Symphony

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

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.

Fork Changes (RaistlinMuc)

This fork extends the Elixir implementation with a practical multi-project monitor for Git-based ticket workflows.

Implemented additions:

• Multi-project discovery from local Codex state (~/.codex/.codex-global-state.json)
• Monitored project CRUD persisted at ~/.codex/symphony/projects.json
• GitHub and GitLab tracker adapters (including https://git.pq-computers.com)
• Dashboard sections for discovered and monitored projects
• New REST endpoints under /api/v1/projects/*
• Per-project run mode (build_only and full_agent config values)

Notes:

• Legacy Linear-based single-workflow mode remains available.
• In the current fork state, build_only is fully wired. full_agent is present as a mode and config path and currently executes the same build job pipeline.

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 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

For this fork-specific behavior and APIs, see the added sections in elixir/README.md.

---

License

This project is licensed under the Apache License 2.0.