Michael Waitze

Chrome just released Modern Web Guidance 1.0 to steer AI coding agents toward native web standards. Here's what you need to know. The Chrome for Developers account put the problem bluntly. Left to their own devices, AI coding agents will happily write 100 lines of custom JavaScript for something modern HTML and CSS can do natively in a few lines. The cause is old training data, so models keep reaching for outdated patterns. Modern Web Guidance is a set of skills that embeds web platform expertise, best practices, and browser compatibility data directly into your coding agents. Version 1.0 was announced on Nov 11, 2026 and ships with 200+ expert-reviewed guides plus Baseline support. It also adds a new modernization workflow that scans existing code. It was built in partnership with Firefox, MDN, and Microsoft Edge, so it is meant to work across every browser. Chrome's team says the knowledge is open and updated as the platform evolves. Examples cited include native dialogs and popovers instead of div modals, and not lazy loading the hero image. It plugs into Google Antigravity, Cursor, GitHub Copilot, WebStorm, Codex, Kimi, Grok, and more. It covers performance, accessibility, security, and state of the art web tech. Install it with: npx modern-web-guidance@latest install Key numbers: - 200+ expert guides in 1.0 - Over 90% fewer UI bugs on new screens, per the team - 90% of failed performance checks resolved - Guided agent runs pass 88% of real browser checks vs 56% without, as reported by one developer - An earlier internal Google benchmark showed a 37 point jump in best-practice adherence - 4 partners: Chrome, Firefox, MDN, Edge There is also a public evals dashboard that tests the project against each model, showing the uplift from no guidance to guided outcomes.