markdownlint‑github is a small npm package that supplies GitHub’s preferred markdownlint configuration together with a handful of custom rules (e.g., enforcing meaningful alt text and link text). It’s intended for developers who write documentation, READMEs, or other Markdown files in open‑source or internal GitHub projects and want to enforce GitHub‑specific style and accessibility standards via markdownlint‑cli2 (and optionally the VS Code extension).