Every #TypeScript library I maintain uses Twoslash. I still haven't regretted it, even when Fedify's docs take nearly ten minutes to build. That wait is annoying. I keep paying it.

For a TypeScript library, the type signature often does most of the explaining. I used to write sentences describing what a function returns. Now I'd rather let #Twoslash show the compiler's answer inline. That removes one common way my docs used to go stale.