openai/symphony

openai/symphony

Description: Symphony turns project work into isolated, autonomous implementation runs, allowing teams to manage work instead of supervising coding agents.

Language: Elixir

License: Apache-2.0

Stars: 25230

Forks: 2541

Open issues: 8

Created: 2026-02-26T21:54:00Z

Pushed: 2026-06-09T23:25:36Z

Default branch: main

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README:

Symphony

Symphony turns project work into isolated, autonomous implementation runs, allowing teams to manage work instead of supervising coding agents.

[](https://player.vimeo.com/video/1186371009?h=5626e4b899)

_In this demo video, Symphony monitors a Linear board for work and spawns agents to handle the tasks. The agents complete the tasks and provide proof of work: CI status, PR review feedback, complexity analysis, and walkthrough videos. When accepted, the agents land the PR safely. Engineers do not need to supervise Codex; they can manage the work at a higher level._

> [!WARNING] > Symphony is a low-key engineering preview for testing in trusted environments.

Running Symphony

Requirements

Symphony works best in codebases that have adopted harness engineering. Symphony is the next step -- moving from managing coding agents to managing work that needs to get done.

Option 1. Make your own

Tell your favorite coding agent to build Symphony in a programming language of your choice:

> Implement Symphony according to the following spec: > https://github.com/openai/symphony/blob/main/SPEC.md

Option 2. Use our experimental reference implementation

Check out [elixir/README.md](elixir/README.md) for instructions on how to set up your environment and run the Elixir-based Symphony implementation. You can also ask your favorite coding agent to help with the setup:

> Set up Symphony for my repository based on > https://github.com/openai/symphony/blob/main/elixir/README.md

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License

This project is licensed under the [Apache License 2.0](LICENSE).