Launch Proof - check a new site before it goes live

Check a new website or web app before it goes live, from what it actually serves. Paste the response headers, the HTML head, robots.txt, the sitemap, llms.txt and the web manifest. Free in your browser: the security headers (CSP, HSTS, frame, nosniff, referrer, permissions, fingerprints), robots.txt read the way crawlers read it, the AI-crawler policy for the kind of site, the sitemap, llms.txt, JSON-LD, title and description lengths, the canonical, hreflang, Open Graph and Twitter cards, favicons and the manifest - plus robots.txt, the security headers for Vercel, Cloudflare Pages, Netlify or nginx, and manifest.json, written for you. A metered run writes the launch report by phase - blockers, fixes, checks to do by hand, the order - or the files that need words: llms.txt, titles and descriptions at the right length, the social card text and the JSON-LD. Built on the SkillSafe skill @samber/site-launch-checklist, from samber/cc-skills (MIT), by Samuel Berthe.