DocuWriter.ai is a code documentation tool that uses AI to generate comprehensive documentation from source code files with one click. It supports all major programming languages and exports documentation in Markdown format. The tool comes in two pricing plans, professional and agency, and offers features like automatic documentation generation, multi-language support, unlimited history generations, and a trial period of five days. The documentation provides an overview of the Tailwind CSS framework and allows users to customize and extend the default theme configurations, styling options, colors, and plugins. The tool aims to enhance collaboration, maintainability, and software quality with its time-saving documentation solution.