{ "protocol": { "study_id": "LAB-SITEMAP-2026-10-12", "registered_at_utc": "2026-10-12T20:52:06.629280+00:00", "article_written": false, "question": "Which URL failed: the sitemap endpoint, its data source or a listed page? Do controlled cases differ between dev and local production?", "versions": { "next": "15.5.22", "react": "19.2.6", "react_dom": "19.2.6", "node": "v25.2.1" }, "environments": [ { "id": "dev", "origin": "http://127.0.0.1:8801" }, { "id": "production", "origin": "http://127.0.0.1:8802" } ], "cases": [ { "id": "S1", "name": "Static control", "variants": [ { "state": "control", "path": "/sitemap.xml" } ], "change": "None; valid baseline" }, { "id": "S2", "name": "Dynamic data source", "variants": [ { "state": "before", "path": "/dynamic-bad/sitemap.xml" }, { "state": "after", "path": "/dynamic-ok/sitemap.xml" } ], "change": "One source path: /missing-catalog.json to /catalog.json. Checked fetch explicitly throws for non-2xx responses; observe resulting sitemap status rather than assume 404." }, { "id": "S3", "name": "Wrong requested endpoint", "variants": [ { "state": "before", "path": "/sitemaps/catalog.xml" }, { "state": "after", "path": "/catalog/sitemap.xml" } ], "change": "Request the path corresponding to app/catalog/sitemap.js; no sitemap implementation change." }, { "id": "S4", "name": "Unpublished URL in XML", "variants": [ { "state": "before", "path": "/stale-before/sitemap.xml" }, { "state": "after", "path": "/stale-after/sitemap.xml" } ], "change": "Filter records by published before mapping; remove /products/retired, do not redirect or replace it with another product." } ], "rounds": 2, "planned_sitemap_requests": 28, "source_preflight_paths": [ "/catalog.json", "/missing-catalog.json" ], "source_origin": "http://127.0.0.1:8800", "collection": [ "Freeze source, lockfile and collector before measurements. Install fixture in an isolated temporary directory.", "Start controlled source, build once, start next dev and next start with separate build directories and documented local origins.", "Capture two source preflight responses separately.", "For every variant in both environments, record status, content type, complete body hash, XML parse result, root/namespace and loc entries. XML parsing is a structural check, not full XSD validation.", "Request every loc only when it has the exact measured localhost origin; cap at 2 URLs; save status and headers. Do not follow redirects automatically.", "Repeat the matrix once. Keep statuses and URL counts separate; compare paths across environments because origins deliberately differ.", "Manually inspect representative server output and browser-visible live/absent product paths. Preserve all errors rather than excluding them." ], "acceptance": [ "All 28 sitemap requests attempted and recorded, including intentionally failing endpoints.", "Each stated fix has after observations in both environments and rounds.", "Any dev/production differences retained and explained without attributing them to hosting not tested." ], "limits": [ "Artificially injected faults, not prevalence of real defects.", "Local production is not Vercel, another host, a CDN or a proxy.", "No reproduction of the Prisma/Windows/Next.js RC environment from GitHub issue 72808.", "No indexing, rankings, search-console ingestion, citation, traffic or conversion test.", "Feed is a controlled two-record local HTTP endpoint, not a live CMS or database.", "No cache invalidation, runtime credential, sharded generateSitemaps, middleware or rewrite experiments." ] }, "analysis": { "study_id": "LAB-SITEMAP-2026-10-12", "analyzed_at_utc": "2026-10-12T20:56:43.552041+00:00", "sitemap_responses": 28, "listed_page_responses": 36, "source_preflight_responses": 2, "collector_responses_total": 66, "environments": 2, "rounds": 2, "cases": 4, "variants": 7, "all_body_hashes_verified": true, "frozen_fixture_matches_runtime": true, "dev_production_path_status_signatures_match": true, "round_signatures_match": true, "matrix": [ { "case": "S1", "state": "control", "path": "/sitemap.xml", "observations": 4, "sitemap_status": 200, "urlset": true, "loc_count": 2, "listed": [ { "path": "/products/widget-a", "status": 200 }, { "path": "/products/widget-b", "status": 200 } ] }, { "case": "S2", "state": "before", "path": "/dynamic-bad/sitemap.xml", "observations": 4, "sitemap_status": 500, "urlset": false, "loc_count": null, "listed": [] }, { "case": "S2", "state": "after", "path": "/dynamic-ok/sitemap.xml", "observations": 4, "sitemap_status": 200, "urlset": true, "loc_count": 2, "listed": [ { "path": "/products/widget-a", "status": 200 }, { "path": "/products/widget-b", "status": 200 } ] }, { "case": "S3", "state": "before", "path": "/sitemaps/catalog.xml", "observations": 4, "sitemap_status": 404, "urlset": false, "loc_count": null, "listed": [] }, { "case": "S3", "state": "after", "path": "/catalog/sitemap.xml", "observations": 4, "sitemap_status": 200, "urlset": true, "loc_count": 2, "listed": [ { "path": "/products/widget-a", "status": 200 }, { "path": "/products/widget-b", "status": 200 } ] }, { "case": "S4", "state": "before", "path": "/stale-before/sitemap.xml", "observations": 4, "sitemap_status": 200, "urlset": true, "loc_count": 2, "listed": [ { "path": "/products/widget-a", "status": 200 }, { "path": "/products/retired", "status": 404 } ] }, { "case": "S4", "state": "after", "path": "/stale-after/sitemap.xml", "observations": 4, "sitemap_status": 200, "urlset": true, "loc_count": 1, "listed": [ { "path": "/products/widget-a", "status": 200 } ] } ], "limits": [ "Statuses describe deliberately injected faults on Next.js 15.5.22; not a frequency estimate.", "Source 404 led to sitemap 500 because the fixture explicitly throws for non-OK fetch responses.", "urlset checks parsing and the expected root namespace; not a full XSD validation.", "No local dev/production difference observed. Hosting, CDN, proxy and Vercel not tested.", "No indexing, ranking, AI citation or business outcome measured.", "Listed status 200 is an availability check, not a complete indexability assessment." ] }, "observations": { "study_id": "LAB-SITEMAP-2026-10-12", "source_preflight": [ { "id": "source-1", "url": "http://127.0.0.1:8800/catalog.json", "at_utc": "2026-10-12T20:53:36.205104+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "Server", "BaseHTTP/0.6 Python/3.9.6" ], [ "Date", "Mon, 12 Oct 2026 20:53:36 GMT" ], [ "Content-Type", "application/json" ], [ "Content-Length", "44" ] ], "content_type": "application/json", "body_file": "evidence/source-1.body", "body_sha256": "8478e604fda0e61d8303ffeb2e5d549a9f58cdc373b283463b33ddedbff43055", "body_bytes": 44 }, { "id": "source-2", "url": "http://127.0.0.1:8800/missing-catalog.json", "at_utc": "2026-10-12T20:53:36.212005+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 404, "headers": [ [ "Server", "BaseHTTP/0.6 Python/3.9.6" ], [ "Date", "Mon, 12 Oct 2026 20:53:36 GMT" ], [ "Content-Type", "application/json" ], [ "Content-Length", "49" ] ], "content_type": "application/json", "body_file": "evidence/source-2.body", "body_sha256": "f6145800fc6a42d3ed845746e0a776a8b652e9a34517103ded2c3f7640ade58c", "body_bytes": 49 } ], "sitemaps": [ { "id": "S1--control--dev--r1", "url": "http://127.0.0.1:8801/sitemap.xml", "at_utc": "2026-10-12T20:53:36.212708+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch" ], [ "cache-control", "public, max-age=0, must-revalidate" ], [ "content-type", "application/xml" ], [ "Date", "Mon, 12 Oct 2026 20:53:37 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "application/xml", "body_file": "evidence/S1--control--dev--r1.body", "body_sha256": "2a0471e7185e29d307bc84886a597ad7fc4a140c824ec2d263cc576aa9d9c8c0", "body_bytes": 238, "case": "S1", "state": "control", "environment": "dev", "round": 1, "xml_well_formed": true, "sitemap_urlset": true, "loc_count": 2, "locations": [ "http://127.0.0.1:8801/products/widget-a", "http://127.0.0.1:8801/products/widget-b" ], "listed_responses": [ { "id": "S1--control--dev--r1--loc-1", "url": "http://127.0.0.1:8801/products/widget-a", "at_utc": "2026-10-12T20:53:37.049032+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "Cache-Control", "no-store, must-revalidate" ], [ "x-nextjs-cache", "HIT" ], [ "x-nextjs-prerender", "1" ], [ "X-Powered-By", "Next.js" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Date", "Mon, 12 Oct 2026 20:53:37 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S1--control--dev--r1--loc-1.body", "body_sha256": "e2bd2ae9d3a3bac805c53758e7cd214ea69a982761f6db10c4d8a3b3cbd0995e", "body_bytes": 13502 }, { "id": "S1--control--dev--r1--loc-2", "url": "http://127.0.0.1:8801/products/widget-b", "at_utc": "2026-10-12T20:53:37.989252+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "Cache-Control", "no-store, must-revalidate" ], [ "x-nextjs-cache", "HIT" ], [ "x-nextjs-prerender", "1" ], [ "X-Powered-By", "Next.js" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Date", "Mon, 12 Oct 2026 20:53:38 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S1--control--dev--r1--loc-2.body", "body_sha256": "57e317df760acf537e29eadfdcc57ff03effd301eb11b97fae8b3547c623d80e", "body_bytes": 13503 } ], "xml_root": "{http://www.sitemaps.org/schemas/sitemap/0.9}urlset" }, { "id": "S2--before--dev--r1", "url": "http://127.0.0.1:8801/dynamic-bad/sitemap.xml", "at_utc": "2026-10-12T20:53:38.015755+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 500, "headers": [ [ "vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch" ], [ "Date", "Mon, 12 Oct 2026 20:53:38 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": null, "body_file": "evidence/S2--before--dev--r1.body", "body_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", "body_bytes": 0, "case": "S2", "state": "before", "environment": "dev", "round": 1, "xml_well_formed": false, "sitemap_urlset": false, "loc_count": null, "locations": [], "listed_responses": [], "xml_error": "no element found: line 1, column 0" }, { "id": "S2--after--dev--r1", "url": "http://127.0.0.1:8801/dynamic-ok/sitemap.xml", "at_utc": "2026-10-12T20:53:38.137197+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch" ], [ "cache-control", "public, max-age=0, must-revalidate" ], [ "content-type", "application/xml" ], [ "Date", "Mon, 12 Oct 2026 20:53:38 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "application/xml", "body_file": "evidence/S2--after--dev--r1.body", "body_sha256": "2a0471e7185e29d307bc84886a597ad7fc4a140c824ec2d263cc576aa9d9c8c0", "body_bytes": 238, "case": "S2", "state": "after", "environment": "dev", "round": 1, "xml_well_formed": true, "sitemap_urlset": true, "loc_count": 2, "locations": [ "http://127.0.0.1:8801/products/widget-a", "http://127.0.0.1:8801/products/widget-b" ], "listed_responses": [ { "id": "S2--after--dev--r1--loc-1", "url": "http://127.0.0.1:8801/products/widget-a", "at_utc": "2026-10-12T20:53:38.217900+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "Cache-Control", "no-store, must-revalidate" ], [ "x-nextjs-cache", "HIT" ], [ "x-nextjs-prerender", "1" ], [ "X-Powered-By", "Next.js" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Date", "Mon, 12 Oct 2026 20:53:38 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S2--after--dev--r1--loc-1.body", "body_sha256": "040dbf12e12b5c7b504496c7483ff2e7719e0eb9a5e1957a30e22f2ff0f841ae", "body_bytes": 13503 }, { "id": "S2--after--dev--r1--loc-2", "url": "http://127.0.0.1:8801/products/widget-b", "at_utc": "2026-10-12T20:53:38.266223+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "Cache-Control", "no-store, must-revalidate" ], [ "x-nextjs-cache", "HIT" ], [ "x-nextjs-prerender", "1" ], [ "X-Powered-By", "Next.js" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Date", "Mon, 12 Oct 2026 20:53:38 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S2--after--dev--r1--loc-2.body", "body_sha256": "42d3a8c7a6ae5cd9f5614f0c66910449d450e5209ff3937e9daf9b26eeed44a2", "body_bytes": 13503 } ], "xml_root": "{http://www.sitemaps.org/schemas/sitemap/0.9}urlset" }, { "id": "S3--before--dev--r1", "url": "http://127.0.0.1:8801/sitemaps/catalog.xml", "at_utc": "2026-10-12T20:53:38.294292+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 404, "headers": [ [ "Cache-Control", "no-store, must-revalidate" ], [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "X-Powered-By", "Next.js" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Date", "Mon, 12 Oct 2026 20:53:38 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S3--before--dev--r1.body", "body_sha256": "a15fd6b0dfa9d898e5cc9d5dd6f9860b84204b898db09fdb9ee5979331216906", "body_bytes": 12128, "case": "S3", "state": "before", "environment": "dev", "round": 1, "xml_well_formed": true, "sitemap_urlset": false, "loc_count": null, "locations": [], "listed_responses": [], "xml_root": "html" }, { "id": "S3--after--dev--r1", "url": "http://127.0.0.1:8801/catalog/sitemap.xml", "at_utc": "2026-10-12T20:53:38.413609+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch" ], [ "cache-control", "public, max-age=0, must-revalidate" ], [ "content-type", "application/xml" ], [ "Date", "Mon, 12 Oct 2026 20:53:38 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "application/xml", "body_file": "evidence/S3--after--dev--r1.body", "body_sha256": "2a0471e7185e29d307bc84886a597ad7fc4a140c824ec2d263cc576aa9d9c8c0", "body_bytes": 238, "case": "S3", "state": "after", "environment": "dev", "round": 1, "xml_well_formed": true, "sitemap_urlset": true, "loc_count": 2, "locations": [ "http://127.0.0.1:8801/products/widget-a", "http://127.0.0.1:8801/products/widget-b" ], "listed_responses": [ { "id": "S3--after--dev--r1--loc-1", "url": "http://127.0.0.1:8801/products/widget-a", "at_utc": "2026-10-12T20:53:38.490286+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "Cache-Control", "no-store, must-revalidate" ], [ "x-nextjs-cache", "HIT" ], [ "x-nextjs-prerender", "1" ], [ "X-Powered-By", "Next.js" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Date", "Mon, 12 Oct 2026 20:53:38 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S3--after--dev--r1--loc-1.body", "body_sha256": "aaee6931141ef37259185d3e7c8780a139444c6ac054ea70a8277e7e36255a17", "body_bytes": 13503 }, { "id": "S3--after--dev--r1--loc-2", "url": "http://127.0.0.1:8801/products/widget-b", "at_utc": "2026-10-12T20:53:38.536680+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "Cache-Control", "no-store, must-revalidate" ], [ "x-nextjs-cache", "HIT" ], [ "x-nextjs-prerender", "1" ], [ "X-Powered-By", "Next.js" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Date", "Mon, 12 Oct 2026 20:53:38 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "text/html; 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charset=utf-8" ], [ "Content-Length", "5763" ], [ "Date", "Mon, 12 Oct 2026 20:53:39 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S3--after--production--r2--loc-2.body", "body_sha256": "e614a696e4355fb2f1793227cdc42440d06a5e942bfdd55bbc39fca0eb73e7da", "body_bytes": 5763 } ], "xml_root": "{http://www.sitemaps.org/schemas/sitemap/0.9}urlset" }, { "id": "S4--before--production--r2", "url": "http://127.0.0.1:8802/stale-before/sitemap.xml", "at_utc": "2026-10-12T20:53:39.249862+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch" ], [ "x-nextjs-cache", "HIT" ], [ "cache-control", "public, max-age=0, must-revalidate" ], [ "content-type", "application/xml" ], [ "Date", "Mon, 12 Oct 2026 20:53:39 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "application/xml", "body_file": "evidence/S4--before--production--r2.body", "body_sha256": "ea63024c55f0b2ef37954ccf8dd62e45aaaf3e72ebae3f00a706ae63c2a6d83d", "body_bytes": 237, "case": "S4", "state": "before", "environment": "production", "round": 2, "xml_well_formed": true, "sitemap_urlset": true, "loc_count": 2, "locations": [ "http://127.0.0.1:8802/products/widget-a", "http://127.0.0.1:8802/products/retired" ], "listed_responses": [ { "id": "S4--before--production--r2--loc-1", "url": "http://127.0.0.1:8802/products/widget-a", "at_utc": "2026-10-12T20:53:39.251557+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "x-nextjs-cache", "HIT" ], [ "x-nextjs-prerender", "1" ], [ "x-nextjs-prerender", "1" ], [ "x-nextjs-stale-time", "300" ], [ "X-Powered-By", "Next.js" ], [ "Cache-Control", "s-maxage=31536000" ], [ "ETag", "\"2r38qew9gr4g3\"" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Content-Length", "5763" ], [ "Date", "Mon, 12 Oct 2026 20:53:39 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S4--before--production--r2--loc-1.body", "body_sha256": "510fa705d263662e6e6daf10516ba596eeacf167cb56f2385b806f3b0175288b", "body_bytes": 5763 }, { "id": "S4--before--production--r2--loc-2", "url": "http://127.0.0.1:8802/products/retired", "at_utc": "2026-10-12T20:53:39.252817+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 404, "headers": [ [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "Cache-Control", "private, no-cache, no-store, max-age=0, must-revalidate" ], [ "x-nextjs-cache", "HIT" ], [ "x-nextjs-prerender", "1" ], [ "x-nextjs-prerender", "1" ], [ "x-nextjs-stale-time", "300" ], [ "X-Powered-By", "Next.js" ], [ "ETag", "\"qq6zu1v0r44gc\"" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Content-Length", "5772" ], [ "Date", "Mon, 12 Oct 2026 20:53:39 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S4--before--production--r2--loc-2.body", "body_sha256": "8cb90c308b1e99f1584792bc2ddf6a22740c2893842cc5ed77b38b0bbcff7c33", "body_bytes": 5772 } ], "xml_root": "{http://www.sitemaps.org/schemas/sitemap/0.9}urlset" }, { "id": "S4--after--production--r2", "url": "http://127.0.0.1:8802/stale-after/sitemap.xml", "at_utc": "2026-10-12T20:53:39.256604+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch" ], [ "x-nextjs-cache", "HIT" ], [ "cache-control", "public, max-age=0, must-revalidate" ], [ "content-type", "application/xml" ], [ "Date", "Mon, 12 Oct 2026 20:53:39 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ], [ "Transfer-Encoding", "chunked" ] ], "content_type": "application/xml", "body_file": "evidence/S4--after--production--r2.body", "body_sha256": "2523c437940bc1d4244d8c43c002e43618ef2e8d2902bacf12068abc8b89e027", "body_bytes": 174, "case": "S4", "state": "after", "environment": "production", "round": 2, "xml_well_formed": true, "sitemap_urlset": true, "loc_count": 1, "locations": [ "http://127.0.0.1:8802/products/widget-a" ], "listed_responses": [ { "id": "S4--after--production--r2--loc-1", "url": "http://127.0.0.1:8802/products/widget-a", "at_utc": "2026-10-12T20:53:39.258446+00:00", "request_headers": { "User-Agent": "Neaptide-Sitemap-Lab/1.0", "Accept": "*/*", "Accept-Encoding": "identity" }, "status": 200, "headers": [ [ "Vary", "rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding" ], [ "x-nextjs-cache", "HIT" ], [ "x-nextjs-prerender", "1" ], [ "x-nextjs-prerender", "1" ], [ "x-nextjs-stale-time", "300" ], [ "X-Powered-By", "Next.js" ], [ "Cache-Control", "s-maxage=31536000" ], [ "ETag", "\"2r38qew9gr4g3\"" ], [ "Content-Type", "text/html; charset=utf-8" ], [ "Content-Length", "5763" ], [ "Date", "Mon, 12 Oct 2026 20:53:39 GMT" ], [ "Connection", "keep-alive" ], [ "Keep-Alive", "timeout=5" ] ], "content_type": "text/html; charset=utf-8", "body_file": "evidence/S4--after--production--r2--loc-1.body", "body_sha256": "510fa705d263662e6e6daf10516ba596eeacf167cb56f2385b806f3b0175288b", "body_bytes": 5763 } ], "xml_root": "{http://www.sitemaps.org/schemas/sitemap/0.9}urlset" } ] }, "sources": [ { "url": "https://nextjs.org/docs/app/api-reference/file-conventions/metadata/sitemap", "checked": "2026-10-12", "note": "File placement, route conventions and caching guidance; latest docs distinguished from pinned test version." }, { "url": "https://github.com/vercel/next.js/issues/72808", "checked": "2026-10-12", "note": "Closed report opened 2024-11-14. Environment shows Next 15.0.0-rc.0, React RC, Windows and Prisma. Motivation only; not reproduced or diagnosed by this fixture." } ], "supplementary-sources": [ { "url": "https://developers.google.com/search/docs/crawling-indexing/sitemaps/build-sitemap", "checked": "2026-10-12", "notes": [ "Absolute preferred URLs; submission does not guarantee crawling.", "Added after measurement; no protocol or data changes." ] } ], "browser-observations": { "scope": "Two production paths, supplemental visual check after collection", "observations": [ { "path": "/products/retired", "visible": "404: This page could not be found.", "screenshot": "browser-evidence/retired.png" }, { "path": "/products/widget-a", "visible": "Product widget-a; fictional product disclaimer.", "screenshot": "browser-evidence/live-product.png" } ] }, "reproduction-verification": { "verified_at_utc": "2026-10-12T20:57:42.422018+00:00", "archive_sha256": "743dd93628792fef9c88375154a165eaaaa0e43532ae8e08d2e7501104909af8", "frozen_source_files_match": 17, "replayed_sitemap_responses": 28, "replayed_listed_responses": 36, "replayed_source_preflight": 2, "matched_signatures": 28, "scope": "Collector from extracted archive against original running dev/production fixture. Primary fixture had a clean npm ci and build; replay did not independently reinstall/restart servers." } }