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Skills

Skills are superpowers you add to your assistant. A skill is a set of written instructions, sometimes with small tools, that teaches your assistant one job, such as planning a long task or writing in a natural voice. You install it once and the assistant uses it when the job comes up. Plugins, hooks and commands are listed here too: they install the same way.

Skills, Agents and Connectors Explained

Start here: skills for web developers

Our must-haves, most useful first. Install the first one, try it, then add more.

Start with this one

01
RecommendedskillInstalls cleanly
Good habits for building websites
Addy Osmani Agent Skills
Good working habits for building websites: clear plans, tests and reviews.
Test: installs cleanly and works without an account. Not yet used on real work.
EveryoneWatch outThe skills are text instructions, so the direct risk is low. The agent still runs commands that you approve.
For any assistant
Paste this in the terminal
```
$ npx skills add addyosmani/agent-skills
```
Other ways to install, and how we tested it

02
Plan, test and check its own work
Superpowers
Makes the assistant ask questions, plan, test and check its own work.
RecommendedskillInstalls cleanly
Install line
Type this inside Claude Code
/plugin install superpowers@claude-plugins-official
For Claude Code. All steps and how we tested it

8 skills match your filters

8 skills match your filters.

·
Good habits for building websites
Addy Osmani Agent Skills
Good working habits for building websites: clear plans, tests and reviews.
RecommendedskillInstalls cleanly
Install line
Paste this in the terminal
npx skills add addyosmani/agent-skills
For any assistant. All steps and how we tested it
·
Plan, test and check its own work
Superpowers
Makes the assistant ask questions, plan, test and check its own work.
RecommendedskillInstalls cleanly
Install line
Type this inside Claude Code
/plugin install superpowers@claude-plugins-official
For Claude Code. All steps and how we tested it
·
Pick colours, fonts and layouts
UI/UX Pro Max
Helps the assistant choose colours, fonts and layouts that look good.
RecommendedskillPartly tested (needs an account)
Install: step 1 of 2
Step 1 of 2 · Type this inside Claude Code
/plugin marketplace add nextlevelbuilder/ui-ux-pro-max-skill
For Claude Code. All steps and how we tested it
·
Security review of your code
Trail of Bits Skills
Security experts’ checklists to review your own code.
RecommendedskillPartly tested (needs an account)
Install: step 1 of 2
Step 1 of 2 · Type this inside Claude Code
/plugin marketplace add trailofbits/skills
For Claude Code. All steps and how we tested it
·
Add payments with Stripe
Stripe AI Toolkit
Stripe's official plugin with skills and tools that help an agent add payments, check out pages and billing to an app.
skillPartly tested (needs an account)
Install line
Paste this in the terminal
claude plugin install stripe@claude-plugins-official
For Claude Code. All steps and how we tested it
·
Build phone apps
Expo Skills
Helps the assistant build phone apps.
skillPartly tested (needs an account)
Install line
Paste this in the terminal
claude plugin install expo@claude-plugins-official
For Claude Code. All steps and how we tested it
·
Design a safe database
pg-aiguide
Helps the assistant design a safe, tidy database for your app.
skillInstalls cleanly
Install: step 1 of 2
Step 1 of 2 · Paste this in the terminal
claude plugin marketplace add timescale/pg-aiguide
For Claude Code. All steps and how we tested it
·
Security check for Gemini
Gemini CLI Security extension
Lets Gemini check your own code for security problems.
skillPartly tested (needs an account)
Install line
Paste this in the terminal
gemini extensions install https://github.com/gemini-cli-extensions/security
For Gemini CLI. All steps and how we tested it

Every must-have for web developers: skills, agents and connectors

Start here: skills for web developers

All skills