I mapped <a-.>
in insert mode to inserting the last WORD of the previous line:
define-command -hidden -override insert-last-word-of-prev-line %{
execute-keys -draft 'Z;kgl<a-i><a-w>yzP'
}
map global insert <a-.> '<a-;>: insert-last-word-of-prev-line<ret>'
This is the same keybinding used in Bash (readline) to paste the last argument of the previous command. It’s useful when writing shell scripts.