Create your agent-tdd skill in one prompt, then learn to improve it throughout the chapter
Full skill instructions
Before learning how to test AI agents, you'll own a testing skill.
This chapter teaches TDD (Test-Driven Development) for agent code—the deterministic tests that verify your code works correctly, runs fast, and costs nothing. By the end, you'll have a comprehensive test suite for your Task API with 80%+ coverage and zero LLM API calls during testing.
But you won't learn testing patterns and then maybe build a skill later. You'll build the skill first, then spend the chapter improving it with every lesson.
cd claude-code-skills-lab
claude
Copy and paste this prompt:
Using your skill creator skill create a new skill for testing AI agent code
with pytest. I will use it to test FastAPI endpoints, mock LLM calls, and
test agent pipelines from hello world to production test suites.
Use context7 skill to study official pytest-asyncio and respx documentation
and then build it so no self assumed knowledge.
Claude will:
Your skill appears at .claude/skills/agent-tdd/.
You now own an agent-tdd skill built from official documentation. The rest of this chapter teaches you what it knows—and how to make it better.
Every lesson ends with a "Reflect on Your Skill" section where you'll test your skill, identify gaps, and improve it. By the capstone, your skill will generate complete test suites from specifications.
Next: Lesson 1 — TDD Philosophy for Agents
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