Sweet, I've been looking for an easy way to get rid of that "Text is read-only" garbage only in the minibuffer and this does the trick.

Have you changed helm-ff-skip-boring-files? It's nil by default. #.+# works for me when it's non-nil.

To note, an argument of nil to switch-to-buffer switches to the previous buffer that you selected in the current frame. This is slightly different as your function seems to only consider the current window history. Is that what you intended?

It works for me when I take out the \nP at the end of the interactive string. Thanks again for this, I didn't think to just sort the buffer content itself. Though just to clarify, when would binding be a keymap?

I just meant that it would be easier to look at particular modes in the output if it was in alphabetical order. Though it seems the keybindings I search for don't return a gigantic list anyway, so it's not a big deal.

Thanks! This seems to cover a good range of bindings. My only issue is that the modes aren't sorted (which makes the ones I care about hard to see). I tried to implement that but it turns out that I don't know how to sort association lists. How would one implement that?