Summary
OpenAI published Symphony on April 27 as an open-source specification for turning an issue tracker like Linear into a control plane for coding agents. The company says the approach gave some teams a 500% increase in landed pull requests by shifting Codex from interactive sessions to continuously running ticket-level work.
What changed
OpenAI released Symphony as an open-source orchestration spec that maps open tasks to dedicated coding-agent workspaces and continuously runs, restarts, and reconciles agents against issue state.
Why it matters
This takes Codex beyond chat and CLI interaction into always-on task orchestration. It also gives the market a concrete blueprint for how frontier coding agents can be managed at the ticket layer instead of through manual session babysitting.
Evidence excerpt
OpenAI says Symphony turns a project-management board like Linear into a control plane for coding agents and led to a 500% increase in landed pull requests on some teams.