Second Brain
An LLM-maintained personal knowledge base built on the LLM Wiki pattern. Drop raw sources into a folder, let the LLM compile them into a structured wiki, and browse it all in Obsidian.

How It Works
You feed raw material (articles, papers, notes, transcripts) into a raw/ folder. The LLM reads everything, writes structured wiki pages, creates cross-references, and maintains an index. You browse the results in Obsidian — following links, exploring the graph view, and asking questions.
The LLM is the librarian. You're the curator.
Prerequisites
- Obsidian — the markdown editor you'll browse your wiki in
- An AI coding agent — Claude Code, Codex, Cursor, Gemini CLI, or any agent that supports Agent Skills
- Node.js — required for installing the skills via npm
Install
npx skills add NicholasSpisak/second-brain
This installs four skills into your AI agent (Claude Code, Codex, Cursor, Gemini CLI, and 40+ others):