Show HN: GhostMark – A bookmark manager that uses GitHub Gists as its database

I wanted a dead-simple cross-device bookmark manager without setting up a real database. GhostMark uses a "secret" GitHub Gist as the backend - free, no infrastructure, and surprisingly fast. The whole thing is a single 200-line serverless function on Vercel. Features: - PWA that works offline and installs to home screen - CLI for terminal users (ghostmark -l <url>) - iOS Scriptable integration for quick saves from Share Sheet - No dependencies (native fetch only) Total stack: 1 JS file + 1 JSON gist. Feedback welcome! - especially from anyone who's used Gist for unconventional storage before.