<?xml version="1.0" encoding="UTF-8"?>
<!-- oligocalculator.com sitemap.
     Updated 2026-08-09 (R59) for the standalone root deployment.

     ONE entry, on purpose. The application is a single page: the MW Calculator,
     Concentration and Mass Spec tabs, the FAQ, the history drawer, the catalog
     and the Terms / Privacy / Refunds / Contact documents are all in-page views
     with no separate crawlable address. Listing them as URLs would advertise
     addresses that return the same document, which splits ranking signals
     instead of concentrating them.

     The previous version listed /next/ as canonical and the root as secondary.
     That inverted once the standalone build became the only build. -->
<!-- R71 step 2a: the language landing pages.  Each is a DIFFERENT
     document in a different language, which is why each carries its
     own canonical and is listed here.  The in-page tab views are
     still deliberately absent: those are one document and the root
     canonical says so. -->
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <!-- R76c, review row R76b-2: ⚠ ONLY THIS ENTRY MOVED, and that is the whole
       decision. All four entries said 2026-08-13. The three landing pages
       really have not changed since then, so a blanket bump would have put a
       false date on three URLs in order to fix a true one.
       ⚠⚠ THIS DATE IS A GUESS WITH A CORRECTION STEP, not a measurement. It is
       R76c's build date, and the honest value is the day index.html actually
       goes up, which cannot be known while writing the file.
       docs/R76c-DEPLOY-STEPS.md step 5 tells Albert to change this one number
       if he uploads on a later day. -->
  <url>
    <loc>https://oligocalculator.com/</loc>
    <lastmod>2026-08-16</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
  </url>
  <url>
    <loc>https://oligocalculator.com/zh-Hant/</loc>
    <lastmod>2026-08-13</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://oligocalculator.com/zh-Hans/</loc>
    <lastmod>2026-08-13</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://oligocalculator.com/ja/</loc>
    <lastmod>2026-08-13</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
</urlset>
