Y Combinator Open-Sources QM: A Multiplayer Agent Harness That Runs in Slack and the Web

Y Combinator has released QM under an MIT license, a multiplayer agent harness that allows multiple AI agents to collaborate within Slack and web interfaces. QM is designed to enable teams to deploy coordinated multi-agent workflows in environments where human-in-the-loop interaction happens naturally — chat interfaces and browsers — rather than requiring custom orchestration infrastructure. For developers building collaborative AI systems or internal tools, QM provides a ready-made scaffolding that handles agent coordination, message routing, and interface integration out of the box. The MIT license means it can be used and modified freely in commercial products, lowering the barrier for startups to ship multiplayer agent experiences. This release is particularly relevant for teams building AI-powered productivity tools or internal copilots on top of Slack.