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Agentic Systems & Reasoning (AGENT)

Y Combinator open sources QM agent harness

By Essential Brief Intelligence • 2026-08-04 • 2 min read

âš¡ Executive Digest (3-Minute Breakdown)

Y Combinator has open-sourced QM, a multiplayer AI agent harness used internally across accounting, legal, events, and engineering. The MIT-licensed system runs in Slack and on the web and remains early and buggy. QM targets organizations rather than individual users, requiring a cloud account, Postgres, and platform engineering skills. Each person and room receives isolated workspaces with scoped memory, permissions, crons, files, and sandboxes that carry consistently between Slack and the web. The architecture centralizes identity, policy, and scheduling in a headless core that supports multiple model vendors. Organizations can choose among three security postures, apply strict command denials, and self-host deployments after reviewing documentation and security guidance.

This update represents a notable development in the Ai sector. Organizations and founders tracking this space should evaluate potential strategic and technical implications on their operations.

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