Modern web development

Steer coding agents to modern web platform APIs

Modern Web Guidance is a set of skills, stewarded by the Google Chrome, Microsoft Edge, Mozilla Firefox and MDN teams, that gives coding agents current guidance on web platform features instead of the older patterns common in their training data. It covers areas such as view transitions and animations, CSS layout with container queries and subgrid, performance work such as INP diagnostics, native forms and UI such as popovers and dialogs, and accessibility, with lightweight fallbacks rather than heavy polyfills. You install it with npx modern-web-guidance@latest install, or try it first by searching for a guide, retrieving one by ID, or scanning a codebase for legacy patterns. You get front-end code that uses current browser APIs.