- saving with IndexNow on generates a 32-hex key (crypto/rand);
indexnow_new_key generates a new one, so the old key file answers 404
- GET /_sitemap/indexnow/{file} serves <key>.txt as text/plain while
IndexNow is on; the SEO layer maps it to the site root
- after each rebuild in production the added, changed and removed
addresses on the site host are queued as golem15.sitemap.indexnow jobs
(at most 10 000 per request, five attempts)
- the job posts {host, key, urlList} to api.indexnow.org through a
fetchguard client limited to that host and records the answer; 429 and
5xx retry, 400, 403 and 422 do not
- the IndexNow tab shows the S2 status partial: key or no key, last
notification or never, and the 403, 422 and 429 callouts
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