Coverage Badge Creator

Name: coverage-badge-creator
Author: Henry Steinhauer

A zero-dependency GitHub Action and npm CLI that reads your test coverage report and inserts live SVG badges into your README automatically. Works for any language — Python, Go, Java, Ruby, JavaScript, TypeScript, .NET and more.

How it works

Add a $coverage$ token anywhere in your README.
Run your tests to produce a coverage report.
Run the Action (or npm script) — the token is replaced with a live badge.

Supported formats

istanbul — Jest, NYC, Istanbul (default)
lcov — Go, C/C++, Ruby, Python (lcov reporter)
cobertura — Java (JaCoCo), Python (coverage xml), .NET
coverage-py — Python (coverage json)

GitHub Action quickstart

- uses: H3nSte1n/coverage-badge-creator@v2
  with:
    format: istanbul
    commit: true

npm quickstart

npm install --save-dev coverage-badge-creator