A step-by-step blueprint for building a personal bookmark saving and archiving tool. Built with Next.js, Neon Postgres, and LLM-powered auto-tagging. Designed to be pasted into a Claude Code session and built in one sitting.
What you get: A self-hosted web app that captures URLs, extracts content as clean markdown, auto-tags and summarizes via LLM, and optionally syncs everything as markdown files to a GitHub repo for your second brain.
Cost: $0/month (Vercel free tier + Neon free tier). Only cost is LLM usage via OpenRouter (~$0.0002 per bookmark with Gemini Flash — roughly 5,000 bookmarks per dollar).