Redline is a lightweight annotation tool for writers and editors who work in markdown. Select any text on a live page — a blog post, documentation, landing page — and attach an edit note: rewrite, tone, cut, expand, or fix. Annotations are synced to a local JSON file via Google Drive, then a local watcher applies the edits directly to your .md source files using Claude AI. No accounts, no databases, no friction. Just highlight, note, and move on.
