Here's a very clear message to developers.

If you want to build a product that includes outlining, or include outlining in a product you already have, I'd like to work with you, and at the very least I'd like our software to interoperate so there's no user lock-in.

That's why Concord is GPL-licensed. I have good reasons for doing it this way. And I explain them in this 11-minute podcast.

Thanks!