Vibe Coding — Web Design Guidelines

Review UI code against Vercel's Web Interface Guidelines.

Entry Router

Fetch live guidelines first:
  URL: https://raw.githubusercontent.com/vercel-labs/web-interface-guidelines/main/command.md
  Fetch failed? → Note "Using cached guidelines (fetched [today's date])" and use fallback rules below.
  Fetch succeeded? → Note version/date from response if available; if no date available, note "Live fetch — no version date in response."

Then read target file(s) and run all 6 category checks.
Accessibility findings are always MUST FIX (highest severity).