Starter Bundles
Every new gem launches with the right context. Pick an agent, choose a stack bundle, and Crystl scaffolds everything for you.
The New Gem panel lets you pick an agent (Claude, Codex, or Gemini) and a stack bundle (Next.js, Python, Go, Swift, and more). Crystl writes the instruction file, installs matching rules and skills, and sets up config files — all before you type a single command.
Bundles are curated starter packages for specific stacks. Each one includes a CLAUDE.md (or codex.md / GEMINI.md) with build commands, architecture docs, and conventions — plus rules and skills tailored to that stack. You can also create your own bundles from the File Library.
Why it matters
One-click scaffolding
Pick a stack from the dropdown and hit create. Crystl writes the instruction file, installs rules to .claude/rules/, and sets up skills — all in one step.
Stack-specific bundles
Next.js, React, Vue, Svelte, Python, Go, Swift, Astro, and more. Each bundle includes build commands, architecture, conventions, and testing setup tailored to the stack.
Multi-agent support
Bundles adapt to the agent you choose. Claude gets .claude/rules/ and skills. Codex gets .agents/skills/. Gemini inlines everything. Same bundle, right output.
Custom bundles
Build your own bundles from the File Library. Curate rules, skills, and instruction files for your team's stack — then pick them from the dropdown on every new gem.
Ready to try it?
Create a free account and download Crystl for macOS.
get started getting started guide →Frequently asked questions
- What's in a bundle?
- An instruction file (CLAUDE.md, codex.md, or GEMINI.md) with build commands, architecture, conventions, and testing setup. Plus curated rules and skills installed as separate files.
- Which stacks have bundles?
- Universal, Next.js, Vite React, Vue/Nuxt, SvelteKit, Astro, Node API, Python, Go, React Native, and Swift. More are added regularly.
- Will bundles overwrite existing files?
- Never. The installer skips any file that already exists in the project directory.
- Can I create my own bundles?
- Yes. In the File Library, create or edit instruction files and mark them as bundles. They'll appear in the stack dropdown on the New Gem panel.
- What agents are supported?
- Claude Code, OpenAI Codex, and Google Gemini. The bundle content adapts to each agent's file structure and conventions.
More features
Gems & Shards
Gems, shards, and the Crystal Rail keep every project one click away.
Track Everything
See what every Claude session is doing at a glance.
Parallel Sessions
Run multiple Claude instances on the same repo without conflicts.
Conversation History
Every session is preserved. Scroll back through the full context anytime.
Prompt Integration
Facet Inserts give you one-click access to saved prompts, commands, and shortcuts.
Agent Config Editor
Create, edit, and manage CLAUDE.md, rules, skills, and agent config files with a block editor, file chooser, and project optimizer.
Project Optimizer
Scan your project for gaps in agent configuration — missing files, incomplete docs, oversized code, and setup issues — with one-click fixes.
Skills Library
Browse and import slash commands that teach Claude new tricks — code review, testing, deployment, and more.
Remote Development
Full Crystl integration over SSH — approval panels, file relay, and click-to-open on remote machines.
Crystl Quest
Assemble a party of specialized agents. Each brings unique skills, coordinates in shared chat, and executes in parallel.
Screenshot Bar
Drag recent screenshots into the terminal. Spotlight-powered, always up to date.