web-conventions

Generic, composable web platform conventions — semantic HTML, accessibility, modern CSS, custom-property design tokens, and Baseline browser-support policy that apply across all web frontends (static sites, web component SPAs). Meant to be composed with context-specific skills (e.g. web-static, web-components). Use when writing, generating, or reviewing HTML or CSS anywhere the composed skill does not already specify a rule. Triggers on "web conventions", "semantic HTML", "web forms", "form validation", "input types", "accessibility review", "modern CSS", "design tokens", "DESIGN.md", "Baseline status", "serve the site", "dev server", "zws", or any request to write or review HTML/CSS. Also use when a project contains a DESIGN.md that should guide HTML/CSS generation, when a Baseline status must be looked up (bundled webstatus.dev snapshot in references/baseline-snapshot.md), or when a static site root needs to be served locally (bundled zws dev server in scripts/zws).