The docs site scores 100 on Lighthouse accessibility and has solid semantic HTML throughout. These changes add landmark labels and a skip link to further improve navigation for screen reader and keyboard-only users.

Issues identified using Tactual, a screen-reader navigation cost analyzer:

• No skip-to-content link. Keyboard users must Tab through 36–50 items (header + entire sidebar) to reach page content.
• Sidebar is not a navigation landmark. Screen reader users cycling landmarks cannot jump to the docs sidebar — it renders as a <div>.
• Landmarks are unlabeled. The <header>, <footer>, and <nav> have no aria-label, making them indistinguishable when navigating by landmark.

Changes (zero visual impact except skip link on Tab focus)

Note: the sidebar.tsx change is in the registry — it improves the distributed Sidebar component for projects using collapsible="none".

Verification

• NVDA screen reader testing (Windows): all landmarks announced correctly when cycling with D key
• Skip link: Tab → "Skip to content" appears → Enter → focus moves to main content
• Tabbing past sidebar: reduced from 36–50 Tab presses to 1 (skip link) or 1 landmark jump (D key)
• Visual regression: zero difference except skip link on focus
• Lint, typecheck, prettier: all pass

🤖 AI-assisted (Claude). All changes manually verified with NVDA.