See it in action

You say

Build a regression test suite for my commit-message-generator skill. I need to ensure it always follows the imperative mood and never includes JIRA keys in the subject.

Your agent does

Created /tests directory for commit-message-generator.

Generated scenarios.yaml with 5 test cases (happy path, long diff, JIRA edge case).
Created deterministic_checks.py to validate regex formatting and char limits.
Set up run_tests.sh for CI integration.

About this skill

Teaches AI coding agents to build and run automated regression tests for SKILL.md files. When you update a skill that your team depends on, you need to know it still works — not just that it "looks right." This skill provides a structured eval framework that tests skills against known inputs and expected outputs, catching regressions before they silently break your agent's behavior. For engineering teams that maintain shared SKILL.md libraries and need deterministic confidence in every update.

testing

eval-driven-development