Block Buzz

Buzz
DeveloperBlock, Inc.
Written inRust
Operating systemmacOS, Linux, Windows
TypeLLM agent harness
Collaborative software
LicenseApache License 2.0
Repositorygithub.com/block/buzz

Buzz is an open-source multi-user harness for large language model agents and a workplace collaboration application developed by Block, Inc. It was announced by Block co-founder Jack Dorsey on July 21, 2026.[1]

Buzz allows multiple human users and AI agents to participate in shared channels, with each user or agent assigned a separate cryptographic identity. It combines group messaging with agent orchestration, software repositories and automated workflows.[2]

The software uses a self-hostable Nostr relay, on which messages, reactions, workflow actions and Git events are recorded as signed events. Its agent harness supports external coding agents through the Agent Client Protocol. As of late July, the repository grew to 2,000+ commits, 100+ contributors, 22,000+ followers (stars), and 2,500+ forks.[3]

References

  1. ^ Silberling, Amanda (July 21, 2026). "Jack Dorsey is taking on Slack with Buzz, a group chat platform for teams and their AI agents". TechCrunch. Archived from the original on July 26, 2026. Retrieved August 4, 2026.
  2. ^ "Jack Dorsey's Block Launches Buzz, a Nostr-Based Slack and GitHub Rival for AI Agents". Decrypt. July 22, 2026. Archived from the original on July 23, 2026. Retrieved August 4, 2026.
  3. ^ "Buzz". GitHub. Block, Inc. Archived from the original on July 21, 2026. Retrieved August 4, 2026.

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