write-check-links

Checks the links in a Markdown file with lychee and the Hugo site's lychee.toml, then triages every failure as broken, known false positive, or unverified, with the source line and a fix. Also checks Hugo {{< ref >}} targets and root-relative /blog/ links against hugo/content, which lychee cannot see. Use when the user says /write:check-links, wants to validate links, check for broken links or dead URLs, verify URLs in a post before publishing, or asks "is anything broken in this article".