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Web App Testing (Playwright)

Test local web apps in a real browser: clicks, screenshots and console logs.

Official Anthropicby AnthropicChecked October 18, 2026

Anthropic's example skill for checking that a local web app actually works. Claude starts your server, drives a Playwright browser, captures screenshots and reads logs to confirm behavior.

Who it is for

  • Developers
  • QA testers
  • Vibe coders

Prompts to try

Once the skill is installed, ask for the result in plain words. Claude picks the skill up on its own.

Prompt 1
Start my app and test that the signup form works end to end
Prompt 2
Take screenshots of every page on localhost:3000
Prompt 3
Check the browser console for errors on the checkout page

How to install it

In Claude Code

  1. /plugin marketplace add anthropics/skills
  2. /plugin install example-skills@anthropic-agent-skills

In Claude.ai

Not practical in Claude.ai because it needs a local app and browser; use Claude Code.

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How we checked it

Confirmed SKILL.md at skills/webapp-testing/SKILL.md in anthropics/skills via the GitHub API; skill folder last changed 2026-04-20, repo has 181,779 stars and was pushed 2026-10-09.

Source: github.com/anthropics/skills/tree/main/skills/webapp-testing

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