Block Launches Buzz, Nostr-Based Team Chat Platform for Humans and AI Agents on Tuesday

According to Jack Dorsey, Block launched Buzz on Tuesday (July 21), a free, open source platform where employees and AI agents work together in a shared workspace. Built on the Nostr protocol, Buzz combines team chat, code repositories, and automated workflows, giving every human and agent its own cryptographic identity. The platform is model-agnostic, supporting agents built on Claude Code, OpenAI's Codex, and Block's goose framework. Version 0.4.21 is available for self-hosting or through Block's managed service, with desktop builds for macOS, Windows, and Linux.
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