#Konfiguration

cmux liest die Konfiguration aus Ghostty-Konfigurationsdateien, was Ihnen vertraute Optionen bietet, wenn Sie von Ghostty kommen.

#Speicherorte der Konfigurationsdatei

cmux sucht an diesen Speicherorten nach Konfiguration (in dieser Reihenfolge):

~/.config/ghostty/config
~/Library/Application Support/com.mitchellh.ghostty/config

Erstellen Sie die Konfigurationsdatei, falls sie nicht existiert:

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

#Beispielkonfiguration

~/.config/ghostty/config

font-family = SF Mono
font-size = 13
sidebar-font-size = 14
surface-tab-bar-font-size = 11
theme = One Dark
scrollback-limit = 50000000
split-divider-color = #3e4451
working-directory = ~/code

#cmux.json

cmux keeps app-owned settings, shortcuts, actions, custom commands, and workspace layouts in ~/.config/cmux/cmux.json. Terminal rendering still lives in Ghostty config. On launch, if the file is missing, cmux writes a commented template there.

Open cmux Settings, then use the cmux.json section to open the canonical file in your preferred text editor.

~/.config/cmux/cmux.json
.cmux/cmux.json in a project for project-scoped actions and workspace commands

Precedence: global ~/.config/cmux/cmux.json settings override values saved in the Settings window. Legacy ~/.config/cmux/settings.json and Application Support settings files are read only as fallback for missing settings keys. Project-local .cmux/cmux.json can override actions, commands, UI action wiring, and notification hooks, but not global app preferences.

Reload: edit the file, then use Cmd+Shift+, or cmux reload-config to re-read it without restarting the app.

Migrations: keep schemaVersion at 1 for now. Future cmux versions will use that field for upgrades. If cmux sees a newer schema version, it logs a warning and parses known keys only.

The file accepts JSON with comments and trailing commas. The canonical schema is published at https://raw.githubusercontent.com/manaflow-ai/cmux/main/web/data/cmux.schema.json and the source lives at https://github.com/manaflow-ai/cmux/blob/main/web/data/cmux.schema.json.

~/.config/cmux/cmux.json

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

  // "app": {
  //   "appearance": "dark",
  //   "menuBarOnly": false,
  //   "newWorkspacePlacement": "afterCurrent",
  //   "windowTitleTemplate": "[cmux:{windowToken}] {activeWorkspace}",
  //   "confirmQuit": "always",
  //   "openSupportedFilesInCmux": true,
  //   "workspaceInheritWorkingDirectory": true,
  //   "iMessageMode": true
  // },

  // "terminal": {
  //   "showScrollBar": false,
  //   "copyOnSelect": true,
  //   "autoResumeAgentSessions": true,
  //   "showTextBoxOnNewTerminals": false,
  //   "focusTextBoxOnNewTerminals": false,
  //   "agentHibernation": {
  //     "enabled": false,
  //     "idleSeconds": 5,
  //     "maxLiveTerminals": 12
  //   },
  //   "textBoxMaxLines": 10
  // },

  // "browser": {
  //   "defaultSearchEngine": "kagi",
  //   // For an unlisted provider, set "defaultSearchEngine": "custom" and fill these:
  //   "customSearchEngineName": "My Search",
  //   "customSearchEngineURLTemplate": "https://search.example.com/?q={query}",
  //   "openTerminalLinksInCmuxBrowser": true,
  //   "hostsToOpenInEmbeddedBrowser": ["localhost", "*.internal.example"]
  // },

  // "markdown": {
  //   // Default body font size (points) for newly opened markdown viewers.
  //   // Zoom a viewer live with Cmd-+ / Cmd-- / Cmd-0.
  //   "fontSize": 15,
  //   // Default body font family. Empty keeps the system markdown font stack.
  //   "fontFamily": "",
  //   // Default maximum reading column width, in CSS pixels.
  //   "maxWidth": 980
  // },

  // "fileEditor": {
  //   // Wrap long lines at the editor's right edge instead of scrolling horizontally.
  //   "wordWrap": false
  // },

  // "fileExplorer": {
  //   // Doppelklick auf eine Datei: preview (Standard), defaultEditor (macOS-Standard-App) oder preferredEditor (der app.preferredEditor-Befehl).
  //   "doubleClickAction": "preview"
  // },

  // "automation": {
  //   "suppressSubagentNotifications": true
  // },

  // "workspaceColors": {
  //   "colors": {
  //     "Red": "#C0392B",
  //     "Blue": "#1565C0",
  //     "Neon Mint": "#00F5D4"
  //   }
  // },

  // "workspaceGroups": {
  //   "newWorkspacePlacement": "afterCurrent"
  // },

  // "agentChat": {
  //   "url": "http://127.0.0.1:7739",
  //   "startCommand": "cmux-chat"
  // },

  // "shortcuts": {
  //   "bindings": {
  //     "toggleSidebar": "cmd+b",
  //     "toggleFileExplorer": "cmd+opt+b",
  //     "newTab": ["ctrl+b", "c"],
  //     "commandPalettePrevious": null
  //   }
  // },
}

#Schema reference

This reference covers every supported global settings key in cmux.json. The embedded browser, terminal, sidebar, notifications, automation, and cmux-owned keyboard shortcuts all live here. Actions and workspace commands are documented on the custom commands page.

#Metadata

$schema

Optional schema URL for editor completion and validation.

Type: string
Default: "https://raw.githubusercontent.com/manaflow-ai/cmux/main/web/data/cmux.schema.json"

schemaVersion

Schema version for forward-compatible migrations. Newer versions are parsed on a best-effort basis.

Type: integer
Default: 1

#`app`

General app preferences from Settings > App.

app.language

Preferred app language.

Type: string
Default: "system"
Allowed values: system, en, ar, bs, zh-Hans, zh-Hant, da, de, es, fr, it, ja, ko, nb, pl, pt-BR, ru, th, tr

app.appearance

App appearance mode.

Type: string
Default: "system"
Allowed values: system, light, dark

app.appIcon

Dock and app switcher icon style.

Type: string
Default: "automatic"
Allowed values: automatic, light, dark

app.windowTitleTemplate

Optionale Vorlage für den NSWindow-Titel. Leer behält das bestehende Standardtitelverhalten von cmux bei, einschließlich Fallback auf das aktuelle Verzeichnis. Unterstützte Platzhalter: {windowId}, {windowToken}, {activeWorkspace}, {activeDirectory}, {defaultTitle}, {appName}.

Type: string
Default: ""

app.menuBarOnly

Hide the Dock icon and app switcher entry while keeping cmux available from the menu bar.

Type: boolean
Default: false

app.newWorkspacePlacement

Where new workspaces are inserted in the sidebar.

Type: string
Default: "afterCurrent"
Allowed values: top, afterCurrent, end

app.forkConversationDefaultDestination

Standardziel für die primäre Fork Conversation-Aktion im Tab-Kontextmenü. Das Untermenü zeigt weiterhin alle Ziele.

Type: string
Default: "right"
Allowed values: right, left, top, bottom, newTab, newWorkspace

app.workspaceInheritWorkingDirectory

When true, new workspaces inherit the current workspace working directory. When false, new workspaces use Ghostty's working-directory setting instead.

Type: boolean
Default: true

app.minimalMode

Hide the workspace title bar and move controls into the sidebar.

Type: boolean
Default: false

app.keepWorkspaceOpenWhenClosingLastSurface

When true, closing the last surface keeps the workspace open.

Type: boolean
Default: false

app.focusPaneOnFirstClick

When cmux is inactive, the first click can activate and focus the clicked pane.

Type: boolean
Default: true

app.focusHistoryIncludesPanesAndTabs

When true, Back and Forward include focus changes between panes and tabs. When false, they navigate between workspaces only.

Type: boolean
Default: false

app.preferredEditor

Custom editor command used when Cmd-click file previews are disabled or a file is unsupported. Leave empty to use the default.

Type: string
Default: ""

app.openSupportedFilesInCmux

When enabled, Cmd-clicking readable local files opens supported previews in cmux, including text, code, PDFs, images, audio, video, and Quick Look files. Preview headers include an Open With menu based on the user's default and compatible macOS apps for that file.

Type: boolean
Default: true

app.openMarkdownInCmuxViewer

When enabled, Cmd-clicking .md/.markdown/.mkd/.mdx files opens the rendered cmux markdown viewer panel (with live reload) instead of the generic file preview.

Type: boolean
Default: true

app.globalFontMagnification

Skaliert cmux-eigene Terminals, Tab-Titel, Seitenleisten, Einstellungen, Overlays und App-Chrome um diesen Prozentsatz. Gerenderte Browserseiteninhalte sind ausgeschlossen.

Type: integer
Default: 100

app.reorderOnNotification

Move workspaces with new notifications toward the top.

Type: boolean
Default: true

app.iMessageMode

Move a workspace to the top and show the submitted message when sending an agent prompt.

Type: boolean
Default: false

app.sendAnonymousTelemetry

Allow anonymous telemetry.

Type: boolean
Default: true

app.confirmQuit

Steuert, wann cmux vor dem Beenden eine Bestätigung anfordert. DEV-Builds beenden sich unabhängig von dieser Einstellung immer sofort. Das ältere app.warnBeforeQuit wird weiterhin als boolescher Fallback akzeptiert.

Type: string
Default: "always"
Allowed values: always, dirty-only, never

app.warnBeforeQuit

Älterer boolescher Fallback für die Beenden-Bestätigung. Verwenden Sie app.confirmQuit für neue Konfigurationen.

Type: boolean
Default: true

app.warnBeforeClosingTab

Show a confirmation before closing a tab.

Type: boolean
Default: true

app.warnBeforeClosingTabXButton

Vor dem Schließen eines Tabs über die Tab-Schließen-Schaltfläche eine Bestätigung anzeigen.

Type: boolean
Default: false

app.hideTabCloseButton

Tab-Schließen-Schaltflächen in der Pane-Tableiste ausblenden.

Type: boolean
Default: false

app.renameSelectsExistingName

Select the current name when opening rename flows.

Type: boolean
Default: true

app.commandPaletteSearchesAllSurfaces

Search every surface in the command palette switcher instead of only the active workspace.

Type: boolean
Default: false

#`terminal`

Terminal presentation settings from Settings > Terminal.

terminal.showScrollBar

Show the right-edge terminal scroll bar when scrollback is available. cmux automatically suppresses it for alternate-screen style TUI surfaces.

Type: boolean
Default: true

terminal.scrollSpeed

Multiplikator für die Scroll-Werte von Mausrad und Trackpad im Terminal. Höhere Werte scrollen schneller, niedrigere Werte langsamer.

Type: number
Default: 1

terminal.sessionContentMaxWidth

Optionale maximale Breite in Punkten für Terminalinhalte und den integrierten Agentenchat. Mit false wird die gesamte Breite des Bereichs verwendet.

Type: boolean | number
Default: false

terminal.sessionContentAlignment

Horizontale Position von Terminalinhalten und integriertem Agentenchat, wenn sessionContentMaxWidth aktiviert ist.

Type: string
Default: "center"
Allowed values: left, center, right

terminal.copyOnSelect

Bei true wird ausgewählter Terminaltext in die Systemzwischenablage kopiert, sobald die Auswahl bestätigt wird. Bei false gibt cmux keine Ghostty-copy-on-select-Überschreibung aus; Ghostty-Konfiguration und Standardwerte steuern das Verhalten der Auswahlzwischenablage.

Type: boolean
Default: false

terminal.autoResumeAgentSessions

Automatically run agent resume commands for restored terminal sessions when cmux reopens after quit. Set false to restore panes while keeping Claude Code, Codex, OpenCode, and other saved agent sessions idle until you resume them manually.

Type: boolean
Default: true

terminal.showTextBoxOnNewTerminals

Zeigt die Beta-TextBox-Eingabe standardmaessig fuer neu erstellte Workspaces, Terminal-Tabs und Terminal-Splits an.

Type: boolean
Default: false

terminal.focusTextBoxOnNewTerminals

Fokussiert die Beta-TextBox-Eingabe standardmaessig fuer neu erstellte Workspaces, Terminal-Tabs und Terminal-Splits. Fokussieren zeigt die TextBox ebenfalls an.

Type: boolean
Default: false

terminal.agentHibernation

Routine Agent Hibernation settings. cmux kills idle background agent processes to free RAM and CPU, then resumes them with their saved session when their tab is visited. Routine hibernation requires a restorable coding agent whose lifecycle reports idle, an off-screen terminal, a live-terminal count above the configured limit, and unchanged output through the idle and confirmation windows. Independently, during critical memory pressure cmux may hibernate a bounded batch of safe idle background agents even when enabled is false; visible, running, needs-input, recently changed, and unprotectable agents remain excluded. The placeholder Resume button is a manual fallback.

Type: object
Default: none

terminal.rendererRealization

Reclaim off-screen terminal GPU renderer memory. cmux releases the Metal renderer (IOSurface) of a terminal that has stayed off-screen and idle while keeping its process and terminal state alive, then rebuilds the renderer instantly when the tab is visited again. Non-destructive and on by default.

Type: object
Default: none

terminal.textBoxMaxLines

Maximum number of lines the rich terminal TextBox input can grow to before it scrolls.

Type: integer
Default: 10

terminal.textBoxDefaultSubmitAction

Default TextBox submit action ID for new terminal sessions. Use text-entry for plain input or one of the configured action IDs.

Type: string
Default: "text-entry"

terminal.textBoxSubmitActions

Configurable TextBox submit actions shown on the submit button, Shift-Tab cycle, and right-click menu.

Type: array<object>
Default: []

terminal.resumeCommands

Signed command-prefix approvals for restoring non-agent terminal surfaces. cmux writes this list when you approve a surface resume command.

Type: array<object>
Default: []

terminal.uploadCommands

Host-scoped rules that replace the built-in scp for terminal file drops and pastes over SSH. When the ssh destination matches a rule, cmux runs that rule's command once per file instead of scp, and inserts the command's stdout at the cursor (verbatim, with control characters stripped); if the command prints nothing, cmux inserts the shell-escaped remote path it chose instead. Per-file outputs are space-joined. First matching enabled rule wins; no match runs the built-in scp unchanged. A non-zero exit, timeout, or cancel inserts nothing.

Type: array<object>
Default: []

#`notifications`

Notification behavior from Settings > Notifications.

notifications.dockBadge

Show the unread count in the Dock tile.

Type: boolean
Default: true

notifications.showInMenuBar

Show the menu bar extra.

Type: boolean
Default: true

notifications.unreadPaneRing

Highlight panes with unread notifications.

Type: boolean
Default: true

notifications.paneFlash

Flash the focused pane when requested.

Type: boolean
Default: true

notifications.suppressOnlyFocusedSurface

Wenn aktiviert, wird ein Benachrichtigungsbanner nur dann automatisch zurückgezogen, wenn seine Oberfläche genau die fokussierte Oberfläche ist. Ein Banner, das für eine nicht fokussierte Oberfläche im aktuell sichtbaren Workspace zugestellt wurde, bleibt sichtbar, bis Sie diese Oberfläche fokussieren (oder das Banner anklicken bzw. schließen), anstatt zurückgezogen zu werden, sobald der Workspace sichtbar wird. Deaktiviert bleibt das bisherige Zurückziehen anhand der Workspace-Sichtbarkeit erhalten.

Type: boolean
Default: false

notifications.agentPermissionPrompt

Notify when an agent (e.g. Claude Code) is blocked waiting for your permission to run a tool. On by default, since this is the alert you must act on to unblock the agent.

Type: boolean
Default: true

notifications.agentTurnComplete

When to notify that an agent finished a turn. whenIdle (default) suppresses the notification while the agent still has a running background task or a pending scheduled wakeup, so you are pinged once work truly drains. always notifies on every turn end; never disables it.

Type: string
Default: "whenIdle"
Allowed values: whenIdle, always, never

notifications.agentIdleReminder

Notify when an agent has been idle waiting for your input (about 60s after a turn ends). Suppressed while background work from the last turn is still pending, so a running build or watcher does not trigger a false waiting alert.

Type: boolean
Default: true

notifications.sound

Notification sound preset.

Type: string
Default: "default"
Allowed values: default, Basso, Blow, Bottle, Frog, Funk, Glass, Hero, Morse, Ping, Pop, Purr, Sosumi, Submarine, Tink, custom_file, none

notifications.customSoundFilePath

Local path to the custom notification sound file.

Type: string
Default: ""

notifications.command

Optional shell command to run alongside notification delivery.

Type: string
Default: ""

notifications.hooksMode

Controls whether project-local notification hooks append to inherited hooks or replace them.

Type: string
Default: "append"
Allowed values: append, replace

notifications.hooks

Composable shell hooks that receive notification policy JSON on stdin and return updated policy JSON on stdout.

Type: array<object>
Default: []

#`sidebar`

Sidebar content and metadata visibility from Settings > Sidebar.

sidebar.hideAllDetails

Hide all per-workspace detail rows.

Type: boolean
Default: false

sidebar.wrapWorkspaceTitles

Allow workspace titles in the sidebar to wrap to multiple lines instead of truncating after one line.

Type: boolean
Default: false

sidebar.showWorkspaceDescription

Show custom workspace descriptions in the sidebar.

Type: boolean
Default: true

sidebar.beta

Experimental sidebar features.

Type: object
Default: none

sidebar.branchLayout

Show git branch details stacked vertically or inline.

Type: string
Default: "vertical"
Allowed values: vertical, inline

sidebar.showNotificationMessage

Show the latest notification text in the sidebar.

Type: boolean
Default: true

sidebar.notificationMessageLineLimit

Maximale Anzahl der Zeilen, die für die neueste Benachrichtigung unter jedem Workspace-Titel angezeigt werden.

Type: integer
Default: 12

sidebar.showBranchDirectory

Show the workspace working directory.

Type: boolean
Default: true

sidebar.showPullRequests

Show pull request metadata in the sidebar.

Type: boolean
Default: true

sidebar.watchGitStatus

Watch repository files for sidebar branch and pull request metadata without polling git.

Type: boolean
Default: true

sidebar.makePullRequestsClickable

Allow sidebar pull request metadata to open links when clicked.

Type: boolean
Default: true

sidebar.openPullRequestLinksInCmuxBrowser

Open sidebar pull request links in the embedded cmux browser.

Type: boolean
Default: true

sidebar.openPortLinksInCmuxBrowser

Open sidebar port links in the embedded cmux browser.

Type: boolean
Default: true

sidebar.showSSH

Show SSH connection details.

Type: boolean
Default: true

sidebar.showPorts

Show listening ports.

Type: boolean
Default: true

sidebar.showLog

Show recent log snippets.

Type: boolean
Default: true

sidebar.showProgress

Show progress indicators.

Type: boolean
Default: true

sidebar.showAgentActivity

Show the loading spinner on workspaces with running coding agents or active loaders.

Type: boolean
Default: true

sidebar.loadingSpinnerPosition

Which side of the workspace row the loading spinner appears on: leading (left, sharing the unread-badge slot) or trailing (right).

Type: string
Default: "leading"
Allowed values: leading, trailing

sidebar.notificationBadgePosition

Which side of the workspace row the unread notification badge appears on: leading (left) or trailing (right).

Type: string
Default: "leading"
Allowed values: leading, trailing

sidebar.showCustomMetadata

Show custom metadata pills.

Type: boolean
Default: true

sidebar.rightMaxWidth

Maximale Breite der rechten Seitenleiste in Punkten. Wenn weggelassen, gilt die integrierte dynamische Obergrenze.

Type: number
Default: none

#`workspaceGroups`

Per-cwd customization for sidebar workspace groups. The anchor workspace's cwd is matched against the keys in `byCwd`; longest-match wins. Keys containing `*` or `?` are matched as fnmatch globs (with `~` expanded); other keys are path prefixes.

workspaceGroups.newWorkspacePlacement

Globaler Standard dafür, wo Cmd-N innerhalb einer Gruppe, die + Schaltfläche im Gruppenkopf und konfigurierte Gruppenaktionen den neuen Workspace platzieren: `afterCurrent` (nach dem aktiven Workspace in der Gruppe, mit Rückfall auf top), `top` (zweite Position direkt nach dem Anker) oder `end` (nach dem letzten Mitglied).

Type: string
Default: "afterCurrent"
Allowed values: afterCurrent, top, end

workspaceGroups.byCwd

Map of cwd patterns to group customization. Empty when omitted.

Type: object
Default: none

#`workspaceColors`

Workspace tab and badge colors from Settings > Workspace Colors.

workspaceColors.indicatorStyle

Active workspace indicator style. Legacy aliases are accepted and normalized.

Type: string
Default: "leftRail"
Allowed values: leftRail, solidFill, rail, border, wash, lift, typography, washRail, blueWashColorRail

workspaceColors.selectionColor

Override the selected workspace background color.

Type: unknown
Default: null

workspaceColors.notificationBadgeColor

Override the unread notification badge color.

Type: unknown
Default: null

workspaceColors.colors

Full named workspace color palette. Include built-in entries you want to keep, remove keys to remove colors, and add more named entries to extend the picker.

Type: object
Default: { "Red": "#C0392B", "Crimson": "#922B21", "Orange": "#A04000", "Amber": "#7D6608", "Olive": "#4A5C18", "Green": "#196F3D", "Teal": "#006B6B", "Aqua": "#0E6B8C", "Blue": "#1565C0", "Navy": "#1A5276", "Indigo": "#283593", "Purple": "#6A1B9A", "Magenta": "#AD1457", "Rose": "#880E4F", "Brown": "#7B3F00", "Charcoal": "#3E4B5E" }

workspaceColors.paletteOverrides

Legacy workspace color overrides for built-in palette names. Prefer workspaceColors.colors for new configs.

Type: object
Default: {}

workspaceColors.customColors

Legacy list of custom workspace colors. Prefer workspaceColors.colors for new configs.

Type: array<unknown>
Default: []

workspaceColors.colors is the full palette. Keep the built-in keys you want, delete keys to remove colors from the picker, and add more named color entries to extend it. Older paletteOverrides and customColors files still parse during upgrades, but new files should use colors.

{
  "workspaceColors": {
    "colors": {
      "Red": "#C0392B",
      "Blue": "#1565C0",
      "Neon Mint": "#00F5D4"
    }
  }
}

#`sidebarAppearance`

Sidebar tint settings from Settings > Sidebar Appearance.

sidebarAppearance.matchTerminalBackground

Use the terminal background instead of the sidebar tint.

Type: boolean
Default: false

sidebarAppearance.tintColor

Base sidebar tint color used when light/dark overrides are not set.

Type: unknown
Default: "#000000"

sidebarAppearance.lightModeTintColor

Sidebar tint override for light appearance.

Type: unknown
Default: null

sidebarAppearance.darkModeTintColor

Sidebar tint override for dark appearance.

Type: unknown
Default: null

sidebarAppearance.tintOpacity

Sidebar tint opacity from 0 to 1. Note: this only controls the sidebar tint, not terminal/window transparency. For terminal background transparency or blur, set `background-opacity` and `background-blur` in `~/.config/ghostty/config` and run `cmux reload-config`.

Type: number
Default: 0.03

#`automation`

Socket control and automation settings from Settings > Automation.

automation.socketControlMode

Socket control mode. Legacy aliases are accepted and normalized.

Type: string
Default: "cmuxOnly"
Allowed values: off, cmuxOnly, automation, password, allowAll, openAccess, fullOpenAccess, notifications, full

automation.socketPassword

Password for password-mode socket access. Use null or an empty string to clear it.

Type: string | null
Default: ""

automation.claudeCodeIntegration

Enable cmux integration hooks for Claude Code.

Type: boolean
Default: true

automation.claudeBinaryPath

Custom path to the claude binary.

Type: string
Default: ""

automation.workspaceAutoNaming

Opt-in: KI-basierte automatische Benennung von Workspaces und Tabs aus dem Gesprächsinhalt der Agenten. Wenn aktiviert, fasst cmux unterstützte Agent-Sitzungen mit dem eigenen Binary des jeweiligen Agenten zu kurzen Titeln zusammen; manuelle Umbenennungen haben immer Vorrang.

Type: boolean
Default: false

automation.autoNamingAgent

Welcher Agent für jede Sitzung automatische Namen erzeugt. „auto“ (Standard) benennt jede Sitzung mit ihrem eigenen Agenten; ein beliebiger Agent-Slug (claude, codex, grok, opencode, pi, omp, …) überschreibt die Benennung für alle Sitzungen, auch für die anderer Agenten. Nicht ansteuerbare oder nicht installierte Agenten greifen auf den eigenen Agenten der Sitzung zurück, sodass die Benennung nie fehlschlägt.

Type: string
Default: "auto"

automation.ripgrepBinaryPath

Custom path to the ripgrep (rg) binary used by project search.

Type: string
Default: ""

automation.suppressSubagentNotifications

Unterdrücke sichtbare Abschlussbenachrichtigungen und Statusänderungen von verschachtelten Codex- oder Claude-Unteragenten, während ihre Ereignisse in der Feed-Telemetrie bleiben.

Type: boolean
Default: true

automation.ampIntegration

Aktiviere cmux-Integrations-Hooks für Amp. Wenn deaktiviert, bleibt das gebündelte Plugin inaktiv, ohne entfernt werden zu müssen.

Type: boolean
Default: true

automation.cursorIntegration

Enable cmux integration hooks for Cursor.

Type: boolean
Default: true

automation.geminiIntegration

Enable cmux integration hooks for Gemini.

Type: boolean
Default: true

automation.kiroIntegration

Enable cmux integration hooks for Kiro CLI.

Type: boolean
Default: true

automation.kiroNotificationLevel

Controls how many Kiro tool events appear in Feed.

Type: string
Default: "standard"
Allowed values: minimal, standard, verbose

automation.portBase

Starting value for workspace CMUX_PORT assignments.

Type: integer
Default: 9100

automation.portRange

Number of ports reserved per workspace.

Type: integer
Default: 10

#`ui`

UI action wiring, including surface tab bar buttons and plus-button behavior. The plus-button context menu shows ui.newWorkspace.contextMenu (or the default items) followed by actions that opt in via newWorkspaceMenu.

ui.newWorkspace

New Workspace button behavior and context-menu wiring.

Type: object
Default: none

#`agentChat`

Agent Chat GUI server settings. The built-in New agent chat action opens this URL in a browser workspace, probes /healthz first, and can run a configured start command when the server is down.

agentChat.url

Base URL for the machine-local Agent Chat GUI server. cmux probes <url>/healthz before opening the workspace.

Type: string
Default: "http://127.0.0.1:7739"

agentChat.startCommand

Optional shell command to start the Agent Chat server when <url>/healthz is unreachable. cmux runs it detached with the user's SHELL, polls healthz for a short bounded window, then opens the workspace either way.

Type: string
Default: none

agentChat.keys

Keyboard behavior overrides for the Agent Chat web UI.

Type: object
Default: none

agentChat.fonts

Font overrides for the Agent Chat web UI. Omitted values fall back to Ghostty and built-in defaults.

Type: object
Default: none

#`browser`

Embedded browser settings from Settings > Browser.

browser.defaultSearchEngine

Standardsuchmaschine für Nicht-URL-Eingaben in der Browser-Adressleiste. Verwenden Sie custom mit customSearchEngineURLTemplate für beliebige Anbieter.

Type: string
Default: "google"
Allowed values: google, duckduckgo, bing, kagi, startpage, brave, perplexity, exa, yahoo, ecosia, qwant, mojeek, wikipedia, github, baidu, yandex, custom

browser.customSearchEngineName

Anzeigename, der verwendet wird, wenn defaultSearchEngine custom ist.

Type: string
Default: ""

browser.customSearchEngineURLTemplate

Such-URL, die verwendet wird, wenn defaultSearchEngine custom ist. Verwenden Sie den Abfrageplatzhalter oder %s für den kodierten Suchbegriff. Ohne Platzhalter fügt cmux q= zur URL hinzu.

Type: string
Default: "https://www.google.com/search?q={query}"

browser.showSearchSuggestions

Show omnibar search suggestions.

Type: boolean
Default: true

browser.theme

Embedded browser theme.

Type: string
Default: "system"
Allowed values: system, light, dark

browser.discardHiddenWebViews

Allow hidden browser tabs to release page memory and restore when shown again.

Type: boolean
Default: true

browser.hiddenWebViewDiscardDelaySeconds

Seconds a browser tab must stay hidden before cmux frees its page memory.

Type: number
Default: 300

browser.askWhereToSaveDownloads

Show a save panel for browser downloads instead of saving directly to Downloads.

Type: boolean
Default: false

browser.openTerminalLinksInCmuxBrowser

Open clicked terminal links in the embedded browser.

Type: boolean
Default: true

browser.interceptTerminalOpenCommandInCmuxBrowser

Intercept terminal open http(s) commands and route them through the embedded browser.

Type: boolean
Default: true

browser.hostsToOpenInEmbeddedBrowser

Allowlist of hosts that should stay inside the embedded browser.

Type: array<string>
Default: []

browser.urlsToAlwaysOpenExternally

Rules that always open matching URLs in the system browser.

Type: array<string>
Default: []

browser.insecureHttpHostsAllowedInEmbeddedBrowser

HTTP hosts allowed in the embedded browser without a warning prompt.

Type: array<string>
Default: [ "localhost", "*.localhost", "127.0.0.1", "::1", "0.0.0.0", "*.localtest.me" ]

browser.showImportHintOnBlankTabs

Show the browser import hint on blank tabs.

Type: boolean
Default: true

browser.reactGrabVersion

Pinned react-grab version for the browser toolbar helper.

Type: string
Default: "0.1.29"

#`markdown`

Built-in markdown viewer settings.

markdown.fontSize

Default body font size, in points, for newly opened markdown viewers. Zoom a viewer live with Cmd-+ / Cmd-- / Cmd-0.

Type: integer
Default: 15

markdown.fontFamily

Default body font family for newly opened markdown viewers. Leave empty for the system markdown font stack.

Type: string
Default: ""

markdown.maxWidth

Default maximum reading column width, in CSS pixels, for newly opened markdown viewers.

Type: integer
Default: 980

#`fileEditor`

Built-in plain-text file editor settings.

fileEditor.wordWrap

Wrap long lines at the editor's right edge instead of scrolling horizontally.

Type: boolean
Default: false

#`fileExplorer`

Einstellungen für den Datei-Explorer (Dateibaum) in der rechten Seitenleiste.

fileExplorer.doubleClickAction

Legt fest, was ein Doppelklick auf eine Datei im Dateiexplorer bewirkt (oder Return bei einem Suchergebnis). `preview` öffnet die integrierte cmux-Dateivorschau (Standard und bisheriges Verhalten). `defaultEditor` öffnet die Datei mit der macOS-Standard-App für diesen Dateityp. `preferredEditor` öffnet mit dem Befehl `app.preferredEditor` und fällt auf die Standard-App zurück, wenn keiner gesetzt ist. Gilt nur für Dateien; Verzeichnisse werden immer ein-/ausgeklappt, und nicht-lokale (Remote-)Dateiexplorer öffnen immer die cmux-Vorschau.

Type: string
Default: "preview"
Allowed values: preview, defaultEditor, preferredEditor

#`shortcuts`

Keyboard shortcut settings from Settings > Keyboard Shortcuts.

shortcuts.showModifierHoldHints

Zeigt Kurzbefehl-Hinweis-Chips an, während Cmd oder Control gedrückt gehalten wird.

Type: boolean
Default: true

shortcuts.when

Optionale Kontextprädikate pro Aktion (VS-Code-artige `when`-Klauseln), nach cmux-Aktions-ID indiziert. Jeder Wert ist ein boolescher Ausdruck über Kontextschlüssel, kombiniert mit !, &&, || und Klammern. Boolesche Schlüssel: sidebarFocus, browserFocus, markdownFocus, filePreviewTextEditorFocus, simulatorFocus, terminalFocus, commandPaletteVisible, terminalFindVisible, workspaceCanvasLayout. Typisierte Schlüssel unterstützen Vergleiche: die Zeichenkette sidebarMode (files, find, sessions, feed oder dock) sowie die Ganzzahlen paneCount und workspaceCount. Vergleichsoperatoren sind ==, !=, =~ (regulärer Ausdruck), <, <=, >, >= und `in [a, b]`; ein unbekannter oder fehlender Schlüssel gilt als false. Die booleschen Literale true und false werden ebenfalls akzeptiert; `key == false` entspricht `!key`. Der Kurzbefehl der Aktion wird nur ausgelöst (und kollidiert nur mit anderen Kurzbefehlen), wenn die Klausel erfüllt ist. Beispiele: { "selectWorkspaceByNumber": "!sidebarFocus" } wählt Workspaces mit Ctrl+1–9 überall aus, außer wenn die rechte Seitenleiste fokussiert ist; { "selectSurfaceByNumber": "sidebarMode == 'find' && paneCount > 1" } beschränkt eine Belegung auf die Suchen-Seitenleiste, wenn der Workspace mehrere Panes hat.

Type: object
Default: {}

#`shortcuts.bindings`

Use a string for a single shortcut, a two-item array for a chord, or null to unbind a shortcut in shortcuts.bindings. Unbind aliases also include empty string (""), none, clear, unbound, and disabled. Example chord: ["ctrl+b", "c"]. Numbered actions use 1 as the stored default and still match digits 1 through 9.

The defaults below are the same cmux-owned actions listed on the keyboard shortcuts page.

App

openSettings

Settings

Default file value

cmd+,

reloadConfiguration

Reload configuration

Default file value

cmd+shift+,

showHideAllWindows

Show/hide all cmux windowssystem-wide hotkey

Default file value

ctrl+opt+cmd+.

globalSearch

Global searchwhen cmux is active

Default file value

opt+cmd+f

commandPalette

Command palette

Default file value

cmd+shift+p

commandPaletteNext

Command palette next resultwhen the command palette is open

Default file value

ctrl+n

commandPalettePrevious

Command palette previous resultwhen the command palette is open

Default file value

ctrl+p

newWindow

New window

Default file value

cmd+shift+n

closeWindow

Close window

Default file value

ctrl+cmd+w

toggleFullScreen

Toggle full screen

Default file value

ctrl+cmd+f

sendFeedback

Send feedbackunbound by default

Default file value

reopenPreviousSession

Reopen previous session

Default file value

cmd+shift+o

quit

Quit cmux

Default file value

cmd+q

Workspaces

toggleSidebar

Toggle left sidebar

Default file value

cmd+b

toggleFileExplorer

Toggle right sidebar

Default file value

cmd+opt+b

newTab

New workspace

Default file value

cmd+n

newBrowserWorkspace

New browser workspacelike New Workspace, but the first surface is a browser pane with the address bar focused

Default file value

opt+cmd+n

saveLayoutTemplate

Save current workspace layout as a template

Default file value

ctrl+cmd+s

openFolder

Open folder

Default file value

cmd+o

goToWorkspace

Go to workspaceworkspace switcher

Default file value

cmd+p

nextSidebarTab

Next workspace

Default file value

ctrl+cmd+]

prevSidebarTab

Previous workspace

Default file value

ctrl+cmd+[

moveWorkspaceUp

Move workspace up

Default file value

ctrl+opt+cmd+[

moveWorkspaceDown

Move workspace down

Default file value

ctrl+opt+cmd+]

focusHistoryBack

Focus backFocus Back/Forward use Cmd+[ and Cmd+] outside browser panes; browser Back/Forward use the same defaults inside browser panes. Unbind Focus Back/Forward to let terminal shortcuts handle those keys.

Default file value

cmd+[

focusHistoryForward

Focus forwardFocus Back/Forward use Cmd+[ and Cmd+] outside browser panes; browser Back/Forward use the same defaults inside browser panes. Unbind Focus Back/Forward to let terminal shortcuts handle those keys.

Default file value

cmd+]

selectWorkspaceByNumber

Select workspace 1…9

Default file value

cmd+1

renameWorkspace

Rename workspace

Default file value

cmd+shift+r

editWorkspaceDescription

Edit workspace description

Default file value

opt+cmd+e

markWorkspaceDone

Mark workspace as done

Default file value

cmd+;

cycleWorkspaceStatus

Cycle workspace status one lane forward

Default file value

cmd+shift+;

toggleChecklistItemComplete

Toggle the highlighted checklist itemApplies in the focused todo pane or checklist popover.

Default file value

cmd+enter

newWorkspaceGroup

New empty workspace group

Default file value

ctrl+cmd+g

groupSelectedWorkspaces

Group selected workspaces

Default file value

cmd+shift+g

toggleFocusedWorkspaceGroupCollapsed

Collapse or expand focused workspace group

Default file value

ctrl+cmd+.

focusRightSidebar

Toggle right-sidebar focus

Default file value

cmd+shift+e

navigateRightSidebarRows

Navigate focused sidebar rowsIn Files, H/L collapse and expand folders. Search starts with /.

Default file value

j / k

fileExplorerOpenSelection

Ausgewählte Datei öffnen oder Ordner umschaltenfokussierter Datei-Explorer

Default file value

enter

fileExplorerOpenSelectionFinderAlias

Ausgewählte Datei öffnen oder Ordner umschaltenFinder-artiger Alias für den fokussierten Datei-Explorer

Default file value

cmd+down

closeWorkspace

Close workspace

Default file value

cmd+shift+w

reopenClosedWorkspace

Reopen closed workspaceunbound by default

Default file value

Oberflächen

newSurface

New surface

Default file value

cmd+t

nextSurface

Next surface

Default file value

cmd+shift+]

prevSurface

Previous surface

Default file value

cmd+shift+[

moveSurfaceLeft

Reorder surface left

Default file value

opt+cmd+shift+[

moveSurfaceRight

Reorder surface right

Default file value

opt+cmd+shift+]

moveSurfaceToPreviousPane

Move surface to previous pane

Default file value

ctrl+cmd+shift+[

moveSurfaceToNextPane

Move surface to next pane

Default file value

ctrl+cmd+shift+]

moveSurfaceToPaneLeft

Move surface to pane on left

Default file value

opt+cmd+shift+left

moveSurfaceToPaneRight

Move surface to pane on right

Default file value

opt+cmd+shift+right

moveSurfaceToPaneUp

Move surface to pane above

Default file value

opt+cmd+shift+up

moveSurfaceToPaneDown

Move surface to pane below

Default file value

opt+cmd+shift+down

selectSurfaceByNumber

Select surface 1…9

Default file value

ctrl+1

renameTab

Rename tab

Default file value

cmd+r

closeTab

Close tab

Default file value

cmd+w

closeOtherTabsInPane

Close other tabs in pane

Default file value

opt+cmd+t

reopenClosedBrowserPanel

Reopen last closed

Default file value

cmd+shift+t

toggleTerminalCopyMode

Toggle terminal copy mode

Default file value

cmd+shift+m

clearScreenKeepScrollback

Clear screen (keep scrollback)

Default file value

cmd+shift+k

simulatorHome

Simulator: Homefocused Simulator

Default file value

cmd+shift+h

simulatorRotateLeft

Simulator: rotate leftfocused Simulator

Default file value

cmd+left

simulatorRotateRight

Simulator: rotate rightfocused Simulator

Default file value

cmd+right

simulatorToggleAppearance

Simulator: toggle appearancefocused Simulator

Default file value

cmd+shift+a

simulatorToggleSoftwareKeyboard

Simulator: toggle software keyboardfocused Simulator

Default file value

cmd+k

focusTextBoxInput

Switch focus between terminal and TextBox input

Default file value

cmd+shift+a

cycleTextBoxSubmitAction

Cycle TextBox submit action

Default file value

shift+tab

attachTextBoxFile

Attach file to TextBox input

Default file value

opt+cmd+shift+a

sendCtrlFToTerminal

Send Ctrl-F to terminalunbound by default; forwards Ctrl-F to the focused terminal (Claude Code: invoke twice to force-stop hung background agents)

Default file value

saveFilePreview

Save file previewfocused text preview

Default file value

cmd+s

Geteilte Bereiche

focusLeft

Focus pane left

Default file value

opt+cmd+left

focusRight

Focus pane right

Default file value

opt+cmd+right

focusUp

Focus pane up

Default file value

opt+cmd+up

focusDown

Focus pane down

Default file value

opt+cmd+down

focusPreviousPane

Focus previous pane (cycle)unbound by default; a Ghostty goto_split:previous keybind also cycles panes while Focus Back does not claim the same keys

Default file value

focusNextPane

Focus next pane (cycle)unbound by default; a Ghostty goto_split:next keybind also cycles panes while Focus Forward does not claim the same keys

Default file value

splitRight

Split right

Default file value

cmd+d

splitDown

Split down

Default file value

cmd+shift+d

splitBrowserRight

Split browser right

Default file value

opt+cmd+d

splitBrowserDown

Split browser down

Default file value

opt+cmd+shift+d

toggleSplitZoom

Toggle pane zoom

Default file value

cmd+shift+enter

increaseWorkspaceTerminalFontSize

Increase font size for every terminal in the selected workspace

Default file value

ctrl+cmd+=

decreaseWorkspaceTerminalFontSize

Decrease font size for every terminal in the selected workspace

Default file value

ctrl+cmd+-

resetWorkspaceTerminalFontSize

Reset font size for every terminal in the selected workspace

Default file value

ctrl+cmd+0

equalizeSplits

Equalize split sizes

Default file value

ctrl+cmd+shift+=

Canvas

toggleCanvasLayout

Toggle canvas layout

Default file value

ctrl+cmd+c

canvasRevealFocusedPane

Reveal focused pane

Default file value

ctrl+cmd+r

canvasOverview

Toggle overview zoom

Default file value

ctrl+cmd+o

canvasZoomIn

Zoom in

Default file value

opt+cmd+=

canvasZoomOut

Zoom out

Default file value

opt+cmd+-

canvasZoomReset

Actual size

Default file value

cmd+0

canvasTidy

Tidy panes into a grid

Default file value

ctrl+cmd+t

Browser

openBrowser

Open browser

Default file value

cmd+shift+l

focusBrowserAddressBar

Focus address bar

Default file value

cmd+l

browserBack

Back

Default file value

cmd+[

browserForward

Forward

Default file value

cmd+]

browserReload

Reload pagefocused browser

Default file value

cmd+r

browserHardReload

Seite hart neu ladenfokussierter Browser

Default file value

cmd+shift+r

browserZoomIn

Zoom in

Default file value

cmd+=

browserZoomOut

Zoom out

Default file value

cmd+-

browserZoomReset

Actual size

Default file value

cmd+0

markdownZoomIn

Markdown viewer: zoom infocused markdown viewer

Default file value

cmd+=

markdownZoomOut

Markdown viewer: zoom outfocused markdown viewer

Default file value

cmd+-

markdownZoomReset

Markdown viewer: actual sizefocused markdown viewer

Default file value

cmd+0

toggleBrowserDeveloperTools

Toggle browser developer tools

Default file value

opt+cmd+i

showBrowserJavaScriptConsole

Show browser JavaScript console

Default file value

opt+cmd+c

toggleBrowserFocusMode

Enter browser focus modeGives the focused web page first claim on shortcuts. Press Esc twice to exit.

Default file value

opt+cmd+enter

toggleBrowserDesignMode

Toggle browser design modeSelect and visually edit elements in the focused browser

Default file value

ctrl+opt+cmd+d

toggleReactGrab

Toggle React Grabfocused browser, or the only browser pane when a terminal is focused

Default file value

cmd+shift+g

Diff-Viewer

openDiffViewer

Open diff viewer

Default file value

ctrl+cmd+shift+d

diffViewerScrollDown

Scroll viewer down one smooth stepfocused diff or Markdown viewer

Default file value

j

diffViewerScrollUp

Scroll viewer up one smooth stepfocused diff or Markdown viewer

Default file value

k

diffViewerScrollHalfPageDown

Scroll viewer down half a pagefocused diff or Markdown viewer

Default file value

ctrl+d

diffViewerScrollHalfPageUp

Scroll viewer up half a pagefocused diff or Markdown viewer

Default file value

ctrl+u

diffViewerScrollDownEmacs

Scroll viewer down one smooth step (Emacs)focused diff or Markdown viewer

Default file value

ctrl+n

diffViewerScrollUpEmacs

Scroll viewer up one smooth step (Emacs)focused diff or Markdown viewer

Default file value

ctrl+p

diffViewerScrollToBottom

Scroll diff to bottomfocused diff viewer

Default file value

shift+g

diffViewerScrollToTop

Scroll diff to topfocused diff viewer

Default file value

["g", "g"]

diffViewerOpenFileSearch

Open diff file searchfocused diff viewer

Default file value

/

diffViewerNextFile

Jump to next diff filefocused diff viewer

Default file value

["]", "f"]

diffViewerPreviousFile

Jump to previous diff filefocused diff viewer

Default file value

["[", "f"]]

Suche

find

Find

Default file value

cmd+f

findInDirectory

Find in directory

Default file value

cmd+shift+f

findNext

Find next

Default file value

cmd+g

findPrevious

Find previous

Default file value

opt+cmd+g

hideFind

Hide find bar

Default file value

opt+cmd+shift+f

useSelectionForFind

Use selection for find

Default file value

cmd+e

Benachrichtigungen

showNotifications

Show notifications

Default file value

cmd+i

jumpToUnread

Jump to latest unread

Default file value

cmd+shift+u

toggleUnread

Toggle current item unread state

Default file value

opt+cmd+u

markOldestUnreadAndJumpNext

Mark current item as oldest unread and jump to the next latest unread

Default file value

ctrl+cmd+u

triggerFlash

Flash focused panel

Default file value

cmd+shift+h

#`shortcuts.when`

Optionale Kontextprädikate pro Aktion (VS-Code-artige when-Klauseln), nach cmux-Aktions-ID indiziert. Eine Belegung wird nur ausgelöst — und kollidiert nur mit einer anderen Belegung auf demselben Tastendruck — wenn ihre Klausel erfüllt ist. Ohne Klausel behält die Aktion ihren eingebauten Kontext. Das Klausel-Vokabular:

sidebarFocus, browserFocus, markdownFocus, filePreviewTextEditorFocus, simulatorFocus, terminalFocus, commandPaletteVisible, terminalFindVisible, workspaceCanvasLayout — boolesche Schlüssel. Ein unbekannter oder fehlender Schlüssel gilt als false; die Literale true und false werden ebenfalls akzeptiert.
sidebarMode (files, find, sessions, feed, dock), paneCount, workspaceCount — typisierte Schlüssel für Vergleiche: der aktive Modus der rechten Seitenleiste (Zeichenkette) sowie Pane- und Workspace-Anzahl (Ganzzahlen).
!, &&, ||, (…), ==, !=, =~, <, <=, >, >=, in [a, b] — boolesche Operatoren, typisierte Vergleiche, Regex-Abgleich und Listenzugehörigkeit. Vergleiche binden stärker als && und ||.

Damit wählt Ctrl+1–9 zum Beispiel überall Workspaces aus, außer wenn die rechte Seitenleiste fokussiert ist (Ctrl+1–5 bleibt für den Modus-Umschalter der Seitenleiste frei), und die Surface-Auswahl ist auf die Suchen-Seitenleiste beschränkt, wenn der Workspace mehrere Panes hat:

"shortcuts": {
  "bindings": { "selectWorkspaceByNumber": "ctrl+1" },
  "when": {
    "selectWorkspaceByNumber": "!sidebarFocus",
    "selectSurfaceByNumber": "sidebarMode == 'find' && paneCount > 1"
  }
}

#Konfiguration

#Speicherorte der Konfigurationsdatei

#Beispielkonfiguration

#cmux.json

#Schema reference

#Metadata

#app

#terminal

#notifications

#sidebar

#workspaceGroups

#workspaceColors

#sidebarAppearance

#automation

#ui

#agentChat

#browser

#markdown

#fileEditor

#fileExplorer

#shortcuts

#shortcuts.bindings

App

Workspaces

Oberflächen

Geteilte Bereiche

Canvas

Browser

Diff-Viewer

Suche

Benachrichtigungen

#shortcuts.when

#`app`

#`terminal`

#`notifications`

#`sidebar`

#`workspaceGroups`

#`workspaceColors`

#`sidebarAppearance`

#`automation`

#`ui`

#`agentChat`

#`browser`

#`markdown`

#`fileEditor`

#`fileExplorer`

#`shortcuts`

#`shortcuts.bindings`

#`shortcuts.when`