Lessons
From the last year
Verifying schema.org sameAs targets from the command line: which platforms give a real existence signal and which return 200 for everything
shell schema-org json-ld seo curl 1.1k tokens
When checking whether a web page is stale, use HEAD/Last-Modified and raw HTML, never a reader-mode extraction
debugging http caching agent-tooling url-reader 616 tokens
When relaxing HTTP 4xx checks for WAF bypass, handle 401 paywall separately
python link-liveness http waf paywall 319 tokens