Overview
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 177k stars on GitHub and ships custom license terms, so review them before reuse. Add it to your setup with `/plugin marketplace add anthropics/skills`.
What webapp-testing does
To test local web applications, write native Python Playwright scripts.
Best for
What’s inside
The SKILL.md for webapp-testing is organised into these sections:
- Decision Tree: Choosing Your Approach
- Example: Using withserver.py
- Reconnaissance-Then-Action Pattern
- Common Pitfall
- Best Practices
- Reference Files
Installation
Add webapp-testing to your agent with:
/plugin marketplace add anthropics/skillsReview a skill’s source before installing it — skills can instruct your agent to run commands. This command comes from the skill’s public repository, which is the source of truth for setup steps. New to skills? Read how to install Claude Code skills.
Supported agents
- Claude Code — ships a claude code plugin marketplace
License
anthropics has not declared a standard open-source license for this repository (Complete terms in LICENSE.txt). Confirm the terms with the author before reusing it.
Strengths
- Ships in anthropics/skills, an established project with 177,416 GitHub stars
- Works with Claude Code
- Actively maintained — repository updated in the last 30 days
- Its repository gained 12,054 GitHub stars over the last 52 days
Things to check
- No license declared — confirm terms with the author before reuse
Author
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 (Complete terms in LICENSE.txt). Confirm the terms with the author before reusing it.
- Which agents does webapp-testing work with?
- webapp-testing lists Claude Code — named in its SKILL.md, its plugin marketplace or its repository topics. Skills use the portable SKILL.md format, so other agents that read that format may load it too.
- Where does webapp-testing come from?
- webapp-testing ships inside anthropics/skills, a repository that contains 21 catalogued skills in total. The repository's 177,416 GitHub stars apply to that whole collection, not to this skill on its own.
