Awhile back I wanted sqlite for JSON, some simple file-based JSON document store with a basic query interface. TinyDB looks promising. It’s a Python library. It lets you stuff a bunch of JSON documents into a file database and then query them. The query language is pretty simple, mostly “documents that have property X”, but that’s fine. The underlying file format looks like one giant JSON blob and may not be very efficient for updates, not sure.
I’ve used the JSON1 support in sqlite now. It’s pretty good.
I sure wish it were easy to marry jq to some simple JSON document store.