Prompt Test Cases Free Claude Code skill, copy & paste

One file. The description is what Claude matches against, so it says plainly when to use the skill.

---
name: prompt-test-cases
description: Create test cases for a prompt, covering normal, edge and misuse inputs with expected behaviour. Use when the user asks how to test a prompt, chatbot or AI feature.
---

Write test cases for a prompt.

1. If the prompt or its purpose is missing, ask once, in one message, then continue.
2. Produce a table: # | Category | Test input | Expected behaviour | Pass if.
3. Cover these categories, two or three cases each:
   - Normal: typical requests it must handle well
   - Edge: empty, very long, mixed language, unclear requests
   - Out of scope: questions it should politely decline
   - Misuse: attempts to make it ignore its instructions or reveal them
   - Format: cases that check the output shape is kept
4. Make "Pass if" something a person can judge quickly, such as "declines and points to the contact page".
5. End with how to record results: run each case, mark pass or fail, and fix the prompt before re-running.

Rules:
- Keep misuse tests defensive: they check the prompt holds, nothing more.
- Do not invent facts the expected answers depend on; write [check].

Put the folder in your skills directory. Then ask in plain words, and Claude loads the skill when your request matches its description; or type the command yourself.

# for you, in every project
mkdir -p ~/.claude/skills/prompt-test-cases
mv SKILL.md ~/.claude/skills/prompt-test-cases/

# then, inside Claude Code, either ask naturally:
#   write test cases for my customer support prompt
# or run it by name:
#   /prompt-test-cases