Does it provide a historical view of test coverage?

Yes, it tracks coverage trends over time and by sprint, allowing you to see if your testing quality is improving or declining as the codebase grows.

Can it tell me exactly which lines of code are not tested?

Yes, it identifies specific line ranges and logic branches that are not executed by your test suite, helping you target your testing efforts precisely.

Which coverage report formats does this skill support?

The skill supports multiple standard formats including lcov, Cobertura, Istanbul (nyc), Jest, coverage.py, Jacoco, and Go test output.

How does the skill prioritize which tests I should write first?

It uses a priority calculation based on code complexity, recent change frequency, and whether the code resides in a business-critical path like auth or payments.

Test Coverage Analyst

Name: Test Coverage Analyst
Author: jmagly

byjmagly

•

Security & Testing

Analyzes codebase test coverage, identifies critical gaps, and provides prioritized recommendations for improving software quality.

The Test Coverage Analyst skill automates the evaluation of test suite effectiveness by parsing various coverage report formats such as lcov, Cobertura, and Istanbul. It goes beyond simple percentages by mapping coverage to business requirements, identifying high-risk untested paths, and tracking coverage trends over time. This skill is essential for developers who need to maintain high quality standards, as it provides actionable insights into exactly where tests are missing and how to improve them with the least amount of effort for the highest impact.

Key Features

01Detailed analysis of line, branch, and function-level coverage metrics

02Automated test recommendations with estimated effort and coverage gain

03Multi-format report parsing including lcov, Cobertura, and Istanbul

04Requirement traceability mapping to ensure feature-complete testing

0567 GitHub stars

06Priority-based gap identification for high-risk and high-change files

Use Cases

01Automating coverage audits during code reviews or before releases

02Identifying specific logic branches missed by existing unit and integration tests

03Creating a strategic roadmap to reduce testing debt in legacy codebases

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jmagly/ai-writing-guide test-coverage

For use in Claude.ai and ChatGPT

Download Skill