Useful commands

A smarter kill-line.

This kill-line command will kill backward if nothing can be killed forward. So you can press C-k twice to kill the part inside the pairs.

(defun my-kill-line ()
  "Kill a line forward while keeping expressions balanced.
If nothing can be deleted, kill backward."
  (interactive)
  (let ((forward-line (lambda ()
                        (if (eolp) (forward-char) (end-of-line))))
        (backward-line (lambda ()
                         (if (bolp) (forward-char -1) (beginning-of-line)))))
    (and
     (or (puni-soft-delete-by-move forward-line 'strict-sexp 'beyond 'kill)
         (puni-soft-delete-by-move backward-line 'strict-sexp 'beyond 'kill))
     ;; Reindent this line.
     (when (not (puni--line-empty-p))
       (save-excursion (indent-according-to-mode))))))