Hot corners config can't pass validation

[PowerfulGhost]

I tried to config hot corners in my config.kdl according to wiki page, but it can't pass the validation.

niri validate output:

Error:   × error loading config
  ├─▶ error parsing
  ╰─▶ error parsing KDL

Error:   × unexpected node `top-right`
    ╭─[config.kdl:83:1]
 83 │     hot-corners {
 84 │         top-right
    ·         ─────┬────
    ·              ╰── unexpected node
 85 │     }
 86 │ }
    ╰────

my full config:

input {
    keyboard {
        xkb {}
        numlock
    }

    touchpad {
        tap
        natural-scroll
    }

    mouse {}

    trackpoint {}
}

output "DP-2" {
    scale 1.75
    position x=0 y=0

}

output "HDMI-A-1" {
    transform "90"
    scale 2
    position x=-1080 y=-325
}

prefer-no-csd

layout {
    gaps 8

    center-focused-column "never"

    preset-column-widths {
        proportion 0.33333
        proportion 0.5
        proportion 0.66667
        proportion 1.0
    }

    preset-window-heights {
        proportion 0.33333
        proportion 0.5
        proportion 0.66667
        proportion 1.0
    }

    default-column-width { proportion 0.33333; }

    focus-ring {
        width 3
        active-gradient from="#ffb86c" to="#bd93f9" angle=135
    }
}

hotkey-overlay {
    skip-at-startup
}

screenshot-path "~/Pictures/Screenshots/Screenshot from %Y-%m-%d %H-%M-%S.png"

animations {}

window-rule {
    geometry-corner-radius 8
    clip-to-geometry true
    draw-border-with-background false
}

window-rule {
    match app-id=r#"^org\.wezfurlong\.wezterm$"#
    default-column-width {}
}

window-rule {
    match app-id=r#"firefox$"# title="^Picture-in-Picture$"
    open-floating true
}

gestures {
    hot-corners {
        top-right
    }
}

binds {
    Mod+Shift+Slash { show-hotkey-overlay; }

    Mod+T hotkey-overlay-title="Open a Terminal: alacritty" { spawn "alacritty"; }
    Mod+D hotkey-overlay-title="Run an Application: fuzzel" { spawn "fuzzel"; }
    Super+Alt+L hotkey-overlay-title="Lock the Screen: swaylock" { spawn "swaylock"; }

    Super+Alt+S allow-when-locked=true hotkey-overlay-title=null { spawn-sh "pkill orca || exec orca"; }

    XF86AudioRaiseVolume allow-when-locked=true { spawn-sh "wpctl set-volume @DEFAULT_AUDIO_SINK@ 0.1+"; }
    XF86AudioLowerVolume allow-when-locked=true { spawn-sh "wpctl set-volume @DEFAULT_AUDIO_SINK@ 0.1-"; }
    XF86AudioMute        allow-when-locked=true { spawn-sh "wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle"; }
    XF86AudioMicMute     allow-when-locked=true { spawn-sh "wpctl set-mute @DEFAULT_AUDIO_SOURCE@ toggle"; }

    XF86MonBrightnessUp allow-when-locked=true { spawn "brightnessctl" "--class=backlight" "set" "+10%"; }
    XF86MonBrightnessDown allow-when-locked=true { spawn "brightnessctl" "--class=backlight" "set" "10%-"; }

    Mod+O repeat=false { toggle-overview; }

    Mod+Q repeat=false { close-window; }

    Mod+Left  { focus-column-left; }
    Mod+Down  { focus-window-down; }
    Mod+Up    { focus-window-up; }
    Mod+Right { focus-column-right; }
    Mod+H     { focus-column-left; }
    Mod+J     { focus-window-down; }
    Mod+K     { focus-window-up; }
    Mod+L     { focus-column-right; }

    Mod+Ctrl+Left  { move-column-left; }
    Mod+Ctrl+Down  { move-window-down; }
    Mod+Ctrl+Up    { move-window-up; }
    Mod+Ctrl+Right { move-column-right; }
    Mod+Ctrl+H     { move-column-left; }
    Mod+Ctrl+J     { move-window-down; }
    Mod+Ctrl+K     { move-window-up; }
    Mod+Ctrl+L     { move-column-right; }

    Mod+Home { focus-column-first; }
    Mod+End  { focus-column-last; }
    Mod+Ctrl+Home { move-column-to-first; }
    Mod+Ctrl+End  { move-column-to-last; }

    Mod+Shift+Left  { focus-monitor-left; }
    Mod+Shift+Down  { focus-monitor-down; }
    Mod+Shift+Up    { focus-monitor-up; }
    Mod+Shift+Right { focus-monitor-right; }
    Mod+Shift+H     { focus-monitor-left; }
    Mod+Shift+J     { focus-monitor-down; }
    Mod+Shift+K     { focus-monitor-up; }
    Mod+Shift+L     { focus-monitor-right; }

    Mod+Shift+Ctrl+Left  { move-column-to-monitor-left; }
    Mod+Shift+Ctrl+Down  { move-column-to-monitor-down; }
    Mod+Shift+Ctrl+Up    { move-column-to-monitor-up; }
    Mod+Shift+Ctrl+Right { move-column-to-monitor-right; }
    Mod+Shift+Ctrl+H     { move-column-to-monitor-left; }
    Mod+Shift+Ctrl+J     { move-column-to-monitor-down; }
    Mod+Shift+Ctrl+K     { move-column-to-monitor-up; }
    Mod+Shift+Ctrl+L     { move-column-to-monitor-right; }

    Mod+Page_Down      { focus-workspace-down; }
    Mod+Page_Up        { focus-workspace-up; }
    Mod+U              { focus-workspace-down; }
    Mod+I              { focus-workspace-up; }
    Mod+Ctrl+Page_Down { move-column-to-workspace-down; }
    Mod+Ctrl+Page_Up   { move-column-to-workspace-up; }
    Mod+Ctrl+U         { move-column-to-workspace-down; }
    Mod+Ctrl+I         { move-column-to-workspace-up; }

    Mod+Shift+Page_Down { move-workspace-down; }
    Mod+Shift+Page_Up   { move-workspace-up; }
    Mod+Shift+U         { move-workspace-down; }
    Mod+Shift+I         { move-workspace-up; }

    Mod+WheelScrollDown      cooldown-ms=150 { focus-workspace-down; }
    Mod+WheelScrollUp        cooldown-ms=150 { focus-workspace-up; }
    Mod+Ctrl+WheelScrollDown cooldown-ms=150 { move-column-to-workspace-down; }
    Mod+Ctrl+WheelScrollUp   cooldown-ms=150 { move-column-to-workspace-up; }

    Mod+WheelScrollRight      { focus-column-right; }
    Mod+WheelScrollLeft       { focus-column-left; }
    Mod+Ctrl+WheelScrollRight { move-column-right; }
    Mod+Ctrl+WheelScrollLeft  { move-column-left; }

    Mod+Shift+WheelScrollDown      { focus-column-right; }
    Mod+Shift+WheelScrollUp        { focus-column-left; }
    Mod+Ctrl+Shift+WheelScrollDown { move-column-right; }
    Mod+Ctrl+Shift+WheelScrollUp   { move-column-left; }

    Mod+1 { focus-workspace 1; }
    Mod+2 { focus-workspace 2; }
    Mod+3 { focus-workspace 3; }
    Mod+4 { focus-workspace 4; }
    Mod+5 { focus-workspace 5; }
    Mod+6 { focus-workspace 6; }
    Mod+7 { focus-workspace 7; }
    Mod+8 { focus-workspace 8; }
    Mod+9 { focus-workspace 9; }
    Mod+Ctrl+1 { move-column-to-workspace 1; }
    Mod+Ctrl+2 { move-column-to-workspace 2; }
    Mod+Ctrl+3 { move-column-to-workspace 3; }
    Mod+Ctrl+4 { move-column-to-workspace 4; }
    Mod+Ctrl+5 { move-column-to-workspace 5; }
    Mod+Ctrl+6 { move-column-to-workspace 6; }
    Mod+Ctrl+7 { move-column-to-workspace 7; }
    Mod+Ctrl+8 { move-column-to-workspace 8; }
    Mod+Ctrl+9 { move-column-to-workspace 9; }

    Mod+BracketLeft  { consume-or-expel-window-left; }
    Mod+BracketRight { consume-or-expel-window-right; }

    Mod+Comma  { consume-window-into-column; }
    Mod+Period { expel-window-from-column; }

    Mod+R { switch-preset-column-width; }
    Mod+Shift+R { switch-preset-window-height; }
    Mod+Ctrl+R { reset-window-height; }
    Mod+F { maximize-column; }
    Mod+Shift+F { fullscreen-window; }

    Mod+Ctrl+F { expand-column-to-available-width; }

    Mod+C { center-column; }

    Mod+Ctrl+C { center-visible-columns; }

    Mod+Minus { set-column-width "-10%"; }
    Mod+Equal { set-column-width "+10%"; }

    Mod+Shift+Minus { set-window-height "-10%"; }
    Mod+Shift+Equal { set-window-height "+10%"; }

    Mod+V       { toggle-window-floating; }
    Mod+Shift+V { switch-focus-between-floating-and-tiling; }

    Mod+W { toggle-column-tabbed-display; }

    Print { screenshot; }
    Ctrl+Print { screenshot-screen; }
    Alt+Print { screenshot-window; }

    Mod+Escape allow-inhibiting=false { toggle-keyboard-shortcuts-inhibit; }

    Mod+Shift+E { quit; }
    Ctrl+Alt+Delete { quit; }

    Mod+Shift+P { power-off-monitors; }
}

System Information

• niri version: niri 25.08 (01be0e6)

• Distro: Arch linux

• GPU: AMD 7900xtx

• CPU: AMD 7950x

[QaidVoid]

Hot corners config was only merged in commit 08f5c6f. You’ll need to build niri from that commit or later to use this feature.

[petereichinger]

I got them to work and configured them per output with niri-git from the AUR:

output "DP-1" {
    mode "2560x1440@165.000"
    scale 1
    transform "normal"
    position x=0 y=0
    hot-corners {
        top-left
        bottom-left
    }
}

output "DP-3" {
    mode "1920x1080@144.001"
    variable-refresh-rate
    scale 1
    transform "90"
    position x=2560 y=0
    hot-corners {
        top-right
        bottom-right
    }
    layout {
        default-column-width { proportion 1.0; }
    }
}

[cornservant]

The configuration examples in the overview sections of the wiki are deceptive, as they contain options that are not released yet. If you scroll down to the hot-corners section, you can spot a little label telling you that the option is going to be included in a future release.

(from https://yalter.github.io/niri/Configuration%3A-Gestures.html#hot-corners)

[PowerfulGhost]

@QaidVoid @petereichinger @cornservant thanks for the replies. I'll close the issue and wait for next release then.