obsidian-second-brain

One codebase. Six CLIs. Same brain.

obsidian-second-brain

An evolution of Karpathy's LLM Wiki pattern: a vault that rewrites itself.

Every source updates existing pages instead of just appending new ones. Contradictions reconcile automatically. Your vault compounds while you sleep.

Powered by OKM - Open Knowledge Metabolism: every stored fact is timeless, dated, or a pointer - so your knowledge base never fills with facts that used to be true.

45 commands · auto-synthesis · thinking tools that argue with you

live research from X, the web, and YouTube · 4 scheduled agents · 4 role presets

write-time AI-first validator · /create-command interview flow · multilingual trigger schema

Demos · OKM · See it in action · All commands · Install · Presets · Discussions

One /obsidian-save - five cross-linked notes. Real footage, synthetic vault. More demos →

v0.14 - The Harvest (July 2026): we scanned all 408 forks of this repo and shipped the best ideas back upstream, crediting every author.
Multi-turn /obsidian-brainstorm, bounded vault recall, full-page source reading, Brave + Tavily sources, a guarded updater, supersession-aware search, secret detection, pt-BR triggers - and one Agent Skills build serving Codex, OpenCode, Antigravity, and Copilot CLI (v0.13). 191-test CI wall. See the changelog →

From the blog · The AI Operator →

Featured: "HUGE update on obsidian-second-brain: The Architect"
/obsidian-architect · document your codebase into your vault · the full before-and-after