SEO: Emit <lastmod> in sitemap#2859
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The generated sitemap.xml had no <lastmod> timestamps (only changefreq and priority), so search engines had no signal that a page's content changed. This hurts pages whose body is fully replaced each release under a stable URL — most notably /calico/latest/release-notes/ — leaving stale snapshots in the index. Enable the sitemap plugin's `lastmod: 'date'` option (supported since Docusaurus 3.4; project is on 3.10) so each URL gets a <lastmod> date derived from git. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Pull request overview
This PR improves SEO for the Docusaurus-generated sitemap.xml by enabling <lastmod> output so search engines can better detect when stable URLs (notably release notes pages) change between releases.
Changes:
- Enable sitemap
<lastmod>emission usinglastmod: 'date'in the Docusaurus sitemap configuration.
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Problem
The generated
sitemap.xmlcontains no<lastmod>timestamps — every entry is just:Without
<lastmod>, search engines have no signal that a page changed, so they recrawl lazily. This hits pages whose body is fully replaced each release under a stable URL hardest — above all/calico/latest/release-notes/, whose content swaps every minor release. In the field, Google's indexed copy of that page was stale by several releases (showing 3.28-era content while live was 3.32).Change
Enable the sitemap plugin's
lastmod: 'date'option:Each URL now gets a
<lastmod>date (derived from git history / file mtime).'date'emitsYYYY-MM-DD(day granularity, appropriate for docs).Notes
^3.10.1.🤖 Generated with Claude Code