Y Combinator

AI Agents · Developer Tools · Open Source

Launch

Y Combinator open-sources QM, the AI agent harness that runs its own office

The release bets that startups need a shared multiplayer agent workspace, not another single-user copilot bolted onto Slack.

• Y Combinator open-sourced QM under an MIT license on July 31, 2026, the multi-agent harness it built to run its own accounting, legal, events and engineering work.
• YC used QM internally to build QM itself, and describes it as 'a multiplayer agent harness for work' available through Slack and the web.
• Each person and each Slack room gets its own scoped memory, files, keychain, permissions, crons, web apps and durable sandbox, so individual agent sessions don't interfere with each other.
• QM is model-agnostic: the same TypeScript core (Node, Fastify, Postgres) can be driven by Pi, OpenCode, Codex or Claude Code, avoiding lock-in to one vendor.
• Security is set via three org-wide postures — Strict (human approval on every tool call), Auto (default, classifier screens external data) and Dangerous (screening off) — with all actions logged and credentials scoped per person.
• The GitHub release drew over 500 points on Hacker News within hours, with developers dissecting its built-in skills, including an 'anti-slop' design skill meant to stop AI output from looking templated.
• QM pushes AI agents past personal-assistant use into shared organizational infrastructure, giving startups a ready-made blueprint for company-wide automation instead of building orchestration and sandboxing themselves.