llms.txt reduces Claude Code 404s on docs

The author examines whether the llms.txt file format effectively helps websites secure AI citations or guides coding agents to documentation. While studies indicate the file does not improve visibility in AI answers or search engines, public benchmark data shows a linked llms.txt significantly reduces 404 errors for coding agents like Claude Code. Consequently, the author concludes that adding the lightweight Markdown index to developer documentation is worthwhile if generated automatically, but advises against using it as an SEO strategy for marketing sites. Open article →