Level up yourAI codingworkflow
Professionally crafted skills for Claude Code, Codex, and other AI coding agents. Stop writing mediocre prompts.
Not just a markdown file. A complete system.
See the difference between a basic skill and a professionally engineered one.
basic-skill/
Single file, minimal structure
What's missing
cass/
Cross-Agent Session Search
Deep References
5 detailed reference docs
Ready Scripts
Executable automation
Self-Testing
Built-in validation
Workflow Patterns
Real-world recipes
What makes a skill exceptional?
Let's break down the CASS skill — a real premium skill that mines your agent session history.
Mining your conversation history beats inventing new approaches. If you typed it 10+ times, it works.
# Your conversation history contains:
- Refined prompts — Every rephrase that worked
- Working rituals — Prompts repeated 10+ times
- Scope decisions — "When did we decide NOT to do X?"
- Recovery moments — What you searched after context lossInstall, search, and sync skills from your terminal.
The jsm CLI makes managing your skills effortless. No web dashboards needed.
Premium skills designed by Jeff.
No fluff. Just tools that work.
Battle-tested
Every skill is refined through real-world usage across dozens of projects.
Complete packages
Each skill includes examples, references, and subagent definitions.
CLI integration
Use the jsm CLI to search, install, and manage skills from your terminal.
Always updated
Skills are continuously refined based on the latest Claude Code features.
Self-validating
Built-in tests ensure skills work correctly before and after updates.
Community driven
Share your own skills and benefit from the collective expertise.
Loved by developers worldwide.
“Man, I love your prompts! And I'm not even an LLM!”
“Your work is sophisticated. The raw talent trail you are blazing with AI is white hot. Thank you for sharing your work, huge fan of what you are doing.”
“You're a fantastic resource. Thank you for utilizing your gift, staying cracked, and sharing it with others.”
One plan. Full access. No games.
- All premium skills
- Personal skill storage
- CLI access (jsm)
- Continuous updates
- Community sharing
Cancel anytime. No commitments.
Pair premium skills with the free ecosystem.
Premium skills are the backbone. The ecosystem gives you the free tools and prompt libraries that make them even faster to apply.
Find skills by flywheel tool
Jump straight to skills that pair with the free tools you already use.
Ready to supercharge your AI coding workflow?
Join developers who've leveled up their Claude Code, Codex, and AI-assisted development with professionally crafted skills.