Check snapshot tests Skill (SKILL.md)
- UI component tests
- API response tests
- tests on generated files
- What does this skill do?
- Checks snapshot tests for size, changing values and bulk updates, and proposes targeted assertions where a snapshot hides the intent.
- What do you put in?
- Code, a diff, logs or an error message.
- What do you get?
- weak snapshots with reason
- replacement per test
- review rule
- Works in
- Claude, ChatGPT, Gemini, Microsoft 365 Copilot, Cursor and other assistants
Skill instructions
This is how the AI works with this skill. Copy it or add it to your assistant as a file.
- Read snapshot tests and history as material.
- Mark large and often-updated snapshots.
- Mark changing values that cause noise.
- Propose targeted assertions.
- Suggest a review rule for changes.
View full text
--- name: snapshot-test-check description: "Reads snapshot tests, stored snapshots and recent update history. Useful when snapshot diffs are large or often accepted in bulk." license: "Free to use, including at work; do not republish as your own collection. AI Compare Ninja terms of use." --- # Check snapshot tests For every snapshot you ask: would a reviewer notice a wrong value in this diff? ## Steps 1. Read snapshot tests and history as material. 2. Mark large and often-updated snapshots. 3. Mark changing values that cause noise. 4. Propose targeted assertions. 5. Suggest a review rule for changes. ## Output - weak snapshots with reason - replacement per test - review rule ## Rules - Changes no tests itself. - Uses no customer data in examples. - Do not invent facts, figures, names, dates or commitments. If something is missing, write [missing: …] or ask. - Reply in the user's language unless asked otherwise. - Repeat only as much personal data as the task requires. - You deliver a draft. The decision and any sending stay with the human. Use: free, including at work · do not republish as your own collection · Source: AI Compare Ninja
As a file: Download (ZIP)
Install in Claude
- In Claude, open Settings and turn on “Code execution and file creation” under “Capabilities”.
- Go to “Customize” › “Skills”.
- Click “+”, then “Create skill” and “Upload a skill”.
- Choose the downloaded ZIP file. The skill appears in your list, where you can switch it on and off.
The ZIP file contains the folder “snapshot-test-check” with the file SKILL.md, exactly as Claude expects it. Do not unzip it; upload it as is.
Claude Code: unzip the file into ~/.claude/skills/ (for you) or .claude/skills/ in your project.
Steps per Anthropic's help pages, as of October 2026. Menu names are from the English interface and may differ in other languages or after updates. On Team and Enterprise accounts an admin must allow skills. Sources: https://support.claude.com/en/articles/12512180-use-skills-in-claude · https://claude.com/docs/skills/how-to
Use it in ChatGPT, Gemini and Copilot
ChatGPT: in Business, Enterprise and Edu workspaces you upload the file as a skill if your admin allows it. Gemini app: skills can be uploaded as SKILL.md or ZIP. Microsoft 365 Copilot: upload it as your own skill in Cowork. Codex, GitHub Copilot and Cursor read skills from the project folder .agents/skills/. Anywhere else, paste the text as instructions into a ChatGPT or Claude project or at the start of a chat.
According to the vendors' help pages, October 2026. Availability depends on plan, admin settings, age and region. Sources: https://help.openai.com/en/articles/20001066-skills-in-chatgpt · https://support.google.com/gemini/answer/17094296 · https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-customize · https://developers.openai.com/codex/skills · https://code.visualstudio.com/docs/copilot/customization/agent-skills · https://cursor.com/docs/context/skills
Use, safety and notes
Text only, reviewed by us. This skill contains no scripts, no links and no calls to other services. It tells the AI not to invent anything and to leave the final decision to you.
AI results can be wrong or incomplete. Check them before you use or send them. Not legal, tax, financial or medical advice. No warranty.
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You may use and adapt our skills freely, including at work. Please do not republish them as your own collection. We give no warranty for AI results; check them yourself. Terms of use