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Generates tests that capture current behavior of existing code before refactoring.
Passed 17 of 21 test cases with the skill, and 12 of 21 without it.
and 6 more in the full report
6 fixed12 passed either way3 still failing1 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 5 test cases the skill fixed. Same model, same prompt, with and without the skill.
What Markdown table structure and exact column names should be used in the coverage summary report when characterizing code?
| Checked | Without skill | With skill |
|---|---|---|
| Uses table column headers Class, Methods Covered, Edge Cases, and Notes | Missed | Passed |
The instructions your model reads when the skill loads.
Generate tests that document what existing code actually does — not what it should do. These tests capture current behavior so you can refactor with confidence, especially when using AI to modify code.
Use this skill when the user:
AI refactoring is powerful but risky:
Glob: **/*.swift (in the target module)
Grep: "class |struct |enum |protocol |func " (public API surface)
Identify:
test cases passed, vs 12 / 21 without
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