Crystal
App : A product you use directly
Open source desktop app to launch and compare multiple Claude Code sessions in worktrees.
The open source alternative to Conductor, cross-platform.
Security reflects where data goes, requested permissions and incidents on record at the verification date. It is not a guarantee of zero risk: check the deployment mode and the connections you enable.
What it does, concretely
Crystal was an open source desktop application designed to manage multiple Claude Code sessions in parallel, using Git worktrees to isolate each working session.
The tool allowed developers to launch, monitor, and compare multiple Claude Code instances from a unified interface, without switching between separate terminals.
Crystal was aimed at developers who wanted to experiment with several code approaches simultaneously using an AI assistant, while keeping each track isolated in its own worktree.
Crystal has been deprecated since February 2026 and replaced by Nimbalyst, a more comprehensive workspace developed by the same team. It remains usable but no longer receives updates.
What it offers
- ·Launch multiple Claude Code sessions in parallel from a single interface.
- ·Isolate each session using Git worktrees to avoid conflicts between branches.
- ·Compare results produced by different sessions side by side.
- ·Cross-platform compatibility: macOS, Windows, and Linux.
- ·Open source architecture allowing inspection and modification of the source code.
In practice
- Price
- Free
- Commercial use
- Commercial use: yes
- Available on
- macos, windows, linux
- Licence
- MIT
Security and data
- Rating
- Security: one caveat, see the card
- Your data
- Data stays local
- Maintenance
- Inactive for over six months
- Last release
- 26 February 2026
Links and repository checked on 25 October 2026 · added on 1 June 2025