> I'm missing clarity about how do I escape Instant DB when I need to, and how to make it part of a larger system.

Instant is completely open source. We have no private repos, so in the event that you want to run the system yourself, you can fork it.

> how to make it part of a larger system.

If you have an existing app, right now I would suggest storing the parts that you want to reactive on Instant.

We're working on a Postgres adapter. This would let you connect an existing database, and use Instant for the real-time sync. If you'd be interested in using this, reach out to us at founders@instantdb.com!