Webapp Testing
Official skill for driving a browser to test a web app and reporting what broke.
Use it for
Smoke-testing a flow after a refactor, with screenshots and console errors as evidence
Skip it if
Visual design review; it checks behaviour and DOM state, not whether something looks right
What it is
An official testing skill that launches a browser, walks through a flow, and collects evidence: DOM snapshots, screenshots, console output. It is aimed at the gap between ‘the build passed’ and ‘the page works’. Pair it with a local dev server; it is not a load-testing tool.
Install
Clone the repository, then copy the skill folder into your agent's skills directory — ~/.claude/skills/ for Claude Code. Skills are plain files: no build step, no daemon.
npx skills add https://github.com/anthropics/skillsHow to judge it
Read the SKILL.md before you install. A good skill states when it applies, what it must not do, and how to verify the result. A skill that only lists adjectives will change the agent's tone without improving its output — skip those.
Other Coding & Dev skills
- Web Artifacts Builder — Official skill for building a self-contained web app as a single artifact.
- Superpowers — An agentic skills framework: planning, execution, and review as reusable skills.
- Agents Skill Collection — A curated set of specialist agents and their skills, organised by domain.