Show HN: Cmux – Coding Agent Multiplexer
a day ago
- #cross-platform
- #agentic-ai
- #parallel-development
- Cross-platform desktop application for parallel agentic development.
- Enables contextual continuity between changes like code-review, refactor, and new-feature.
- Supports GPT-5-Pro for complex issues, running in the background for hours.
- Automatic stream resumption after restarts or connection issues.
- A/B testing: run multiple workspaces in parallel on the same problem with different approaches.
- Tangent exploration: launch tangents away from main work in cmux.
- Isolated workspaces with central view on git status updates.
- Multi-model support (sonnet-4-*, gpt-5-*, opus-4-*).
- Rich markdown outputs including mermaid diagrams and LaTeX.
- Custom agent loop inspired by Claude Code UX with features like Plan/Exec mode and VIM inputs.
- Preview state with potential bugs and performance issues.
- Download pre-built binaries for macOS (Intel/Apple Silicon), Linux (AppImage), and Windows (coming soon).
- Licensed under GNU Affero General Public License version 3.