Looks like it's going to be #TOML. Definitely not a bad choice. Will probably be taking a fair bit of inspiration from Rust's cargo files (or whatever they're called I don't use Rust). All that design can come later though. For now, the project file's contents are going to be completely ignored. I'll just be using it as a reference for the #compiler wrapper program to find the project root and process the whole project tree.
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