GitHub launches plugin to evaluate alt text quality beyond basic automated checks

GitHub has developed a new plugin for its Accessibility Scanner tool aimed at improving the quality of image alt text in code repositories. The plugin goes beyond standard automated checks, which typically only verify whether alt text exists rather than whether it is meaningful. Many alt text descriptions pass basic validation yet fail to convey useful information to users relying on screen readers. The new tool is designed to assess whether alt text is genuinely accessible and descriptive. GitHub shared details of how the plugin works in a post on its official blog.