Interpreting Ctrl+- as Ctrl+_ to tmux (so that bind C+_ works)?

[oschrenk]

My workflow is currently still depending on tmux (until ghostty has a way to list tabs and windows for scripting)

In tmux I rebound Ctrl+- (minus key) to create a vertical split

bind -n 'C-_' split-window -v -c "#{pane_current_path}"

Now, the C- notation is based on ASCII control codes, and technically maps to Ctrl+Shift+- but in Alacritty I can just send Ctrl+- and it gets interpreted as I want it. As does `'C-' binding.

But in Ghostty only the 'C-\' binding works but not the C-_` binding without also pressing shift.

I hope that makes any sense. I find it hard to describe.

[oschrenk]

For now I created a karabiner elements binding to solve the issue for me

{
    "description": "Ctrl+- to Ctrl+Shift+- for Ghostty",
    "manipulators": [
        {
            "from": {
                "key_code": "hyphen",
                "modifiers": {
                    "mandatory": ["left_control"],
                    "optional": ["any"]
                }
            },
            "to": [
                {
                    "key_code": "hyphen",
                    "modifiers": ["left_control", "shift"]
                }
            ],
            "type": "basic"
        }
    ]
}