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You’d be surprised how many file formats are some flavor of “zip file containing files”.

JAR/WAR, iOS apps, and others

And SQLite: https://sqlite.org/appfileformat.html

In fact, relevantly to this article: https://sqlite.org/affcase1.html

I think it’s a decent hack.

Zip is a known format, so library support is mature. It can contain a local file system. And no one is going to casually muck about in it, so you can trust the structure.

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