he/him 
NPM should understand package.jsonc files (JSON with // and /* */ comment syntax).
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JSON parser tracks the current properties being parsed, when it encounters comments it assigns them to a map with the current key path. It's just a single map of object paths to comments. Then have a type-safe interface to consume the JSON, which has a `stringify` method.
It looks like this: https://gist.github.com/kittens/b81a865d4f91651ce9127ea85c524e97 … You can also just use the parse() method and do your own manual refinements if you want.
