Six months ago, while working on an internal productivity tool, our team made a controversial (at the time) decision: we’d build our repo with no human-written code. Every line in our project repository had to be generated by Codex. To make that work, we redesigned our engineering workflow from the ground up. We built an agent-friendly repository, invested heavily in automated tests and guardrails, and treated Codex as a full-fledged teammate. We documented that journey in our previous blog post on harness engineering⁠. And it worked, but then we ran into the next bottleneck: context switching. To solve this new problem, we built a system called Symphony. Symphony⁠(opens in a new window) is an agent orchestrator that turns a project-management board like Linear into a control plane for coding agents. Every open task gets an agent, agents run continuously, and humans review the results.

Full report : OpenAI releases Symphony, an open-source spec for agent orchestration that turns a project-management board like Linear into a control plane for coding agents.