The string-literal workaround was added before the Artist model existed (ARCH-09 prerequisite). With the model now landed (RFC-TIMETABLE v0.2 Session 1), resolve to Artist::class directly so morph-map registration matches the rest of the registry. MorphMapAlignmentTest still green. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>