Where is the config file?

[klausbreyer]

I have just installed cmux and find it awesome. However I want to sync my cmux config (dont reorder workspaces, etc.) to my other computers (via chezmoi)
But I cannot find it.

Regarding the config files mentioned in the docs:
~/.config/ghostty/config. is not present on my system
~/Library/Application Support/com.mitchellh.ghostty/config.ghostty is empty.

[TheBeardNerd]

You have to create it:

mkdir -p ~/.config/ghostty
touch ~/.config/ghostty/config

[klausbreyer]

Thanks for your reply. I did this. However, it does not save there when I change something in the config. Like, don't reorder workspaces.

[Gecko51]

The ghostty config is only for terminal rendering (fonts, themes, colors). cmux app settings like workspace reorder behavior, shortcuts, sidebar, etc. live in a separate file:

~/.config/cmux/cmux.json

That file is auto-created with a commented template on first launch. If yours is missing, open cmux Settings, the "cmux.json" section has a button to open the canonical file in your editor.

For your "don't reorder workspaces" case, the key is app.reorderOnNotification:

{
  "$schema": "https://raw.githubusercontent.com/manaflow-ai/cmux/main/web/data/cmux.schema.json",
  "schemaVersion": 1,
  "app": {
    "reorderOnNotification": false
  }
}

After saving, hit Cmd+Shift+, or run cmux reload-config to pick it up without restarting.

For chezmoi, you'll want to track both files since they cover different things:

• ~/.config/cmux/cmux.json for app settings, shortcuts, workspace colors
• ~/.config/ghostty/config for terminal fonts and theme

One gotcha, the legacy ~/.config/cmux/settings.json and the Application Support file are still read but only as fallbacks for missing keys, so no point syncing those.

[klausbreyer]

Thanks! The file is there. But is is weird. Everything is commented out. Despite the fact that I changed stuff. For example, the reorder on notification.

[adong]

~/.config/ghostty/config worked, there's another path is ~/Library/Application\ Support/com.cmuxterm.app/config.ghostty for version >= 0.64.0

If you want the v0.63.2 default look, try write these to it

# v0.63.2 default look — bundled theme "Ghostty Default Style Dark"
# Source: Resources/ghostty/themes/Ghostty Default Style Dark @ v0.63.2

palette = 0=#1d1f21
palette = 1=#cc6566
palette = 2=#b6bd68
palette = 3=#f0c674
palette = 4=#82a2be
palette = 5=#b294bb
palette = 6=#8abeb7
palette = 7=#c4c8c6
palette = 8=#666666
palette = 9=#d54e53
palette = 10=#b9ca4b
palette = 11=#e7c547
palette = 12=#7aa6da
palette = 13=#c397d8
palette = 14=#70c0b1
palette = 15=#eaeaea

background = #282c34
foreground = #ffffff
cursor-color = #ffffff
cursor-text = #353a44
selection-background = #ffffff
selection-foreground = #282c34

background-opacity = 1.0
background-blur = false

font-size = 16