Block Put Its Agents in the Team Chat. Buzz Is an Audit Log Before It Is a Slack Killer.

The most revealing line in Block's Buzz repository is written for employees.

Do not use the public build, it says. Download the internal version from squareup/buzz-releases. That build already points at Block's relay and agent provider.

Block is using a separate, preconfigured version of its open-source workspace inside the company. That is a stronger case study than the launch claim that Buzz might replace Slack and GitHub. It tells us the product has crossed the line from demo to working infrastructure for at least one team, while stopping well short of proving an enterprise migration.

Buzz launched publicly on July 21. It puts people and AI agents in the same channels, gives each agent a cryptographic identity, and records messages, code patches, approvals, and workflow events in one signed log.

The Slack comparison explains the interface. The audit log explains the product.