Addresses 3 blockers and 2 warnings:
BLOCKER 1: Plan 02 now depends on Plan 01 (wave: 2, depends_on: ["14-01"])
BLOCKER 2: Task 1 in Plan 02 now verifies existing getMusicNotationUrl
instead of creating it; rest.js removed from files_modified
BLOCKER 3: Plan 01 Task 2 adds explicit TDD exception justification
(styling-only change per CLAUDE.md)
WARNING 1: Plan 02 keeps autonomous: false with comment explaining
checkpoint is for download flow verification
WARNING 2: Plan 01 must_haves.truths now includes edge case validation
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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