How too add submodes like in helix?

[sanfilippopablo]

In helix I have

[keys.insert.j]
k = "normal_mode" # Maps `jk` to exit insert mode

Any hint to how I can do the same here?

[crabdancing]

I am wondering the same thing. I have some tweaks in Helix for rebinding c in normal mode to comment selected lines. Here, I cannot figure out how to do that. :/