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.