Contrabass

Contrabass coordinates AI coding agents working through project issues, for developers managing several tasks or agent teams. It runs locally on macOS and Linux and reimplements OpenAI's Symphony approach.

• Issue-driven work: Connect Linear or GitHub Issues, or use the built-in local Internal Board; tasks with unresolved blockers wait before dispatch.
• Agent coordination: Use Codex app-server, OpenCode, oh-my-opencode, OMX (oh-my-codex) or OMC (oh-my-claudecode), with team workflows covering planning, execution and verification.
• Separate workspaces: Issue-specific Git worktrees keep agent tasks apart, with a plain-directory fallback for projects without Git.
• Run oversight: The terminal interface and optional local Ziikoo browser dashboard show queues, agent stages, token use and completion estimates; the dashboard also provides live logs, board editing and agent stop controls.
• Failure handling: Contrabass detects stalled runs, retries failures and recovers abandoned task claims after a restart, and checks for a new commit before marking a run successful.

The orchestrator requires a separate supported agent runtime. Its Internal Board, team state and workflow timelines use local files; Linear and GitHub integrations require credentials, and optional Linear timeline sync publishes workflow events as issue comments. Default team workers require tmux, while the in-process worker mode doesn't. Contrabass is open source under Apache 2.0.