a11y-spec-first-skill

MANDATORY: Read this skill before writing, reviewing, or advising on ANY code involving TypeScript, JavaScript, HTML, CSS, SCSS, ARIA, SVG, or web APIs — including snippets, components, audits, patterns, and copy-edit responses. Also triggers for any WCAG success criterion discussion, AT behaviour question, browser API investigation (Popover, Dialog, Anchor Positioning, etc.), or accessibility specification reference. This skill ensures Claude consults the correct, current specification before responding — never training-data recall alone. Non-negotiable.