Recreate and Redraw Prompt on resize

Platform: Arch linux
Terminal software: Ghostty

def prompt [] {
	print 'test'
	let w = term size | get columns
	let bar = seq 1 ($w) | each {'-'} | str join
	$"($bar)\n"
}

$env.PROMPT_COMMAND = {|| prompt}

I am using this script to simplify testing.
in my real prompt (configured with starship) I have a 'fill' section which fills all the mid space.

my understanding is that on resize the closure assigned will not rerun to calculate the new width of the bar, instead the first prompt is cached and only redrawn on the terminal.

is there a way to rerun the closure instead to have the fill section shrink on resize.

Reproduce the resize behavior with the supplied prompt closure on Arch Linux and Ghostty, then inspect Reedline's prompt rendering and terminal-resize handling. Done means the prompt closure reruns after resizing so the bar or Starship fill section reflects the new terminal width, with no stale cached prompt remaining.