Will it create an overwhelming number of tests?

No, the skill has built-in safety limits of 30 path analyses and 20 test generations per audit to ensure it focuses only on the highest-impact coverage gaps.

Can I use this during code reviews?

Absolutely. It is designed to complement code reviews by providing a quantitative assessment of test completeness, helping teams make informed ship/no-ship decisions.

How does this differ from standard code coverage tools?

Traditional tools measure which lines were executed, whereas this skill traces logical paths, including untested error branches and guard clauses that simple execution counters might miss.

Does it support my specific testing framework?

Yes, the skill automatically detects your project's testing conventions—such as Jest, Vitest, Pytest, or Go Test—and generates new tests that match your existing style and directory structure.

Test Coverage Audit

Name: Test Coverage Audit
Author: nyldn

bynyldn

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3,216

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Security & Testing

Traces logical codepaths in diffs to identify untested branches and automatically generates missing tests for critical edge cases.

The Test Coverage Audit skill provides an automated, path-based analysis of code changes to ensure comprehensive testing before deployment. Unlike standard line coverage tools that only track executed lines, this skill traces logic branches, error paths, and guard clauses to identify hidden blind spots. It maps existing tests against these specific paths, produces detailed visual coverage diagrams, and auto-generates production-grade tests that follow your project's established conventions, frameworks, and naming patterns, ensuring that high-risk logic is never shipped without verification.

Key Features

01Visual ASCII coverage reports with risk-based prioritization

02Project-aware test generation matching local style and frameworks

033,216 GitHub stars

04Deep codepath tracing including error branches and guard clauses

05Automated mapping of existing test files to specific logic paths

06Qualitative coverage scoring (Smoke, Happy Path, Full coverage)

Use Cases

01Auto-generating unit test suites for newly written functions

02Auditing legacy code to visualize testing gaps in critical business logic

03Identifying untested error paths in a Pull Request before merging

Key Features

01Visual ASCII coverage reports with risk-based prioritization

02Project-aware test generation matching local style and frameworks

033,216 GitHub stars

04Deep codepath tracing including error branches and guard clauses

05Automated mapping of existing test files to specific logic paths

06Qualitative coverage scoring (Smoke, Happy Path, Full coverage)

Use Cases

01Auto-generating unit test suites for newly written functions

02Auditing legacy code to visualize testing gaps in critical business logic

03Identifying untested error paths in a Pull Request before merging