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.

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.

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

Check out rust-todoist/README.md for instructions on how to set up your environment and run the Rust Todoist implementation. The Elixir runtime remains in this fork as a legacy reference, but Rust is the primary implementation path here. 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/rust-todoist/README.md

For Rust Todoist planning and implementation docs, see:

• rust-todoist/docs/linear-to-todoist-prd.md
• rust-todoist/docs/linear-to-todoist-spec.md
• rust-todoist/docs/todoist-rust-runtime.md

• Root scripts/ is for repo-wide tooling and shared smoke-harness assets.
• rust-todoist/scripts/ is for Rust Todoist runtime-local helper scripts.
• scripts/smoke_repo_baseline/ is a fixture that models the root of the external smoke repo, which is why it includes its own AGENTS.md.

Runtime file logs are written relative to the process current working directory unless --logs-root is provided.

• Launch from repo root: log/symphony.log
• Launch from rust-todoist/: rust-todoist/log/symphony.log
• Launch from elixir/: elixir/log/symphony.log
• Override with --logs-root /path: /path/log/symphony.log

Rotation is size-based in both runtimes, not daily:

• Rust keeps the current file plus symphony.log.1 through symphony.log.5, rotating before a write would exceed 10 MB.
• Elixir uses OTP's wrapped disk log with 5 files at 10 MB each, plus .idx and .siz metadata files in the same directory.

This project is licensed under the Apache License 2.0.