For Crystal users
Crystal was the first GUI for managing multiple Claude Code sessions in parallel. Nimbalyst is the direct successor — same idea, more tools, and it works for both Claude Code and Codex. Every Crystal feature is here, plus a session kanban, visual editors for markdown, mockups, and diagrams, and an iOS companion app.
What changed
Crystal started at Stravu as an internal tool to manage parallel Claude Code sessions with git worktrees. It worked so well we shipped it publicly and called it the first Integrated Vibe Environment (IVE). Nimbalyst is what that idea grew into — a full visual workspace for building with Claude Code and Codex.
Crystal workflows
If you used Crystal to work this way, Nimbalyst supports the same patterns — with better visibility and review tools.
Launch the same prompt across multiple isolated sessions, compare the outcomes in the files sidebar, and keep the winner. Each session lives in its own git worktree so they never collide.
Ship feature A while reviewing feature B — with the kanban board you can see which session is waiting for input vs. still running.
Run multiple "explore my codebase and suggest improvements" prompts in parallel. Keep the good ideas as tracker items and drop the rest.
Spin up several "improve the look of..." sessions, then review the mockup and diff in the visual editors without leaving the app.
The original Crystal project is no longer actively developed. Its creators (Stravu) built Nimbalyst as the successor so all the Crystal work goes somewhere that continues to grow.
Download Nimbalyst, point it at your project folder, and your Claude Code sessions and git worktrees appear in the session list. There is no migration step — Nimbalyst uses the same Claude Code CLI under the hood.
Yes. Nimbalyst supports Claude Code (Anthropic) and Codex (OpenAI). You can run Claude Code and Codex sessions side by side in the same workspace.
Yes. Nimbalyst is free for individual use with no feature limits.