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agent-skills/skills/ai-crawler-accessibility-audit/SKILL.md
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MalinandClaude Sonnet 5 ae61c7ce7b skills: add SEO/AEO audit and grounded-JSON-LD skills from citeworthyio/seo-agent
Evaluated citeworthyio/seo-agent for reusable process knowledge. Relevant
to this fleet's WordPress content sites (granja travel news, content-agent
pipeline): a crawl-diagnose-approve-recrawl-measure loop for SEO metadata
changes, a three-layer AI-crawler accessibility audit (robots policy, bot
delivery, readable content), and a fail-closed method for generating and
safely injecting Article JSON-LD. Keyword research and citation-probe
pieces of the source repo were skipped as underdeveloped or too
infra-coupled to be reusable here.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-08-11 13:28:29 +02:00

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---
name: ai-crawler-accessibility-audit
description: Use when auditing whether a site can be crawled, read, and cited by AI answer engines, especially for JavaScript-rendered sites, CDN bot controls, robots.txt policy, llms.txt, or unexplained absence from AI citations.
license: MIT
source: adapted from https://github.com/citeworthyio/seo-agent/blob/b78bb487f2819c3c7cc2ba6f3f5626ea0b841840/src/aeo.ts
---
# AI Crawler Accessibility Audit
Audit three separate layers: policy, fetch delivery, and readable content. A
healthy `<head>` does not make a client-rendered page citable because AI crawlers
and user-fetchers generally do not execute the site's JavaScript.
## 1. Separate answer-engine bots from training bots
Read the live `/robots.txt` and evaluate its actual groups using longest-match
robots rules; an exact user-agent group takes precedence over `*`, and `Allow`
wins equal-length ties.
Treat blocking answer/search fetchers as a discoverability defect. Check at
least OAI-SearchBot, ChatGPT-User, Claude-SearchBot, Claude-User, PerplexityBot,
Perplexity-User, Googlebot, Bingbot, Meta-WebIndexer, DuckAssistBot,
MistralAI-User, Amazonbot, and Applebot. Googlebot and Bingbot also feed AI
answer surfaces.
Treat training-only crawlers separately: GPTBot, ClaudeBot, CCBot,
Google-Extended, Applebot-Extended, meta-externalagent, and Bytespider. Allowing
or denying these is a content-policy choice; do not claim that blocking them
alone removes the site from citations. Explicit groups are preferable to an
accidental allow-all because they document intent and survive managed
`robots.txt` defaults.
## 2. Validate agent-facing text resources by content
Fetch `/llms.txt` and, if advertised, `/llms-full.txt`. A `404` is an honest
absence. A `200` containing an HTML application shell or `text/html` is a soft
404 and worse: an agent asked for a text map and received misleading content.
Serve a real plain-text/Markdown resource or a clean absence. Treat these files
as cheap insurance, not as a proven ranking lever.
## 3. Compare ordinary and AI-user-agent delivery
From successful content pages, rotate a small daily sample rather than checking
the same first URLs forever. Fetch each sampled URL once normally and once with
the relevant AI user agent.
- If the normal request is `200` but the AI request is `403`, `429`, or `451`,
investigate CDN/WAF/bot-management policy. The controlled user-agent
difference is stronger evidence than either status alone.
- If the AI response succeeds, strip scripts, styles, and markup and inspect the
visible body. Fewer than roughly 200 characters, without full content in
`Article.articleBody`, is a useful empty-shell tripwire; inspect borderline
pages rather than treating the number as a universal quality score.
- Record transient fetch errors as unknown/check errors. Do not turn a failed
measurement into a claim that the site is blocked or healthy.
## 4. Fix the serving layer, then verify it
Prefer server rendering or static rendering. If that is not viable, serve a
real, fetchable HTML or Markdown content lane from the same source data, with
correct content negotiation and `Vary` headers. `articleBody` can be a fallback,
but visible server-delivered content is stronger.
Re-run both the ordinary and AI-user-agent requests against the public URL.
Only suppress an empty-body finding when there is positive evidence that an
alternate readable twin is live for that exact path. A configured twin that
cannot actually be fetched must not hide a true failure.