While the official 1v1.LOL code is closed-source, GitHub hosts several projects attempting to replicate the mechanics.
Some repositories host custom private server emulators or legacy versions of the game for educational and archival purposes. How to Use 1v1.lol GitHub Repositories 1v1.lol git hub
If you’re just trying to get better at 1v1.LOL, skip the GitHub shortcuts—hit the practice range instead. While the official 1v1