Don't hesitate to stick to enhancing the low-level non opinionated api. Having one is great because that enables all users to do what they want. Then you can h

Don't hesitate to stick to enhancing the low-level non opinionated api. Having one is great because that enables all users to do what they want. Then you can have other apis on top of it for opinionated usage like a kv store or other stuff. For representing a nested key the first implementation that springs in mind is to use the indent (number of empty colums on the left) as indicator of parent-child relationship.