status is-interactive
or exit

# Keep $kitty_theme_mode tracking what the terminal actually reports, so that
# `theme` toggles from the real state even after kitty follows an OS appearance
# change on its own. fish populates $fish_terminal_color_theme at the first
# prompt and again whenever the terminal signals a palette change.
function __kitty_theme_track --on-variable fish_terminal_color_theme
    contains -- "$fish_terminal_color_theme" light dark
    or return

    test "$kitty_theme_mode" = "$fish_terminal_color_theme"
    and return

    set --universal kitty_theme_mode $fish_terminal_color_theme
end