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.

44 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 · See it in action · All commands · Install · Presets · Discussions

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

v0.12 - The Stress Test (July 2026): we stress-tested our own tool with 32 AI agents and fixed what they found - 175 findings, 24 fix PRs, search 2-4x better, and tools that can no longer eat your notes.
Plus a native Claude Code plugin-marketplace install, a multilingual embedding default, and a 134-test CI wall.
See the changelog →

From the blog · The AI Operator →

Latest: "HUGE update on obsidian-second-brain: The Architect"
v0.10 ships /obsidian-architect · document your codebase into your vault · the full before-and-after

Deep dive: "I rebuilt Karpathy's LLM Wiki. Here's what's missing from the original."
Why append-only breaks at scale · the AI-First Vault Principle · three bugs in v1

Origin story: "I built this for myself. Then 1,374 strangers cloned it."
Two disconnected tools · the institutional-amnesia problem · 1,000+ stars in 7 weeks