---
title: Llms Txt Builder
category: product
entity_type: skill
price: $15
canonical: https://forgehouse.ai/skills/llms-txt-builder/
lang: en
hreflang_alt: https://forgehouse.ai/tr/skiller/llms-txt-builder/
last_updated: 2026-06-20
---

# Llms Txt Builder

> Build and maintain `/llms.txt` + `/llms-full.txt` discovery files (Jeremy Howard 2024 proposed…

Builds and maintains the /llms.txt and /llms-full.txt discovery files that let AI crawlers like GPTBot, ClaudeBot, and PerplexityBot find your content hierarchy without parsing HTML. It generates both files from a single CMS or MDX source at build time, wires up cache purge on content change, and runs conformance checks so your site stays AI-discoverable.

## Use cases
- Making a large multilingual site discoverable to AI crawlers
- Increasing AI citation odds for ChatGPT, Perplexity, and AI Overviews
- Signaling content priority with grouped sections and an Optional tier
- Rapidly exposing new content to AI bots after a deploy
- Resolving 'ChatGPT isn't reading or citing us' complaints
- Keeping llms.txt in sync with sitemap.xml via drift detection

## Benefits
- Get AI engines to see new content in hours instead of weeks
- Steer crawl budget toward your highest-value pages first
- Prevent admin and staging URL leaks with a built-in validator
- Keep AI discovery files in sync automatically on every content change

## What’s included
- Build-time generators for Astro and Next.js from a CMS or MDX source
- llms.txt index and llms-full.txt full-content file output
- Content-change cache purge pipeline with CDN invalidation
- Conformance validator catching leaks, bad links, and size limits
- Drift detection comparing entry counts against sitemap.xml
- A four-layer AI discovery setup spanning robots.txt and link tags

## Who it’s for
SEO engineers and developers who want their content reliably discovered and cited by AI search engines.

## How it runs
The skill generates /llms.txt (short index, 500KB cap) and /llms-full.txt (full content, 5MB cap) from one canonical CMS source at build time, then wires the validation and cache purge chain around them. It is positioned honestly: a cheap side benefit for Perplexity and agent tools, never sold as a Google ranking lever.
1. Fetches the content inventory from the single source (a Sanity query or MDX files) grouped by priority: primary pages first, then pillar guides, recent blog posts, and a low-priority Optional section.
2. Builds llms.txt to spec: one H1 site name, a blockquote description, H2 sections ordered by priority (the order itself is the signal AI bots read), and link lines with descriptions capped at 100 characters.
3. Builds llms-full.txt with each page's full markdown body inline, so an AI agent reads everything in one request without HTML parsing or JS hydration.
4. Runs the conformance validator: exactly one H1, absolute https URLs only, zero admin/staging/preview/PII leaks, size limits enforced; any error exits the build with a nonzero code.
5. Wires the freshness chain: a CMS webhook triggers a rebuild or ISR revalidate, then purges the CDN cache, so both files update within about 60 seconds of a content change.
6. Adds drift detection: a cron compares the llms.txt entry count against sitemap.xml URLs, and a delta above 10 percent triggers a rebuild.

## FAQ
### My site is not on Astro or Next.js. Can I still use this?
The build-time generators target Astro 5 and Next.js 15 with a Sanity or MDX single source. On another stack you can borrow the file structure, the conformance validator logic, and the sync discipline, but you would wire the generation step into your own build yourself.

### Why not just write llms.txt by hand once?
Because it goes stale the moment content changes. The pipeline regenerates both llms.txt and llms-full.txt from your CMS or MDX source at build time, purges the CDN cache on content change, and runs drift detection against sitemap.xml so the file never silently falls behind your site.

### Will this guarantee that ChatGPT or Perplexity cites my site?
No. llms.txt is a proposed standard (llmstxt.org) and crawler adoption varies. What it does is remove the discovery barrier: GPTBot, ClaudeBot, and PerplexityBot get a clean content hierarchy instead of HTML soup. Whether you get cited still depends on the engine and your content.

## Price
$15, one-time, no subscription. VAT included.

Related guide: [How to automate SEO and AEO with Claude](https://forgehouse.ai/guides/automate-seo-claude/)