LangChain Docs: what its llms.txt contains

The file

LangChain Docs publishes an llms.txt at https://docs.langchain.com/llms.txt.

The file declares itself as Docs by LangChain in its H1, and the host is categorised here as ai & ml. It was last fetched and parsed on 2026-08-03.

Measured structure

Measure	LangChain Docs	Corpus median	Percentile
Size	97.6 KB	14.0 KB	88th
H2 sections	1	7	9th
Links	957	76	93th
Blockquote summary	Present	90 of 113 have one	n/a

Percentiles are against the 113 files in this directory, not against the web. That population is deliberately weighted toward documentation platforms and developer tools, which is where the convention started, so treat it as a peer group rather than a norm.

Observations

• 957 links is closer to a sitemap than to a curated index. The convention exists so a model can skip crawling everything; a list this long hands the selection problem straight back to it.

Comparable files

Closest in size within ai & ml, from the same weekly check:

• W&B Docs: 98.1 KB, 2 sections, 896 links , no blockquote summary
• Pinecone Docs: 75.7 KB, 2 sections, 419 links
• Groq Console: 61.8 KB, 0 sections, 150 links , no blockquote summary
• Anthropic Docs: 55.6 KB, 3 sections, 549 links , no blockquote summary

How this was measured

Our checker fetches /llms.txt for every host in the directory, follows redirects, confirms the response is Markdown rather than an HTML error page, and parses it with the same parser that powers our validator. Sizes are of the served body, sections are H2 headings, and links are Markdown links anywhere in the file. The run behind this page completed on 2026-08-03.

Want to check a file yourself, including this one? Paste the URL into the validator. To see how to find any site's file, see how to find a website's llms.txt, and for the full list see the directory of 113 verified files.