Level up yourAI coding workflow
Professionally crafted skills for Claude Code, Codex, and other AI agents. Install the jsm binary in one command, sign in, and sync serious workflows across machines.
What makes a skill exceptional?
Most skills are thin markdown files. Premium skills layer scannable overviews with deep references, include runnable validation, and integrate hooks and subagents for complex workflows.
Premium skills are layered: a scannable SKILL.md front door, deep references for detail, and structure that keeps token usage efficient.
premium-skill/
├── SKILL.md # Quick-scan overview
├── references/ # Deep docs (patterns, recipes)
└── assets/ # Templates + artifactsInstall, search, and sync skills from your terminal.
The jsm CLI makes managing your skills effortless. No web dashboards needed.
Skills that actually work.
Each skill is a battle-tested prompt system that makes Claude Code dramatically more effective at real engineering tasks. Here are three from the library.
Make your code faster without breaking it
Most optimization is guesswork dressed up as engineering. This skill enforces a strict loop: baseline first, profile to find the real hotspot, prove behavior is preserved, change one lever, and verify the win. No hand-waving, no regressions.
Developers reach for optimization tricks they read about online — rewriting allocators, switching data structures, adding caches — without profiling first. Half the time the bottleneck is somewhere else entirely, and the "optimization" introduces subtle behavior changes nobody catches until production.
The skill forces a measured workflow: capture the actual p95 and throughput baseline, profile to rank hotspots by impact × confidence ÷ effort, define behavioral golden outputs before touching code, then change exactly one lever and re-measure. Every speedup claim is backed by numbers, not vibes.
Stop building admin pages from scratch every time
A complete playbook for building admin surfaces that operators can actually run a business from. Handles permissions, audit logging, dangerous actions, and the information architecture that makes it all navigable.
Admin areas tend to grow into a mess of disconnected pages, inconsistent APIs, and missing audit trails. Each new feature adds another one-off route that nobody can find.
The skill consolidates everything into a single admin shell with explicit domain ownership, permission checks on every mutation, and operator-first workflows that prioritize action over vanity dashboards.
Build tools that agents actually understand
The difference between an MCP server that agents fumble with and one they use fluently is entirely in the design of tool names, error messages, and documentation. This skill covers all of it.
Most MCP servers are designed for human developers, not AI agents. Tool names are ambiguous, error messages are meant for debugging rather than self-correction, and docs describe what tools do but not when or why to use them.
The skill gives you a naming taxonomy that agents parse reliably, error patterns with enough semantic context for self-correction, and documentation templates that cover preconditions, side effects, and sequencing.
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.
Actual (unsponsored) tweets from people paying $20/month for Jeffrey's Skills. Discovered by dogfooding xfon Jeffrey's X archive.
Simple pricing. Full access.
$20/month for individuals. Team & enterprise plans start at $300/month for 3 seats. See full pricing.
- 71+ premium skills (and counting)
- New skills added daily
- Community skill swap meet
- CLI access (jsm) + offline search
- Personal cloud skill storage
Cancel anytime. No commitments.
Upgrade your AI coding workflow.
Join professional developers who use these curated skills daily to ship faster and higher quality code.
No free tier. No discounts. Just value.