Decide · coding-agent SKILL.md

anthropics/skills webapp-testing — Playwright + with_server.py black box

WhenUse when verifying frontend, screenshots, or browser logs against a local server.

StopNever ingest withserver.py source. Never skip --help. Never invent selectors after a failed guess without recon.

Steps

Launch chromium headless via syncplaywright.
Open the local URL the helper is serving.
Wait for load state networkidle (critical on dynamic apps — do not inspect before this).
Screenshot or read page.content / locators to discover selectors.
Run actions with those selectors.
Close the browser.

LoadPlaywright. scripts/withserver.py as a black box. Local app only.

---
name: anthropics/skills webapp-testing — Playwright + with_server.py black box
description: Use when verifying frontend, screenshots, or browser logs against a local server.
---

# anthropics/skills webapp-testing — Playwright + with_server.py black box

When: Use when verifying frontend, screenshots, or browser logs against a local server.
Stop: Never ingest withserver.py source. Never skip --help. Never invent selectors after a failed guess without recon.

1. Launch chromium headless via syncplaywright.
2. Open the local URL the helper is serving.
3. Wait for load state networkidle (critical on dynamic apps — do not inspect before this).
4. Screenshot or read page.content / locators to discover selectors.
5. Run actions with those selectors.
6. Close the browser.

Load: Playwright. scripts/withserver.py as a black box. Local app only.