re-keying guard (same-ref hit, new-ref recompute)
- Behavioral kills: mergeChordShape, mergeHandShapeSynthChords, chordWireHighDensity,
chordTemplateLabel, arpeggioLaneDividerXYScaleMatchFrameRim DI check
Also updates highway_3d_arp_deferral.test.js to look in src/arp.js for
chordShapeCoveredByStandaloneNotes (moved out of screen.js by this cut).
plugin.json: 3.47.0 → 3.48.0
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014uZ169yfoFYArXz962g7KW