🧪 Skill
This skill captures before-and-after screenshots for visual UI comparisons by comparing two URLs or images.
npx playbooks add skill vercel-labs/before-and-after --skill skill
About Skill
This skill captures before-and-after screenshots for visual UI comparisons by comparing two URLs or images, enabling developers to test and verify changes in their application's user interface. It connects to web applications through URLs, allowing for automated visual testing. A developer would reach for this skill when they need to verify that updates to their application's UI have not introduced unintended visual changes.
This compact 15-word instruction set is purpose-built for testing & qa work in AI coding agents. Install with a single command.
Use Cases
- Writing unit, integration, and end-to-end tests
- Setting up test coverage and CI pipelines
- Refactoring legacy code with confidence using tests
- Creating test plans and QA checklists
Example Prompts
System Prompt (15 words)
This skill captures before-and-after screenshots for visual UI comparisons by comparing two URLs or images.
Frequently Asked Questions
What is Skill?
Skill is a free testing & qa skill for AI coding agents. This skill captures before-and-after screenshots for visual UI comparisons by comparing two URLs or images.. It provides a specialized system prompt that configures your agent with testing & qa expertise.
How do I use Skill with Claude Code?
Run npx playbooks add skill vercel-labs/before-and-after --skill skill in your terminal to install Skill into your Claude Code session. It works immediately after installation.
Which AI coding agents work with Skill?
Skill is compatible with Claude Code, Cursor, GitHub Copilot, Windsurf, OpenClaw, Cline, and any AI agent that supports custom system prompts or .cursorrules files.
Is Skill free to use?
Yes, Skill is completely free and open source. The full source is available on GitHub at https://github.com/vercel-labs/before-and-after/tree/main/skill. You only need a subscription to the AI agent you use it with.
