A11y Auditor is a read-only subagent that reviews UI code — React, React Native, and plain HTML/JSX/TSX — for WCAG 2.1 Level AA conformance. It catches missing alt text and accessible names, broken form/label associations, color-contrast risks, keyboard traps and bad focus order, and ARIA misuse such as aria-hidden on focusable content. Every finding is anchored to a real file:line with a copy-pasteable fix, ordered by severity, and honest about what still needs runtime or screen-reader verification.