Advent of Code 2025: Modern C++ and Zed

At a client I currently work for, we started a small code club a few months ago. The idea was simple: regularly try something outside our day-to-day stack. I began doing the challenges with Erlang, then moved to Elixir. For December, instead of making up a new monthly challenge, we decided to just do Advent of Code. It fits well: small problems, no long-term commitment, and plenty of room to…