he/him 
I haven't posted anything about Rome in a while so here is what I worked on this evening. These are more error messages. It's obviously not all I'm working on but it's the easiest thing to tweet and discuss.
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I have developed a vendetta against poor error messages. I have discovered that validating input like: function isValid(input: string): boolean; Is almost always bad. function getInvalidRange(input: string): undefined | [number, number]; Is way better.
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What does that actually mean? Actually pointing to the specific range and location of invalid input rather than "there is an error in here somewhere".
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Rome ingests package.json files and performs some normalization and validation. One of the fields is name. When you use a package.json name in npm or yarn that is invalid, it will just yell at you. Rome points to the exact location with some possible hints. Examples:
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These errors aren't generated until after either. The validation logic actually does some rough "autofixing". It would be possible to have a flag that suppresses the errors and writes the normalized fixed version to disk. Super nuanced and hard UX though to implement.
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End of conversation
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