Write and review Musi compiler/runtime diagnostics. Use when changing diagnostic enums, messages, labels, hints, fix-its, renderer output, diagnostic tests, or any user-facing compiler error wording in crates such as music_base, music_syntax, music_resolve, music_sema, music_session, musi_project, music_emit, musi_vm, or tooling/LSP diagnostic surfaces.
2026-04-18