llm-docs-builder

https://github.com/mensfeld/llm-docs-builder

A comprehensive Ruby tool for building and optimizing documentation for Large Language Models. Features include: generating llms.txt files from documentation directories with automatic file prioritization, transforming individual markdown files by expanding relative links to absolute URLs, bulk transforming entire documentation trees with customizable exclusion patterns, comparing content sizes to measure context window savings, and serving LLM-optimized documentation. Provides both CLI and Ruby API with configuration file support.