webapp-testing

anthropics/skills/skills/webapp-testing

This skill provides instructions, example scripts, and a helper utility for testing local web applications using Python and Playwright. Its primary risk is that the helper script executes shell commands and controls a headless browser, which could be misused if an AI agent is tricked into testing untrusted pages or running malicious server commands.

What it can reach

Shell commands

The scripts/with_server.py utility runs user- or agent-supplied server start commands and test commands via subprocess.

Browser

Launches and automates a headless Chromium browser using Playwright.

Network

Polls local ports on localhost to check if development servers are ready and navigates to URLs in the headless browser.

Files

Reads local HTML files and saves browser screenshots and console logs to disk.

Findings

No findings.