How do I install the Snapshot Writer skill?

Run npx skillmds@latest add modbender/snapshot-writer in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Snapshot Writer safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Snapshot Writer?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Snapshot Writer free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Snapshot Writer?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Snapshot Writer by modbender — Agent Skill

Name: Snapshot Writer
Rating: 4.5 (4 reviews)
Author: modbender

File contents

Snapshot Test Writer

Snapshot tests are the fastest way to catch unintended UI changes. But writing them for every component gets tedious fast. This tool reads your React components and generates snapshot tests automatically. It figures out the props, renders the component, and creates the snapshot assertions.

One command. Zero config. Just works.

Quick Start

npx ai-snapshot-test src/components/

What It Does

Reads React components and generates Jest snapshot test files
Automatically detects props and creates test cases with different prop combinations
Handles components with context providers and wrapper dependencies
Generates both default state and edge case snapshots
Outputs .test.tsx files ready to run with Jest

Usage Examples

# Generate snapshot tests for all components
npx ai-snapshot-test src/components/

# Target a specific component
npx ai-snapshot-test src/components/Button.tsx

# Scan all TSX files in a directory
npx ai-snapshot-test "src/**/*.tsx"

Best Practices

Generate snapshots early in development - Easier to maintain when you start small
Update snapshots intentionally - When a snapshot fails, check if the change was intended before updating
Don't snapshot everything - Focus on components with stable output. Highly dynamic components make bad snapshot candidates.
Keep snapshot files in version control - They're your visual contract

When to Use This

You're building a component library and need regression protection
A redesign changed a bunch of components and you need to update test coverage
You want to catch accidental rendering changes during refactors
Your team requires snapshot tests but nobody wants to write them

Part of the LXGIC Dev Toolkit

This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.

Find more:

GitHub: https://github.com/LXGIC-Studios
Twitter: https://x.com/lxgicstudios
Substack: https://lxgicstudios.substack.com
Website: https://lxgic.dev

Requirements

No install needed. Just run with npx. Node.js 18+ recommended.

npx ai-snapshot-test --help

How It Works

The tool parses your React component files to extract the component signature, props interface, and any dependencies. It then generates test files that import the component, render it with various prop combinations, and create toMatchSnapshot assertions. The output is compatible with Jest's snapshot testing.

License

MIT. Free forever. Use it however you want.

---name: snapshot-writerdescription: Generate Jest snapshot tests for React components. Use when you need snapshot coverage for your UI components.--- # Snapshot Test Writer Snapshot tests are the fastest way to catch unintended UI changes. But writing them for every component gets tedious fast. This tool reads your React components and generates snapshot tests automatically. It figures out the props, renders the component, and creates the snapshot assertions. **One command. Zero config. Just works.** ## Quick Start ```bash npx ai-snapshot-test src/components/ ``` ## What It Does - Reads React components and generates Jest snapshot test files - Automatically detects props and creates test cases with different prop combinations - Handles components with context providers and wrapper dependencies - Generates both default state and edge case snapshots - Outputs .test.tsx files ready to run with Jest ## Usage Examples ```bash # Generate snapshot tests for all components npx ai-snapshot-test src/components/ # Target a specific component npx ai-snapshot-test src/components/Button.tsx # Scan all TSX files in a directory npx ai-snapshot-test "src/**/*.tsx" ``` ## Best Practices - **Generate snapshots early in development** - Easier to maintain when you start small - **Update snapshots intentionally** - When a snapshot fails, check if the change was intended before updating - **Don't snapshot everything** - Focus on components with stable output. Highly dynamic components make bad snapshot candidates. - **Keep snapshot files in version control** - They're your visual contract ## When to Use This - You're building a component library and need regression protection - A redesign changed a bunch of components and you need to update test coverage - You want to catch accidental rendering changes during refactors - Your team requires snapshot tests but nobody wants to write them ## Part of the LXGIC Dev Toolkit This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work. **Find more:** - GitHub: https://github.com/LXGIC-Studios - Twitter: https://x.com/lxgicstudios - Substack: https://lxgicstudios.substack.com - Website: https://lxgic.dev ## Requirements No install needed. Just run with npx. Node.js 18+ recommended. ```bash npx ai-snapshot-test --help ``` ## How It Works The tool parses your React component files to extract the component signature, props interface, and any dependencies. It then generates test files that import the component, render it with various prop combinations, and create toMatchSnapshot assertions. The output is compatible with Jest's snapshot testing. ## License MIT. Free forever. Use it however you want.

Frequently asked questions

Snapshot Writer