How can I make a reproduction of a bug for OkHttp?

I need to reproduce a bug with OkHttp so I can file a bug or ask a question on Stack Overflow.

What is the simplest way to do this without a lot of setup?

Make a Kotlin script in Intellij, place it outside any source folders and make sure it ends with .main.kts filename.

example.main.kts

#!/usr/bin/env kotlin

@file:Repository("https://repo1.maven.org/maven2/")
@file:DependsOn("com.squareup.okhttp3:okhttp:4.9.0")
@file:CompilerOptions("-jvm-target", "1.8")

import okhttp3.OkHttpClient
import okhttp3.Request

val client = OkHttpClient()

val request = Request.Builder()
  .url("https://raw.github.com/square/okhttp/master/README.md")
  .build()

val body = client.newCall(request).execute().use {
  it.body!!.string()
}

println(body)

The #! line means it will run like a shell script also

$ ./example.main.kts          
OkHttp
======

See the [project website][okhttp] for documentation and APIs.
...