web

name	web
description	Universal web development principles — accessibility (WCAG 2.2), performance (Core Web Vitals), security headers (OWASP), SEO, responsive design, error UX, and loading states. Framework-agnostic.
version	2.0.0
type	knowledge
layer	domain
requires	{"sage":">=1.0.0"}
activates-when	{"detected":["react","vue","svelte","angular","next","nuxt","astro","remix","gatsby","vite","webpack","html"]}
tags	["react","vue","svelte","angular","next"]

web

Layer 1 — Domain Foundation (v2.0)

Universal web development principles that apply to every web project regardless of framework. React, Vue, Svelte, vanilla JS — these principles hold.

Philosophy

This pack encodes the foundational web platform knowledge that agents frequently get right in isolation but miss in practice. An agent knows what ARIA labels are. It still produces a form with no error announcements for screen readers. An agent knows about Core Web Vitals. It still renders a 2MB hero image without dimensions.

The gap isn't knowledge — it's consistent application.

What's Included

Type	Count	Coverage
Patterns	7	Accessibility (WCAG 2.2), performance (Core Web Vitals), security headers (OWASP), SEO, responsive design, error UX, loading states
Anti-patterns	6	Div soup, missing alt text, layout shift, unprotected forms, client-only critical paths, no security headers
Constitution	7	principles

Grounded in: W3C WCAG 2.2 (October 2023), Google Core Web Vitals (2025), OWASP Secure Headers Project, OWASP CSP Cheat Sheet, MDN Web Docs, Web Almanac 2025, European Accessibility Act (June 2025).

What This Pack Does NOT Cover

• Framework-specific patterns (see react, nextjs, etc.)
• CSS methodology opinions (BEM vs utility-first vs CSS-in-JS)
• Build tool configuration (Webpack, Vite, Turbopack)
• Backend/API patterns (see api or baas)