Search Console lists docs.solidcraft.io/, /introduction.html (the same page) and /guide/mcp.html as duplicates without a user-selected canonical. The Pages build now adds a canonical link to every book page (index.html and introduction.html both name /), skips the redirect stubs that already have one, marks 404 and the toc frame noindex, and writes a robots.txt pointing at a generated sitemap.xml.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
