8 tasks: deps → renderer → bib/sync notes → cli/comments flip → migration phase A → migration phase C → execute migration → delete migration script. TDD per code task. Companion to the spec at .claude/specs/2026-04-28-comments-zotero-notes-design.md. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>