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Premium AI Coding Skills

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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.

How the CLI worksRead the docs
From the creator of
UBSCASSBVNTM
CLI-first workflow
jsm — zsh
$
Found 3 matching skills:
1. multi-pass-bug-hunting : comprehensive bug audit
2. ubs : ultimate bug scanner
3. codebase-audit : domain-specific auditing
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Premium Skill Quality

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.

progressive-disclosure.md

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 + artifacts
CLI-First Experience

Install, search, and sync skills from your terminal.

The jsm CLI makes managing your skills effortless. No web dashboards needed.

jsm — Terminal Demo
$
Opening browser for authentication...
✓ Authenticated as dev@example.com
From the premium library

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.

Extreme Software Optimization
Extreme Software Optimization

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.

The problem

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.

How this skill solves it

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.

Performance wins you can prove with before/after benchmarks
Zero behavior regressions because golden outputs are tracked throughout
A repeatable optimization loop instead of ad-hoc performance hacking
Admin Page for Next.js Sites
Admin Page for Next.js Sites

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.

The problem

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.

How this skill solves it

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.

One coherent admin surface instead of scattered internal tools
Safe privileged operations with permissions, audit trails, and action reasons
Operators who can resolve issues fast instead of hunting through pages
MCP Server Design
MCP Server Design

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.

The problem

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.

How this skill solves it

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.

Agents that use your tools correctly on the first attempt
Reliable multi-step workflows with explicit, testable tool contracts
New agent integrations in hours instead of days
Unlock the full libraryBrowse all skills
Why Jeffrey's Skills?

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.

What developers say

Loved by developers worldwide.

“This is the coolest thing ever! I'm a kid in a candy shop. Thanks to @Eminemead I found Beads Viewer by @doodlestein. Absolutely love it!”
@5aikat
on X
“Getting Ralph up and running with beads and beads_viewer (both incredible projects). Combined with skills for creating PRDs. Feels like magic. Incredibly good.”
@theplgeek
on X
“This looks INSANE! Agent native beads cli just got a major upgrade. Check out @doodlestein new beads viewer. Omg looks beautiful.”
@nummanali
on X
“TIL about beads_viewer. Such a ride exploring the @doodlestein agent tools universe.”
@micahstubbs
on X
“The learning never stops! CASS by @doodlestein and CORE by @manikagg01 are both memory solutions for agents. Digging into them and loving it.”
@chrislema
on X
“Sick, I use your beads viewer which has been awesome, still exploring its potential. It indexed so fast wtf.”
@zazaloaf
on X
“Btw, beads viewer is amazing!”
@yevhen
on X
“CASS was the last thing I got set up before running my first new CC session on the new build. Incredible how fast and effective it is.”
@mjs527
on X
“Thanks for sharing all of this, Jeffrey. I used your Agent Mail MCP on a project yesterday and 🤯”
@telecasterrok
on X
“Use it with Agent Mail == holy grail.”
@metapog
on X
“Agent Mail and Beads feel like the first "agent-native" tooling.”
@jefftangx
on X
“Jeff is one of the most high quality follows around right now — cass, beads viewer, ultimate bug scanner, agent mail, and more are significant productivity boosters for me.”
@mjs527
on X
“Average Agent Mail processing time: 12 milliseconds, consistently.”
@codewithimanshu
on X
“I appreciate you sharing your journey. I found Agent-Mail awhile back but had to learn for myself that I needed it.”
@F_AI_Mouse
on X
“Definitely going into the skills list once I get around to starting to use it — thanks.”
@etheraael
on X
“Man, I love your prompts! And I'm not even an LLM!”
@WillPapper
on X
“You're a fantastic resource. Thank you for utilizing your gift, staying cracked, and sharing it with others.”
@brettmarl
on X
“Bloody hell - you're living in the future here man. Following in your footsteps.”
@maboroshi_tech
on X
“Brilliant Jeffrey. Thanks for posting all of this great info and detail. I am learning many things from you.”
@rikilamadrid
on X
“This is super cool. You're making awesome stuff. Love following along.”
@DevJBMH
on X
“lowkey revolutionary. incorporating this in my workflow”
@ajramos_
on X
“Mate, I tried your prompts on a CC cloud environment... Results are outstanding.”
@Anto_1ns
on X
“Bookmarked. Good prompts are worth their weight in gold.”
@Serg_dev_
on X
“With good enough prompts you can close the gap from vibe coding to true coding. This is one of those prompts.”
@FrancescoFoco
on X
“All ur prompts are gems”
@_buildspace
on X
“you need to get @doodlestein on there so he can show us his insane workflow”
@latentspacepod
on X
“Speed changing the workflow is a game changer”
@ZainSid05
on X
“Been following your workflow recently. Today I started with beads and bv. Ho lee sheet”
@__preacherman__
on X
Read the case studies
Simple pricing

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$20/month for individuals. Team & enterprise plans start at $300/month for 3 seats. See full pricing.

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  • 71+ premium skills (and counting)
  • New skills added daily
  • Community skill swap meet
  • CLI access (jsm) + offline search
  • Personal cloud skill storage
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