• msys/fish, version 4.1.2-1 (Built by MSYS2 project)
• ucrt64/mingw-w64-ucrt-x86_64-wezterm 20240812-215703-30345b36 (installed with pacman in MSYS2)
• Windows 11 24H2 (OS internal version 26100.6899)

https://github.com/fish-shell/fish-shell/blob/4.1.2/share/functions/__fish_config_interactive.fish#L183

This line doesn't work, I need to configure c:/msys64/home/xxx/.config/fish/config.fish:

if status is-interactive
    function __fish_update_cwd_osc --description 'Notify terminals when $PWD changes' --on-variable PWD
        # use an empty string for path,  "e\]7\;file:// / \a"  and "e\]7\;file:// Pt / Pt\a"
        # also work (notice it's literal "Pt"), no idea why.
        printf \e\]7\;\a
    end
end

My WezTerm configuration at c:/Users/xxx/.wezterm.lua:

local wezterm = require 'wezterm'

local config = wezterm.config_builder()

config.default_prog = {
     'C:\\msys64\\msys2_shell.cmd',
    '-ucrt64',
    '-defterm',
    '-here',
    '-no-start',
    '-shell', 'fish'
}

config.default_cwd = 'C:\\msys64\\home\\xxx'

return config