Let's make a Hello World example with scala-cli.
Create a file hello_sharaf.sc and paste this code into it:

//> using scala "3.7.0"
//> using dep ba.sake::sharaf-undertow:0.10.0

import ba.sake.sharaf.*
import ba.sake.sharaf.undertow.UndertowSharafServer

val routes = Routes:
  case GET -> Path("hello", name) =>
    Response.withBody(s"Hello $name")

UndertowSharafServer("localhost", 8181, routes).start()

println(s"Server started at http://localhost:8181")

Then run it like this:

scala-cli hello_sharaf.sc

Go to http://localhost:8181/hello/Bob.
You will see a "Hello Bob" text response.

---

The most interesting part is the Routes definition.
Here we pattern match on (HttpMethod, Path).
The Path contains a Seq[String], which are the parts of the URL you can match on.