What coverage report formats can this skill analyze?

The skill can parse and analyze standard coverage-summary.json files as well as lcov.info formats commonly generated by tools like Istanbul or Jest.

Does this skill support JavaScript monorepos?

Yes, the skill includes a workspace parameter that allows you to target specific packages within a monorepo structure using the npm workspace flag.

Can I check coverage for a single file instead of the whole project?

Yes, you can use the 'files' parameter to restrict the coverage generation and analysis to specific source files or utility paths.

How does this skill help in AI-assisted development?

It provides Claude with structured data about which parts of the code are untested, allowing the AI to suggest or write specific tests to fill those gaps accurately.

JS Test Coverage Generator

Name: JS Test Coverage Generator
Author: cuioss

bycuioss

•

Security & Testing

Generates and analyzes JavaScript test coverage reports to identify untested code paths and improve application reliability.

The JS Test Coverage Generator is a specialized skill for Claude Code designed to automate the lifecycle of test coverage assessment within JavaScript environments. It executes coverage commands via npm, parses raw build logs into structured data, and performs a detailed analysis of line and branch coverage across your project or specific workspaces. By identifying files with low coverage, it provides actionable insights that allow AI coding assistants to precisely target areas needing additional unit or integration tests, ensuring high code quality standards are maintained within the Plan Marshall orchestration layer.

Key Features

01Automated coverage report generation using npm scripts

021 GitHub stars

03Seamless integration with test implementation workflows

04Support for monorepo environments via workspace parameters

05Automated identification of low-coverage files and directories

06Structured analysis of LCOV and JSON coverage summaries

Use Cases

01Auditing a project to find files with insufficient test coverage

02Validating test health before refactoring critical utility functions

03Generating coverage metrics for a specific workspace in a monorepo

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add cuioss/plan-marshall js-generate-coverage

For use in Claude.ai and ChatGPT

Download Skill