Supermemory open-sourced Company Brain, its discontinued paid Slack agent.

The repo, Apache 2.0, took 289 stars on its first day. It's the full product that had thousands of users: a Slack teammate building memory from channel conversations, acting in GitHub, Linear, Notion and Google Workspace over MCP, running code in its own sandbox, posting scheduled digests. Memory is a permissions graph that reads only with the asker's own access, and it one-button deploys to Cloudflare Workers. Permission-scoped team memory is the thing most internal-agent projects get wrong, and this is a production-tested reference for it.