If you like learning-free planning, this is the really good stuff: many robots negotiating their paths via local communication and Gaussian Belief Propagation. Watch out for ambulances! Try it online at: https://aalok.uk/dancers/demo/ or get the super-fast C++ code.
DANCeRS @AalokPat https://x.com/AjdDavison/status/2074163258034970997/video/1