Yes it's a CLI REPL, you build and run the binary using the instructions in the README and then create/insert/select from it by typing those commands into the CLI.

Currently there's no way to connect to it like you would a normal SQL db, but you could embed it like you would sqlite.

Hopefully there is a help/man

You're a "dev," but don't seek out test folders/files for use case examples?

Don't let your employer know...

It's up to you (developer of repo in question) to make it low friction if you care about mass adoption, that's why Adafruit/Arduino libraries are used for random hardware ease of use/good documentation

They can be a dev and not want to have to clone and explore the code. There's tons of little bits of friction that're not addressed by the "face" of the repo. E.g. The readme doesn't seem to imply how to connect to this database (the answer is you write to its stdin, it's not socket based).

We're not at work here. Low effort posts are allowed though not encouraged. Implying that making a low effort post somehow makes you not a developer ("you're a 'dev' but don't seem out tests?") is it's own low effort post, while also being hurtful.

Please, let's keep things kind, focused, and clear.

If you're not a developer then you're not the target audience for this.