Executable Documentation: When Your Comments Become Tests
rust
dev.to
TL;DR: Synoema stores documentation as executable state in the AST. Doc comments (---) and their example: assertions are parsed, tested, and rendered from a single source of truth. Stale docs fail the test suite. 56% fewer tokens than Python equivalent. Who this is for. If you've ever found an outdated docstring that claimed a function returned a string when it actually returns a list, this article is for you. Whether you maintain a library, write code with AI assistants, or just want doc