# `|`: visible tag prompt, native async shell filter, and one-step undo.
file pipe.txt alpha beta\ngamma delta
start 13 180 pipe.txt
wait 8000 alpha beta
stable 700 20000
key x |
text tr a-z A-Z
stable 300 5000
snap prompt
key enter
wait 8000 ALPHA BETA
stable 500 8000
snap filtered
key u
stable 400 5000
snap undone