Can it identify specific lines of untested code?

Yes, it can pinpoint exact line ranges and specific logic branches that are not executed during your test suite runs.

How does it prioritize which tests to add first?

It uses priority factors like business criticality (e.g., auth or payment paths), recent code changes, cyclomatic complexity, and bug history.

Can I set up coverage gates with this skill?

Absolutely. It allows you to configure global and per-file thresholds for line, branch, and function coverage to enforce quality in CI/CD.

What coverage formats does this skill support?

The skill supports multiple industry-standard formats including LCOV, Cobertura, Istanbul (nyc/jest), Jacoco, and Go test output.

Does this skill help with requirement traceability?

Yes, it integrates with traceability data to identify which business requirements are missing corresponding test coverage.

Test Coverage Analysis

Name: Test Coverage Analysis
Author: jmagly

byjmagly

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102

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Security & Testing

Analyzes test coverage reports to identify untested code paths, prioritize gaps, and recommend specific test implementations to improve software quality.

The Test Coverage skill automates the evaluation of your codebase's testing health by parsing various coverage formats like LCOV, Cobertura, and Istanbul. It goes beyond simple percentages by mapping coverage to business requirements, identifying high-risk untested files, and tracking performance trends over time. This skill is essential for maintaining high-quality standards, preventing regressions, and providing actionable insights for developers looking to systematically reduce testing debt within the Claude Code environment.

Key Features

01Priority-based gap identification for business-critical paths

02Multi-format coverage parsing for JavaScript, Python, Java, and Go

03Automated test recommendations with estimated implementation effort

04102 GitHub stars

05Requirement-to-test mapping and traceability analysis

06Historical trend tracking and CI/CD coverage gate configuration

Use Cases

01Generating detailed coverage reports to justify 'test debt' sprints to stakeholders

02Auditing critical modules like authentication and payments for security-related test gaps

03Identifying untested logic in newly developed features before deployment

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jmagly/aiwg test-coverage

For use in Claude.ai and ChatGPT