Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.
webapp-testing
webapp-testing is an open-source testing skill for Claude Code and compatible agents, published by anthropics. Its author describes it as: “Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.”. The project has 167k stars on GitHub and does not declare a license, so check with the author before reuse. Add it to your setup with `/plugin marketplace add anthropics/skills`.
Installation
Add webapp-testing to your agent with:
/plugin marketplace add anthropics/skillsAlways review a skill's source before installing it. This command comes from the skill's public repository; the linked repo is the source of truth for exact setup steps.
When to use it
Reach for webapp-testing when you want testing help from your agent without writing the same instructions every session. Load the skill and the agent picks it up automatically for relevant tasks.
Strengths
- Ships in anthropics/skills, an established project with 166,577 GitHub stars
- Actively maintained (recent commits)
Things to check
- No license declared — confirm terms with the author before reuse
Topics
Frequently asked questions
- What does webapp-testing do?
- Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
- How do I install webapp-testing?
- Run /plugin marketplace add anthropics/skills in your agent, then reload your skills. Review the source at https://github.com/anthropics/skills before installing.
- Is webapp-testing free to use?
- webapp-testing is publicly available on GitHub, but anthropics has not declared a standard open-source license (No license). Confirm the terms with the author before reusing it.
- Where does webapp-testing come from?
- webapp-testing ships inside anthropics/skills, a repository that contains 19 catalogued skills in total. The repository's 166,577 GitHub stars apply to that whole collection, not to this skill on its own.
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