Teach your agents new skills without writing them
Browse and import agentic skills that teach agents like Claude Code or Codex new tricks: code review, testing, deployment, and more.
Skills are markdown files that give your AI coding agent specialized behaviors. Type /review and it knows exactly how to review your code. Type /deploy and it follows your deployment playbook, in agents like Claude Code or Codex.
The Skills Library has a growing catalog of ready-made skills organized by category. Browse, preview, and import with one click. Guild members get full access to the library; imported skills are saved to your starter bundles so every new gem can include them.
Why it matters
Teach your agent new tricks
Each skill is a markdown file that tells agents like Claude Code or Codex how to handle a specific task: review, test, deploy, explain, and more.
One-click import
Browse the catalog, preview any skill, and import it to your starters. It's included in every new gem automatically.
Organized by category
Skills are grouped by what they do: code quality, testing, documentation, deployment. Find what you need fast.
Growing catalog
New skills are added regularly. Guild members get full access to the library and all future additions.
Ready to try it?
Create a free account and download crystl for macOS.
get started getting started guide →Frequently asked questions
- What is a skill?
- A markdown file that teaches your agent a specific behavior. When you type /skill-name, agents like Claude Code or Codex follow the instructions in that file.
- Can I create my own skills?
- Yes. Add any .md file to your starters with a path like .claude/commands/my-skill.md. It works just like library skills.
- Are skills project-specific?
- You can add a skill file to your starter files so it's written into every new gem, and you can also insert skills into existing gems from the gem settings panel.
- Do I need Guild for skills?
- You can create and use your own skills for free. The Skills Library catalog requires a Guild membership to browse and import.
Crystl's Book of Spells
Master crystl with a grimoire of powerful prompts. Summon heroes, assemble a party, revive shards, and complete epic quests.
open the book →More features
Gems & Shards
Gems, shards, and the crystal rail keep every project one click away.
Action Panels
See what every agent is doing at a glance.
Agent Activity Panel
One live view of every agent across all your gems: who's working, who's idle, and where tokens are going.
Schedule Agents
Launch a fresh agent at a set time (once, daily, or weekdays). Pick the gem, agent, model, and prompt; crystl fires it on schedule.
Parallel Sessions
Run multiple Claude instances on the same repo in separate git worktrees.
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.
Markdown Editor
Render and edit any .md in a side panel. Toggle it from the workbench, and let agents open docs for you from the CLI.
Prompt Integration
Facet Inserts give you one-click access to saved prompts, commands, and shortcuts.
Agent File 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.
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.
Open Models
Run open models locally or hosted, orchestrate them with frontier agents, and cut token costs.
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.