arthur-os/docs/omarchy-shell.md

omarchy-shell

A single long-running Quickshell instance that hosts the Omarchy desktop. The bar, panels, overlays, menus, and services all run inside as plugins. IPC is the canonical way for CLIs to talk to a running shell — omarchy-shell-ipc auto-starts it on first call.

Plugin manifest

{
  "schemaVersion": 1,
  "id": "my.org.cool-clock",
  "name": "Cool clock",
  "version": "1.0.0",
  "author": "You",
  "description": "A clock that does cool things",
  "kinds": ["bar-widget"],
  "activation": "on-demand",
  "entryPoints": { "barWidget": "Widget.qml" }
}

kinds (a manifest may declare more than one):

Kind	What it is
bar-widget	Component the bar drops into a section
panel	Floating window (e.g. bar settings)
overlay	Fullscreen overlay (e.g. background picker)
menu	Summoned menu surface
service	Headless singleton, no UI

activation is persistent (loaded at startup) or on-demand (loaded by shell summon, unloaded by shell hide). On-demand plugins can set keepLoaded: true to survive between summons.

Full schema: shell/services/PluginRegistry.qml.

Installing a third-party plugin

1. Drop into ~/.config/omarchy/plugins/<id>/ with a manifest.json plus the QML referenced from entryPoints.
2. omarchy-shell-ipc shell rescanPlugins
3. omarchy-shell-ipc shell setPluginEnabled <id> true
4. Bar widgets also need adding to a section via bar settings.

IPC

The shell exposes a shell target plus extra targets registered by individual plugins (bar, image-selector, …).

Method	Effect
ping	health check
summon <id> <payloadJson>	load + open a plugin
hide <id>	close a previously-summoned
toggle <id> <payloadJson>	summon if closed, hide if open
rescanPlugins	re-walk plugin dirs
setPluginEnabled <id> <"true"|…>	flip enabled bit
listPlugins	JSON of every discovered plugin

setPluginEnabled takes a string; only literal "true" enables.

shell.json

{
  "version": 1,
  "bar": {
    "position": "top",
    "transparent": false,
    "centerAnchor": "calendar",
    "fontFamily": "JetBrainsMono Nerd Font",
    "layout": {
      "left":   [ { "id": "omarchy" } ],
      "center": [ { "id": "calendar", "format": "HH:mm" } ],
      "right":  [ { "id": "audioPanel" } ]
    }
  },
  "plugins": [
    { "id": "community.weather-extra" }
  ]
}

Rules:

1. Every plugin instance is one entry — bar.layout.<section> for bar widgets, plugins[] for everything else.
2. Settings are inline on the entry. No config: sub-object, no merge layers.
3. Enabled ⇔ present.
4. allowMultiple: true in the manifest permits multiple instances.
5. version: 1 is required.

shell-defaults.json describes the fresh-install state. When no user shell.json exists, defaults are used verbatim. Once the user customizes, shell.json is canonical — there is no deep-merge.

Theme tokens

Themes ship colors in themes/<name>/colors.toml and surface roles + sizing in themes/<name>/shell.toml. Defaults are generated from default/themed/shell.toml.tpl; a theme may also drop a hand-written shell.toml next to its colors.toml to override individual keys.

The shell exposes these tokens to QML via two singletons in qs.Commons:

• Color — palette (foreground, background, accent, urgent) and per-surface roles (Color.bar.*, Color.popups.*, Color.notifications.*, Color.menu.*, Color.imagePicker.*).
• Style — structural tokens (cornerRadius), shared interactive state tokens/helpers, spacing (Style.spacing.* / Style.space(px)), the type scale (Style.font.*), and bar dimensions (Style.bar.sizeHorizontal / Style.bar.sizeVertical).

Interactive states

[style] standardizes reusable control chrome around four states: normal, hover-cursor, selected, and focus. State colors can be palette roles (foreground, accent, urgent, background) or hex strings. Fill/border alphas are applied to that state's color.

Focus inherits hover-cursor by default so mouse hover, the panel keyboard cursor, and Qt activeFocus read as the same state. Use the literal value "hover-cursor" on focus-* tokens to keep that inheritance; set an explicit color/number only when a theme intentionally wants focus to differ.

State	Color token	Fill alpha	Border width	Border alpha
Normal idle chrome	normal-color	normal-fill-alpha	normal-border-width	normal-border-alpha
Hover / keyboard cursor	hover-cursor-color	hover-cursor-fill-alpha	hover-cursor-border-width	hover-cursor-border-alpha
Persistent selected/current	selected-color	selected-fill-alpha	selected-border-width	selected-border-alpha
Qt activeFocus	focus-color	focus-fill-alpha	focus-border-width	focus-border-alpha

Border widths are the theme-level on/off switches for state borders; set a width to 0 to keep the fill while removing that state border. The default theme keeps selected borders off globally (selected-border-width = 0); explicitly bordered controls can still keep their normal border when selected.

[style]
# Accent-tinted cursor/focus, foreground-tinted selected state.
hover-cursor-color = "accent"
focus-color        = "hover-cursor"
selected-color     = "foreground"

# Keep selected fills but remove selected-state borders.
selected-border-width = 0

Momentary fills use pressed-fill-alpha for button press feedback and selection-fill-alpha for text selection. Themes may also provide pressed-color or selection-color; they fall back to hover-cursor and foreground respectively.

Spacing

[spacing] scale multiplies the shell's shared margins, gaps, and padding. The default is 1.0; values above 1.0 create more breathing room while values below 1.0 make controls denser.

[spacing]
scale = 1.15  # roomier panels and controls

QML components should prefer semantic tokens where possible:

Token	Default use
Style.spacing.controlPaddingX / controlPaddingY	Button and tooltip padding
Style.spacing.inputPaddingY	Text-field vertical padding
Style.spacing.controlHeight / popupRowHeight	Dropdown and number-field row heights
Style.spacing.dropdownWidth / searchableDropdownWidth / numberFieldWidth	Default field widths
Style.spacing.searchablePopupMinHeight	Minimum searchable dropdown popup height
Style.spacing.controlGap	Gap between icon and label inside controls
Style.spacing.labelGap	Label-to-control and compact list gaps
Style.spacing.rowGap / rowPaddingX	Form rows and list row content
Style.spacing.panelGap / panelPadding	Panel section spacing and interior padding
Style.spacing.popupPadding	Popout interior padding

Popout placement deliberately follows Hyprland's general:gaps_out (Style.gapsOut) so panels align with tiled windows. Use a theme's hyprland.lua to change that outer alignment; [spacing] controls the interior breathing room.

For one-off proportional constants, use Style.space(px) to preserve the old default at scale 1.0 while still responding to the theme scale. Use Style.spaceReal(px) only for fractional geometry that should not be rounded, such as bar widget text margins. Themes can override any semantic token directly in [spacing], e.g.:

[spacing]
scale = 1.0
panel-padding = 22
row-gap = 10

Typography

[font] base-size is the rem root for the scale. Every Style.font.<token> derives from it via a fixed multiplier, so bumping base-size rescales the whole shell proportionally:

Token	Multiplier	Default
Style.font.caption	0.833	10
Style.font.bodySmall	0.917	11
Style.font.body	1.0	12
Style.font.subtitle	1.083	13
Style.font.title	1.167	14
Style.font.heading	1.333	16
Style.font.display	2.0	24
Style.font.displayLarge	2.333	28
Style.font.iconSmall	bodySmall	11
Style.font.icon	title	14
Style.font.iconLarge	1.5	18

A theme can either scale everything by tweaking base-size:

[font]
base-size = 13   # roomier

…or pin individual tokens for stylistic emphasis without affecting the rest of the scale:

[font]
base-size = 12
heading       = 20
display-large = 36

Recognized override keys: base-size, caption, body-small, body, subtitle, title, heading, display, display-large, icon-small, icon, icon-large.

base-size is clamped to 11..13 because some row heights and the bar cross-axis size remain fixed; per-token overrides aren't clamped. The shell font family is the fontconfig monospace alias — themes don't set it, the user does via omarchy font set <name>.

Bar size

[bar] size-horizontal / size-vertical set the cross-axis dimension of top/bottom and left/right bars respectively (in px):

[bar]
size-horizontal = 26   # top/bottom bar height
size-vertical   = 28   # left/right bar width

Custom bar modules

If a full plugin is overkill, declare a one-off module inline in bar.layout.<section>:

{ "id": "vpn", "type": "command", "exec": "~/.config/omarchy/bar/scripts/vpn-status",
  "interval": 5, "tooltip": "VPN", "onClick": "nm-connection-editor" }

Output is plain text or Waybar-style JSON ({ "text": ..., "tooltip": ..., "class": ... }).

For a custom QML widget:

{ "id": "gpu", "type": "qml" }

Then ~/.config/omarchy/bar/modules/gpu.qml (or set source to point elsewhere). The module is an Item and receives bar, moduleName, settings properties. bar exposes foreground / background / urgent / fontFamily / position / vertical / barSize, plus run(cmd), shellQuote(v), showTooltip(t, s) / hideTooltip(t), requestPopout(o) / releasePopout(o).