This is f*cking insane, the CEO of Y Combinator open-sourced his own second brain and most people still don’t know it exists
8 second brain repos you haven’t seen yet:
-> gbrain (by garrytan)
http://github.com/garrytan/gbrain
the second brain of the YC CEO, every fact keeps its source and every agent shares one memory
-> llm wiki (by karpathy)
http://gist.github.com/karpathy/442a6bf555914893e9891c11519de94f
the original idea file behind all of this
-> ai-memory (by akitaonrails)
http://github.com/akitaonrails/ai-memory
hand the work from Claude Code to Codex without losing context, memory lives in plain markdown
-> agent second brain (by smixs)
http://github.com/smixs/agent-second-brain
send a voice note in Telegram and it lands as a linked note in your Obsidian vault
-> cog second brain (by huytieu)
http://github.com/huytieu/COG-second-brain
33 skills and 10 agents running on plain markdown, no database
-> open second brain (by itechmeat)
http://github.com/itechmeat/open-second-brain
a nightly pass turns the corrections you keep repeating into rules your agent follows
-> claude second brain (by jessepinkman9900)
http://github.com/jessepinkman9900/claude-second-brain
one npx command scaffolds Obsidian, Claude Code and local search
-> baalda (by naveedharri)
http://github.com/naveedharri/baalda
a team second brain where people and agents edit the same markdown files
the CEO of Y Combinator runs his agents on this
you are still digging through bookmarks