Individual skill
test-coverage-design
Use when deciding what to test, reviewing whether a feature is adequately covered before calling it done, or when tests pass but you're unsure they exercise the real risks. Derives coverage obligations from code + spec, finds gaps (including paths outside the test runner's scope), and designs a minimal, edge-case-first test set. Dispatches the coverage-analyst subagent. Generic (language-agnostic).
skills/test-coverage-design/SKILL.md
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- Jul 31, 2026
- License
- MIT
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- superpowers Repository topic
- skills Repository topic
- subagent-driven-development Repository topic
- claude-plugin Repository topic
- claude-code Repository topic
- llm Repository topic
- context-engineering Repository topic
- cpp Repository topic
- harness-engineering Repository topic
- agent-skills Repository topic
- design Derived category
- testing Derived category
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SKILL.mdcore · 5,575 bytescoverage-reference.mddoc · 6,174 bytes
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# Test Coverage Design
A passing test suite proves only that *the tests you wrote* pass — not that they exercise what the
feature actually requires or where the code is actually risky. This skill is the **post-implementation**
discipline for closing that gap: derive what *must* be tested, check it against what the suite runs, and
design the smallest test set that covers it.
## Altitude — where this sits vs. superpowers TDD
| Phase | Owner | What |
|---|---|---|
| **Pre-implementation** (spec-driven, test-first) | superpowers `test-driven-development` | Red-green-refactor; write the failing test *before* the code. Deliberately **code-blind**. |
| **Post-implementation** (code-aware) | **this skill + `coverage-analyst`** | Read the actual code for risk; confirm the spec's obligations are met **and actually run**. |
