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Documentation Index

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Open SourceApplications Layer

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Symphony

Autonomous project execution: Symphony watches your backlog, assigns tasks to coding agents, and verifies their work — you manage the work, not the agents.
Symphony GitHub

Type

Open Source (Apache 2.0)

Stack Layer

Applications

Language

Elixir

Stars

22.8k+

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What it is

Symphony is OpenAI’s reference implementation of an agent orchestration system for software development. It shifts the developer’s role from supervising individual agents to managing work queues: Symphony monitors a project backlog (e.g., a Linear board), autonomously assigns tasks to coding agents, and verifies completion through CI status and code review. The model is “isolated, autonomous implementation runs” — each task is a self-contained agent session, reducing the interference and state accumulation that plagues long-running agents. The repo includes both a detailed specification document and an experimental Elixir implementation. It’s positioned for engineering teams that have already adopted harness engineering practices and want to scale agent usage across a full development backlog without individual supervision.
Use this when your team has moved beyond one-off AI coding sessions and wants autonomous agents working through a project backlog continuously, verified by your existing CI pipeline.

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Get started

GitHub ↗

Spec document, Elixir reference implementation, and architecture notes.

Ruflo

Multi-agent orchestration platform with pre-built specialist agents.

HumanLayer

Claude Code IDE for scaling AI-assisted development organization-wide.