Web Application Testing

To test local web applications, write native Python Playwright scripts.

Use this skill when the task needs local server lifecycle management, custom Python assertions, or a repeatable test script. For ad-hoc browser navigation and interaction that does not need custom Python, use $playwright-cli.

Helper Scripts Available:

• scripts/with_server.py - Manages server lifecycle (supports multiple servers)

Always run helper scripts with --help first to see usage. DO NOT read the source until you try running the helper and find that a customized solution is absolutely necessary. These scripts can be very large and thus pollute your context window. They exist to be called directly as black-box scripts rather than ingested into your context window.

Dependency Preflight

Before writing a native Playwright script, verify the selected project environment: