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Use when implementing any feature or bugfix, before writing implementation code
Passed 19 of 22 test cases with the skill, and 15 of 22 without it.
and 3 more in the full report
4 fixed15 passed either way3 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
I manually tested all 15 edge cases of our checkout calculation function in Postman and verified every response manually. Can I skip automated TDD tests for this feature?
| Checked | Without skill | With skill |
|---|---|---|
| The response must state that manual testing cannot replace automated test-driven development. | Missed | Passed |
| The response must explain that manual testing lacks automated repeatability. | Passed | Passed |
The instructions your model reads when the skill loads.
Write the test first. Watch it fail. Write minimal code to pass.
Core principle: If you didn't watch the test fail, you don't know if it tests the right thing.
Violating the letter of the rules is violating the spirit of the rules.
Always:
Exceptions (ask your human partner):
Thinking "skip TDD just this once"? Stop. That's rationalization.
NO PRODUCTION CODE WITHOUT A FAILING TEST FIRST
Write code before the test? Delete it. Start over.
No exceptions:
Implement fresh from tests. Period.
test cases passed, vs 15 / 22 without
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