[zaep]

I'm working on an MIT-licensed time-tracking tool in my spare time and I'm hoping somebody (in a "this is not legal advice"-capacity at least) can enlighten me on licensing here:

If I am understanding the AGPL-3.0 correctly (and assuming that the format is also under the license), I could NOT add an "export to Markwhen" feature to my project without then being forced to convert it to AGPL-3.0. Is this correct?

[ChadNauseam]

No, nobody can copyright a file format

[ethanwillis]

This, similarly you could copy(reimplement) the entire API for this software if you wish with some caveats.

[koch]

In addition to what others have said, I personally would love to see people using the format, so please go ahead!

I'd be interested to see what you're working on!