Starter bundles

Every new gem launches with the right context. Pick an agent, choose a stack bundle, and crystl sets everything up for you.

works withany CLI agentclaude codecodexantigravity cli · untested

The New Gem panel lets you pick an agent (Claude, Codex, or Antigravity) 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/. Antigravity 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.

Dive deeper in the Starter Bundles docs →

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 Antigravity CLI. The bundle content adapts to each agent's file structure and conventions.
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More features

Gems & Shards

Gems, shards, and the Crystal Rail keep every project one click away.

Action Panels

See what every Claude session is doing at a glance.

Parallel Sessions

Run multiple Claude instances on the same repo without conflicts.

Hero Shards

Summon a single hero as a shard — its own agent, model, and persona — without a quest party.

History Navigator

Browse, jump through, and search every session: conversation and tool calls.

Token Tracking

Track token burn per shard, estimate turns left, and reclaim context window by disabling heavy plugins and skills.

Workbench

A slide-out task list in every project, backed by a WORKBENCH.md the agent reads and writes with you.

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 agentic skills that teach agents like Claude Code or Codex new tricks: code review, testing, deployment, and more.

Cavrn

The terminal as structured data: every turn, tool call, result, and table captured as agent-readable metadata. Drawn fast on the GPU with Metal.

Remote Development

Full crystl integration over SSH: approval panels, file relay, and click-to-open on remote machines.

Agent Orchestration

One agent spawns, supervises, and merges the work of many: a control room for a team of coding agents.

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.

Copy Bar

A one-click copy bar under the terminal. Agents stage text, you click Copy. Editable, up to 10 tabs, free.