For routing, why did Ktor go with

"/mouse/{id}"

rather than

"/mouse/:id"

, which seems a little more common?

There are couple of reasons. One is that it looks a bit like string interpolation. Another is prefix/suffix, e.g.

foo-{id}-bar

, it’s easier to separate name of path-param from the rest of the text. One more is that we planned to support typed params, like

{id:Int}

or something, but didn’t really design and implement it (yet).

Ah, I didn’t think of the prefix/suffix thing. Thank you, that’s helpful. I’m implementing something similar for routing in https://kweb.io/, and didn’t want to reinvent the wheel unnecessarily.