Show HN: Contrabass – Go and Charm Stack Implementation of OpenAI's Symphony
junhoyeo Saturday, March 07, 2026
OpenAI released Symphony — a project-level orchestrator that watches your Linear board, spawns isolated coding agents per task, and lands PRs automatically. Engineers manage work at a higher level instead of supervising agents one by one.
They shipped an Elixir reference implementation and explicitly said "implement it in any language you want." So I built the Go version — with multi-agent team coordination on top, so multiple agents can collaborate across different parts of a codebase in parallel. Currently supports openai/codex and opencode as agent runtimes.
GitHub: https://github.com/junhoyeo/contrabass
Summary
Contrabass is an open-source software tool that provides a user-friendly interface for creating and editing music scores. It supports a wide range of musical notation and allows users to easily collaborate on projects, making it a valuable resource for composers, musicians, and music educators.
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Summary
github.com