Hi, I'm trying to get a modified keypress from WezTerm → tmux → shell/application to work correctly, and I'm having trouble figuring out how tmux expects the sequence to be bound.

Setup

• OS: Linux 7.1.6-arch1-1
• Terminal: WezTerm
• tmux: 3.7b
• Shell: zsh

The key I'm trying to handle produces this sequence:
(obtained via running showkey -a in tmux)

^[[ 8 ; 5 u

or, in hex:

1b 5b 31 33 3b 35 75

What I'm trying to do

I want tmux to recognize this key sequence and turn it into:

C-w

I tried

bind-key -n "^[[8;5u" send-keys C-w

but that does not work

I'd appreciate any pointers or examples of the correct tmux configuration. Thanks!