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browser-testing

VERIFY your changes work. Measure CLS, detect theme flicker, test visual stability, check performance. Use BEFORE and AFTER making changes to confirm fixes. Includes ready-to-run scripts: measure-cls.ts, detect-flicker.ts

tasks/fix-visual-stability/environment/skills/browser-testing/SKILL.md

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# Performance Measurement with Playwright CDP

Diagnose performance issues by measuring actual load times and network activity.

**Playwright is pre-installed.** Just use the measurement script.

## Quick Start

A `measure.ts` script is included in this skill's directory. Find it and run:

```bash
# Measure a page (outputs JSON with waterfall data)
npx ts-node <path-to-this-skill>/measure.ts http://localhost:3000