seo-sitemaps (M17)
Sitemaps are the discovery contract you hand the crawler — they should list exactly the canonical, indexable URLs and nothing else. Schema rules for related markup: references/schema-tier1.md.
Inputs
Work from the PageSnapshot named in your dispatch envelope: read parsed from <run_dir>/pages/<slug>.json plus <run_dir>/site/sitemaps.json (+ site/sitemap-urls.txt), <run_dir>/site/robots.json, and <run_dir>/crawl.json for orphan reconciliation and per-URL status; Grep pages/<slug>.html for verbatim evidence. Deterministic findings already emitted by audit.mjs are listed in <run_dir>/findings.deterministic.json — do not re-emit those ids; add model-judged findings only. If invoked directly with a URL/path and no snapshot exists, first run node "${CLAUDE_PLUGIN_ROOT}/scripts/snapshot.mjs" <target> --out "${CLAUDE_PLUGIN_DATA}/runs" and use the printed snapshot path.
Audits
Working from the PageSnapshot (parsed_rendered when render.used is not none, else parsed) plus site/sitemaps.json and site/robots.json:
- Presence & validity: locate XML sitemap(s) (
/sitemap.xml, robotsSitemap:lines, sitemap index); parse as well-formed XML against the sitemaps.org schema. - Size limits: each sitemap
<=50,000URLs and<=50MBuncompressed; if exceeded, expect a sitemap index splitting the set. - Extensions: where relevant, validate
image:,video:, andnews:namespace entries (correct namespace declared, required child elements present). - lastmod accuracy:
<lastmod>is valid ISO 8601 and reflects real last-modified time — not a build-time stamp on every URL (which trains crawlers to ignore it). - robots referencing: at least one absolute
Sitemap:line inrobots.txt. - Sitemap-to-canonical consistency: no URL in the sitemap is
noindex, redirected, 4xx/5xx, or non-canonical (self-referencing canonical only). Cross-check indexability with M-indexability. - Orphan reconciliation: diff sitemap URLs against the internal link graph — flag indexable pages absent from the sitemap and sitemap URLs unreachable by internal links.
Fixes
- AUTO: generate or repair XML sitemap entries (correct
<loc>, accurate<lastmod>from observed last-modified data, validimage:/video:extension children where media exists) and add an absoluteSitemap:line torobots.txt. These are additive/deterministic diffs forfix. - PROPOSED: removing or splitting entries (e.g. dropping non-canonical/noindex URLs, sharding into a sitemap index) — drafted, accepted per-item.
- ADVISORY: changing site-wide lastmod strategy or canonical decisions — described, never written by the tool.
- Never fabricate lastmod times, media URLs, or canonical targets — pull from observed data, ask the user, or leave a clearly-marked
TODOplaceholder per the schemafixablecontract.
Verification
- From the run (no network): read
<run_dir>/site/sitemaps.jsonand<run_dir>/site/robots.json— the crawl already walked the index, followed gzipped children and recorded the per-file errors. - Re-fetch:
node "${CLAUDE_PLUGIN_ROOT}/scripts/parse-robots-sitemap.mjs" --url <final_url> [--max-sitemaps 50] [--max-urls 100000] [--no-well-known]— methodxml_parse: parses robots.txt + every declared and probed sitemap, checks well-formedness, size caps, namespace/extension validity, and the canonical/noindex consistency assertion.--sitemap <sitemap url>targets one file and--file <robots.txt> [--path /x]parses an offline robots file. This script has no--snapshotmode: sitemaps are site-level artifacts, not page snapshots. - When the required data tier (live fetch of sitemap/robots, or the resolved link graph) is unavailable, status is
needs_api— never a falsepass.
Findings
Emit findings per schema/finding.schema.json. Examples:
M17.sitemap.missing— no XML sitemap found at/sitemap.xmlor in robots.txt (statusfail, severity 3,fixable: auto, axissearch, confidenceestablished).M17.robots.no_sitemap_line— sitemap exists but noSitemap:line in robots.txt (statuswarn, severity 3,fixable: auto, axissearch, confidenceestablished).M17.sitemap.noindex_url— a<loc>in the sitemap points to anoindex/non-canonical URL (statusfail, severity 3,fixable: proposed, axissearch, confidenceestablished).M17.sitemap.error_url— a<loc>the crawl fetched returned 4xx/5xx (statusfail, severity 3,fixable: proposed, axissearch, confidenceestablished).M17.sitemap.redirected_url— a<loc>redirects instead of returning the final URL (statuswarn, severity 3,fixable: proposed, axissearch, confidenceestablished).M17.sitemap.missing_indexable_url— an indexable URL the crawl found is listed in no sitemap (statuswarn, severity 3,fixable: proposed, axissearch, confidencedirectional— a well-linked page is discovered without a sitemap).M17.sitemap.lastmod_identical— every<loc>carries the same<lastmod>, so the file cannot distinguish a changed page from an unchanged one (statuswarn, severity 2,fixable: advisory, axissearch, confidencedirectional). Per-URL verdicts are only emitted for<loc>entries the crawl actually fetched; a URL that was never visited is left unreported rather than guessed.M17.sitemap.missingis also emitted asneeds_apiwhen sitemap discovery never ran in the run (--artifacts none/--no-sitemaps), which is a different fact from "no sitemap exists". Platform-conditional ids. This module also emits 8 ids that fire only whenprofile.jsonnames the platform (shopify,wordpress,nextjs,nuxt,astro,gatsby,hugo). They are indexed inreferences/routing.md§ Platform-conditional finding ids and specified inreferences/platforms/<id>.md§10.
Each finding: evidence.observed quotes the page/sitemap verbatim; verification.reproduce is the runnable command above; expected_impact is banded + confidence-tagged (no naked %).
Honesty
- A sitemap is a discovery aid, not a ranking signal or an indexing guarantee — Google treats
<lastmod>,<priority>, and<changefreq>as hints, and<priority>/<changefreq>are largely ignored, so don't promise ranking lift from tuning them (label any such tactic low-magnitude/directional). - Submitting a sitemap won't force indexing of low-quality or non-canonical pages; orphan and canonical hygiene matters more than sitemap size.