> Windows get repositioned by normal interactions and the window manager is not able to wrangle them
I'm certainly biased, but no, I don't face issues like that
> and connecting external monitors is a disaster
Connecting and disconnecting external monitors is an important use case for me as well. I dedicated my time to support specifically this case, so hopefully it works correctly for other users as well
Based on the documentation the toml syntax is stretched quite a bit to implement some logic and callbacks. Have you considered some scripting language to make it easier to do, or is the need for this kind of advanced use so little that it's not really a problem?
The complexity of the config has grown since then, with the bigest (and, actually, the only) problem being on-window-detected callback as you mentioned.
I've been thinking about using a scripting language like Lua, but I haven't made my mind yet whether it's worth it