Summary
This puts tests first in your development workflow, red-green-refactor style. Write a failing test, make it pass with minimal code, then clean up. The real win is the Prove-It Pattern for bugs: reproduce the issue with a test before you fix anything, so you know it's actually fixed and won't regress. The guide includes practical stuff like the test pyramid (80% unit, 15% integration, 5% E2E), testing state over interactions, and when to use real implementations versus mocks. If you're working with an AI agent on a codebase without tests, you're flying blind. This gives you the proof that changes actually work.
Install to Claude Code
npx -y skills add addyosmani/agent-skills --skill test-driven-development --agent claude-codeInstalls into .claude/skills of the current project.
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Featured
belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →
