`erd` https://github.com/BurntSushi/erd is a Haskell package that creates pretty diagrams from simple textual descriptions. It's made by @BurntSushi (https://github.com/BurntSushi), author of `ripgrep` and several Rust tools and packages. He's looking for help maintaining this older project of his, which many people still find very useful.

From my judgement, the code is fairly beginner friendly, so if you are new-intermediate in Haskell, understand the concepts involved in the package, and want to get into package maintainership, this might be a good start.

Details on https://github.com/BurntSushi/erd/issues/42