Block Launches Buzz: An Open-Source Collaboration Platform Built on the Nostr Protocol

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Block, the payment company owned by Jack Dorsey, has launched Buzz, an open-source collaboration platform built on the Nostr protocol. This on-chain development represents a new step in decentralized tools. Buzz enables human-AI collaboration through team chat, code repositories, and workflows. Each user and AI agent is assigned an encrypted identity. The platform integrates models such as Claude Code, OpenAI Codex, and Block’s goose. The code is open-sourced under the Apache 2.0 license. Version 0.4.21 is available for desktop, with mobile support in development. Dorsey stated that the tool aims to reduce reliance on Slack and GitHub.

According to Decrypt, Jack Dorsey’s payment company Block has officially launched Buzz, an open-source collaborative platform built on the Nostr protocol, enabling employees and AI agents to collaborate within the same workspace. Buzz integrates team chat, code repositories, and automated workflows, with each user and AI agent assigned a unique encrypted identity. It supports major model frameworks such as Claude Code, OpenAI Codex, and Block’s proprietary goose. The code is open-sourced under the Apache 2.0 license. Jack Dorsey stated that the platform aims to reduce the company’s reliance on Slack and GitHub; the current version, 0.4.21, supports desktop platforms including macOS, Windows, and Linux, with mobile support under development.

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