Build an app · 6 free picks

Build: build with current docs

The assistant often uses old function names from libraries that have changed. It also cannot see if a page works unless it opens it. These add-ons give it current docs and a real browser, plus skills for design, payments and phone apps.

Free picks (tested by us)

Most useful first. Each one was installed on a clean test system; start with the first, try it, then add the next.

01
RecommendedconnectorPartly tested (needs an account)
Current docs for code libraries
Context7
Gives your assistant the current docs for code libraries, so it stops using old commands.
Test: installs cleanly; its main features need an account we did not use. Not yet used on real work.
Good forWeb developers, Build an appWatch outYour library question goes to a hosted service run by Upstash.
For any assistant
Paste this in the terminal
```
$ npx ctx7 setup
```
What it does and how we tested it
02
RecommendedconnectorPartly tested (needs an account)
Control a browser
Playwright MCP
Lets your assistant open web pages and click and type like you do.
Test: installs cleanly; its main features need an account we did not use. Not yet used on real work.
Good forWeb developers, Build an app, Daily work and researchWatch outIt controls a real browser and can open any web address, fill forms and click buttons. Do not point it at pages where a click can cost money or send messages.
For Claude Code Also works with Codex CLI and Gemini CLI — see all steps
Paste this in the terminal
```
$ claude mcp add playwright npx @playwright/mcp@latest
```
Other ways to install, and how we tested it
03
agentInstalls cleanly
Plan and review code changes
Feature Dev plugin (Anthropic)
Three helpers that look at your code, plan a change and check it before you accept it.
Test: installs cleanly and works without an account. Not yet used on real work.
Good forWeb developers, Build an appWatch outThe agents read your code and can edit files in the project. Use a project under version control.
For Claude Code
Type this inside Claude Code
```
> /plugin install feature-dev@claude-plugins-official
```
What it does and how we tested it
04
skillPartly tested (needs an account)
Build phone apps
Expo Skills
Helps the assistant build phone apps.
Test: installs cleanly; its main features need an account we did not use. Not yet used on real work.
Good forBuild an app, Web developersWatch outSome skills run build and project commands (npm, expo, eas). Read each command before you approve it.
For Claude Code Also works with Codex CLI — see all steps
Paste this in the terminal
```
$ claude plugin install expo@claude-plugins-official
```
Other ways to install, and how we tested it
05
connectorPartly tested (needs an account)
Design n8n automations
n8n-MCP
Helps your assistant design n8n automations from the real node docs.
Test: installs cleanly; its main features need an account we did not use. Not yet used on real work.
Good forBuild an app, Daily work and researchWatch outIf you add an n8n API key, the agent can create and change workflows in your n8n. The author warns: never let the agent edit production workflows directly. Work on a copy.
For any assistant
Paste this in the terminal
```
$ npx n8n-mcp
```
What it does and how we tested it
06
skillPartly tested (needs an account)
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.
Test: installs cleanly; its main features need an account we did not use. Not yet used on real work.
Good forBuild an app, Web developersWatch outPayments are high stakes. Use a test-mode key first. Never paste a live secret key into a chat.
For Claude Code Also works with Codex CLI and Gemini CLI — see all steps
Paste this in the terminal
```
$ claude plugin install stripe@claude-plugins-official
```
Other ways to install, and how we tested it

Superpowers Pack · early access

Premium superpowers in the Superpowers Pack

We have not planned a skill of our own for build yet. The free picks on this page are our advice for now.

Free picks (tested by us)

Current docs for code libraries

Control a browser

Plan and review code changes

Build phone apps

Design n8n automations

Add payments with Stripe

Premium superpowers in the Superpowers Pack