Hercule is a Node‑based command‑line tool and library that lets you embed (“transclude”) the contents of other Markdown, API Blueprint, or plain‑text files directly into a document using a simple `:[title](file)` syntax (or several alternative syntaxes). It’s aimed at developers, technical writers, and anyone who works with large, reusable Markdown‑style documentation and wants to keep source files DRY, modular, and easy to compose.