Fix sitemap social preview images#172
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Add the existing Punk Rock AI fallback only where Open Graph images were missing, and mirror every sitemap page image for Twitter. Extend index hygiene with canonical-site URL enforcement and focused regression tests.
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Summary
og:imagetwitter:imagemetadata across all 45 sitemap pages while preserving all 17 existing page-specific Open Graph valuesWhy
The production crawl found all 45 sitemap URLs indexable, but 28 pages had no social-preview image. Because this is a static site with page-owned
<head>markup, the smallest coherent fix touches each sitemap HTML page directly.The checker treats
punkrockai.comandwww.punkrockai.comas the same canonical site host family so the existing page-specific values remain byte-for-byte unchanged. Relative URLs, non-canonical protocols or ports, foreign hosts, missing tags, and mismatched Twitter images fail.Acceptance Self-Check
og:imageog:imagevalues are preservedhttps://www.punkrockai.com/public/slides/neither-are-we.webpfallback is added only to the 28 prior gapstwitter:imagevalues match their Open Graph image200 image/webpin local HTTP smokeVerification
npm run seo:index-hygienenpm run check200 text/html; all 13 unique referenced images returned200 image/*200 image/webp, 75,474 bytesgit diff --checkScope
The diff is 48 files and 285 insertions / 1 deletion: 45 static sitemap HTML files plus the existing checker, one focused test file, and the package test script. The issue explicitly requires full sitemap coverage. No deployment or Search Console, GA4, or DNS changes were performed.
Closes #171