Y Combinator gave away the AI tool it runs itself on. QM is an open-source, MIT-licensed harness spanning accounting, legal, events, and engineering. It swaps between Claude Code, Codex, and other models with zero lock-in.
Every YC staffer gets a private, sandboxed workspace with its own memory, files, permissions, and scheduled jobs. The team says it even used the system to build itself, real-world proof it holds up under daily use.
Pick your engine: Pi, OpenCode, Codex, or Claude Code, all interchangeable behind one Slack and web interface. No procurement process sits between an employee and their own automation.
The logic: agent orchestration is plumbing, not a product edge, so hoarding it buys little. Expect more startups to publish their internal stacks now that YC set the norm.