I still don’t understand why people keep building a Claude second brain from scratch when these 10 repos already built the whole system They take in your sources, link them into a wiki, check every claim, and one of them runs fully on your own machine 01 obsidian-skills → Obsidian’s own CEO teaches Claude how Obsidian really works https://t.co/lonWXdfFdE 02 claude-obsidian → drop in any source and Claude reads it, links it and files it into one connected graph of plain Markdown you own https://t.co/RNFghwuqU5 03 obsidian-second-brain → Claude Code remembers you between sessions, with 48 commands, all inside your Obsidian vault https://t.co/jgRWoDaAsk 04 karpathy-llm-wiki → one install line, then ingest, query with citations and lint, in Claude Code, Cursor, Codex or OpenCode https://t.co/UZSBdJh54Z 05 second-brain → raw sources in, linked wiki pages out, browsed in Obsidian https://t.co/ObKuAaXS5s 06 second-brain-os → the full kit: a 77-page guide, a starter vault, 18 skills, 72