[Keysh]

> * I'd like to move the cursor backwards and forwards in long commands easier, maybe even with the mouse (!). Use case is, say, a long curl command and I press up-arrow to repeat it, but want to tweak something. So I press and hold left arrow and wait.

Ctrl-A moves you to the beginning of the line (and Ctrl-E to the end of the line); Option-left-arrow moves you left by word, option-right-arrow right by word.