Mirakel doesn't work with Taskwarrior, and they stopped supporting it a while ago. There is a much better alternative.

Hm. Mirakel 3.0 apparently doesn’t work, but 2.8.2 is still on F-Droid. Compared to the "Taskwarrior" app there, it seems much more polished, with the Taskwarrior app, I have a hard time figuring out how to e.g. add subtasks to a problem (or even hide existing subtasks from cluttering everything). Do you have an even better alternative?

"Not using a database" is possibly our best feature. :)

I've heard that before. It's a good suggestion, thank you for reminding me. I'll roll that out soon.

Lua. Checkout the source code - it's gorgeous.