Buzz: Open-Source Collaboration for Humans + AI Agents

About this video

Buzz by Block: Open-Source Slack-Style Collaboration for Humans + AI Agents (Demo & Setup) Repo: https://github.com/block/buzz The video introduces Buzz, a new open-source collaboration platform from Block built for humans and AI agents, and demonstrates how it works as a self-hostable Slack-like interface. It covers setup via the repo/README, creating communities and channels, adding and configuring agents, controlling who can invoke specific agents, and spinning up multiple instances of the same agent. The presenter shows how Buzz can connect to different agent harnesses (e.g., Codex, Claude Code, Goose) via Agent Client Protocol through the Buzz CLI, enabling cross-harness orchestration and threaded handoffs between agent roles. The video also highlights sharing local or subscribed compute through a relay so others can run agents on available hardware, and frames Buzz as a delegation-focused interface where agents act like teammates across departments.