$ ruff --select E501 --ignore ALL scripts
scripts/add_rule.py:44:89: E501 Line too long (92 > 88 characters)
$ ruff --select E501 --extend-ignore ALL scripts
# (nothing)

I would expect --extend-select and --extend-ignore to simply append the values to the --select and --ignore values however they in fact take precedence over the former.

I find the current behavior to be unintuitive, is it intentional?