Audit the documentation against Vercel writing guidelines using writing-guidelines

This is an introduction to Vercel Labs' Agent Skill "writing-guidelines": it reviews the tone, structure, readability and typesetting of documents and prose in accordance with the Vercel Writing Guidelines. The following details are covered: its attribution and version, the mechanism of pulling the remote `command.md` before each review, the coverage of over 80 rules, the `file:line` output format, as well as the installation and triggering methods using `npx skills add` in tools such as Cursor, Claude Code and Codex, plus notes including network dependencies and Vercel site-specific conventions.