Symphony

Fork of openai/symphony with better defaults for production use and a complete onboarding flow. Push tickets to a Linear board, agents ship the code.

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.

Quick start

If you have an AI coding agent, one command:

npx skills add odysseus0/symphony -s symphony-setup -y

Then ask your agent to set up Symphony for your repo.

How it works

Symphony polls a Linear project for active tickets. Each ticket gets an isolated workspace clone and a Codex agent. The agent reads the ticket, writes a plan, implements, validates, and opens a PR. You review PRs and move tickets through states — the agents handle the rest.

The state machine lives in WORKFLOW.md — a markdown file with YAML frontmatter for config and a prompt body that defines agent behavior. Hot-reloads in under a second, no restart needed.

What's different from upstream

• Cheaper Linear calls — agents no longer burn tokens on schema introspection before every GraphQL call, and workpad sync is a single dynamic tool instead of a hand-rolled mutation
• Correct sandbox — the workflow is git + GitHub PR centric. Upstream's default sandbox blocks .git/ writes, which silently breaks the entire flow. Fixed.
• Media uploads via Linear — upstream references a GitHub media upload skill that doesn't ship. The workflow and Linear skill now use Linear's native fileUpload mutation for screenshots and recordings
• Setup skill — auto-detects your repo, installs worker skills, creates Linear workflow states, and verifies everything before launch

Manual setup

1. Build: git clone https://github.com/odysseus0/symphony && cd symphony/elixir && mise trust && mise install && mise exec -- mix setup && mise exec -- mix build
2. Install skills: npx skills add odysseus0/symphony -a codex -s linear land commit push pull debug --copy -y and copy elixir/WORKFLOW.md to your repo
3. In WORKFLOW.md, set tracker.project_slug and hooks.after_create (clone your repo + setup commands)
4. Add Rework, Human Review, Merging as custom states in Linear (Team Settings → Workflow)
5. Commit, push, then: mise exec -- ./bin/symphony /path/to/your-repo/WORKFLOW.md

Getting Started with OpenAI Symphony — full walkthrough with context on why these defaults matter.

License

Apache License 2.0