The author of the text suggests that most open-source documentation is user-facing, but lacks documentation on how to contribute to projects. They highlight Sander Verweij's dependency-cruiser project, which visualizes and validates dependencies in a project, making it easier for contributors to navigate large codebases. The author provides examples of using dependency-cruiser with the reactive-react and preact projects, showcasing its ability to visualize top-level files, detect circular dependencies, and create a map-like visualization of a project's structure. They also discuss how this technology can be integrated into documentation systems like docusaurus to provide continuous updates and links to relevant code files. The author concludes that visual internal documentation is an important aspect of promoting better open-source projects and invites readers to explore its possibilities.