And I did it! I think the bug appeared when the HL aniversary update came out. Either way, I ended up doing a pull request (github.com/APGRoboCop/r...) so hopefully that won't be a problem for other people in future builds of RCBot.

Here's a video of me playing with the bots

Then how to port it? There are map decompilers but they usually create a lot of noise and sometimes even fail. Because of the simple geometry I wanted to do it manually by hand.

To help with this I created a Quake 1 mod that would allow me to do measurements of the map directly in-game.