Running four AI tools means four tools that each know a different half of what you told them. On a team it gets worse, because the half your colleague explained on Tuesday never reaches you at all.
I have been building Second Brain around that problem for a while. Today the team version went live: every member gets a private layer, the team gets a shared one, and recall reads across both. It runs in your own Cloudflare account and it is still MIT.
While building shared memory for teams, I spent a lot of time thinking about what AI should know. The more uncomfortable question was what should never enter the shared layer.
Private notes? Feedback about a teammate? A half-formed strategy?
Second Brain gives your team one AI memory that works across Claude, ChatGPT, Cursor and any MCP client. Personal memories stay private, shared ones reach everyone, and every write is logged. Free, MIT licensed, running in your own Cloudflare account.
Think about how you work today. You use Claude for writing. ChatGPT for research. Cursor for code. Maybe Codex for longer tasks.
Each one learns something about you. Your preferences. Your projects. Your decisions. But none of them talk to each other.
So you end up repeating yourself. Re-explaining context. Correcting assumptions that one tool got right weeks ago in a different conversation.
It is like having five assistants who each only remember the conversations they were personally in. They are all smart individually, but collectively they are forgetful.
Second Brain remembers your projects, people, decisions, and preferences across Claude, ChatGPT, Cursor, Codex, and any MCP client. V2 automatically links related memories, follows those connections during recall, and distinguishes settled decisions from drafts and stale context. Open source and self-hosted in your Cloudflare account.
Remember when @pooja_phillips asked if there was a no-code way to get Second Brain running? Or when others mentioned being uncomfortable with git and the terminal?
