contrabass vs Fusion
Terminal-first orchestrator for issue-driven AI coding-agent runs — polls Linear/GitHub, runs Codex/OpenCode in git worktrees with retries and verification. Go/Charm rebuild of OpenAI's Symphony. — versus — A multi-agent software factory: describe a task, agents plan (PROMPT.md), build, review and merge in isolated worktrees — kanban + graph board, missions, agent chat rooms, any model. Early preview.
Same job — dispatch coding agents into isolated git worktrees with review gates — opposite philosophies: Contrabass is a lean terminal orchestrator fed by Linear/GitHub issues; Fusion is a full board-driven factory with visual workflows, missions and agent chat.
| contrabass | Fusion | |
|---|---|---|
| Stars | 198 | 964 |
| Forks | 23 | 118 |
| Language | Go | TypeScript |
| License | Apache-2.0 | MIT |
| Last activity | 2 months ago | today |
| Topics | coding, orchestration | coding, orchestration |
| Curated connections | 5 | 3 |
contrabass — the curator's take
Pick it when your work already lives in Linear or GitHub issues and you want local coding agents (Codex, OpenCode, oh-my-*) burning down the backlog unattended — worktree per issue, branch-advance verification so 'success' means commits actually landed, stall detection, deterministic retries, and a Bubble Tea TUI plus embedded web dashboard for visibility. Skip it for single interactive sessions (just run the agent CLI) or if you want cloud-hosted execution — pullfrog is the GitHub-Actions version of this job. Young Symphony reimplementation: the workflow parser accepts more fields than the runtime consumes, and the default team mode needs tmux.
Fusion — the curator's take
The most ambitious entry in the agent-factory wave: visual workflow authoring (plan→execute→review graphs you can edit), per-task oversight levels from observe to autonomous with human gates on merges, a multi-node mesh (fleet on a server, steered from your phone), importable 'agent companies' (440+ pre-built agents), and a Command Center with real fleet telemetry. Genuinely MIT and shipping weekly. When NOT: it wears its 'early preview' badge honestly — breadth currently outruns depth, so expect rough edges; if you want minimal-machinery unattended runs from an issue tracker, contrabass is the leaner tool, and a single interactive session needs none of this.