Customize and Admin

Configuration

cmux reads terminal configuration from Ghostty config files. cmux-owned app settings also live in ~/.config/cmux/cmux.json, including shortcuts, automation, sidebar behavior, notifications, and browser preferences.

Config file locations

cmux looks for configuration in these locations (in order):

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

Create the config file if it doesn't exist:

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

Example config

~/.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}",
  //   "paneResizeStepPixels": 20,
  //   "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": {
  //   // Double-click a file: preview (default), defaultEditor (macOS default app), or preferredEditor (the app.preferredEditor command).
  //   "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",
  //     "toggleFileEditorWordWrap": "opt+z",
  //     "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.accentColor

Accent for cmux-drawn chrome: the selected workspace, attention ring and pane flash, agent status, pane swap, canvas focus, and scroll markers. "cmux" uses cmux blue; "system" follows the macOS accent color and updates when it changes; a "#RRGGBB" hex uses that color in light and dark mode. workspaceColors.selectionColor and notifications.paneFlashColor still override their parts. Native controls always use the macOS accent.

Type: string | unknown
Default: "cmux"

app.appIcon

Dock and app switcher icon style.

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

app.windowTitleTemplate

Optional NSWindow title template. Blank preserves cmux's existing default title behavior, including the current-directory fallback. Supported placeholders: {windowId}, {windowToken}, {activeWorkspace}, {activeDirectory}, {defaultTitle}, {appName}.

Type: string
Default: ""

app.devWindowDisplay

DEBUG-only display name used when opening new windows. An empty value uses the system default.

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.goToWorkspaceOrder

Order used by Go to Workspace (Cmd-P): sidebar order, or most recently focused workspaces.

Type: string
Default: "sidebar"
Allowed values: sidebar, recent

app.forkConversationDefaultDestination

Default destination for the tab context menu's primary Fork Conversation action. The submenu still exposes every destination.

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: false

app.paneResizeStepPixels

Pixels moved per keypress when using pane-resize shortcuts. Accepts 1–200; defaults to 20. Changes apply immediately.

Type: integer
Default: 20

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.equalizeSplitsOnCreate

When true, creating a split resizes the panes in that split's row or column to equal sizes. When false, a new split halves the pane it was created from.

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.defaultWorkspacePath

Folder the Open Folder panel starts in, for example ~/code. Supports a leading ~. Leave empty to start in the active workspace's directory.

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

Percentage zoom for everything cmux draws itself: terminal text, tab titles, sidebars, Settings, overlays, and window chrome. Web pages inside browser surfaces keep their own size.

Type: integer
Default: 100

app.reorderOnNotification

Automatic workspace reordering. true or "notifications" moves workspaces with new notifications toward the top. "agentActivity" also moves them when a prompt is sent or an agent finishes a turn, needs input, or fails, at most once per burst and never while the pointer is over the sidebar. false or "off" keeps the order stable.

Type: boolean | string
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

Control when cmux asks for confirmation before quitting. DEV builds always quit immediately regardless of this setting. Legacy app.warnBeforeQuit is still accepted as a boolean fallback.

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

app.warnBeforeQuit

Legacy boolean fallback for quit confirmation. Use app.confirmQuit for new configs.

Type: boolean
Default: true

app.warnBeforeClosingTab

Show a confirmation before closing a tab.

Type: boolean
Default: true

app.warnBeforeClosingAgentSession

Show a confirmation before closing an agent session while it is mid-turn.

Type: boolean
Default: true

app.warnBeforeClosingTabXButton

Show a confirmation before closing a tab with the tab close button.

Type: boolean
Default: false

app.warnBeforeClosingWorkspace

Show a confirmation before closing a workspace with a running process, or several workspaces at once. Pinned workspaces still ask when this is off.

Type: boolean
Default: true

app.warnBeforeClosingWindow

Show a confirmation before closing a window with a running process, or all of a window's workspaces at once.

Type: boolean
Default: true

app.hideTabCloseButton

Hide tab close buttons in the pane tab bar.

Type: boolean
Default: false

app.tabBarVisibility

Decide when a pane draws its tab bar. "always" draws it even for a pane holding one tab; "multiple-tabs" hides it while a pane holds one tab and draws it once a second tab opens. Minimal mode (app.minimalMode) always draws it, because there the top pane's tab bar doubles as the window titlebar.

Type: string
Default: "always"
Allowed values: always, multiple-tabs

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.adaptiveDefaultTheme

When true (the default), cmux supplies an appearance-adaptive default palette unless a Ghostty theme or terminal colors are configured. Font and other settings are preserved. When false, Ghostty uses its fixed built-in palette. Explicit themes and colors always take precedence, including theme = light:X,dark:Y.

Type: boolean
Default: true

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

Scales how far the terminal moves for each mouse-wheel or trackpad scroll event. Values above 1 speed scrolling up and values below 1 slow it down.

Type: number
Default: 1

terminal.sessionContentMaxWidth

Optional maximum width, in points, for terminal and built-in agent chat content. Set false to use the full pane width.

Type: boolean | number
Default: false

terminal.sessionContentAlignment

Horizontal placement for terminal and built-in agent chat content when sessionContentMaxWidth is enabled.

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

terminal.copyOnSelect

When true, copy selected terminal text to the system clipboard when the selection is committed. When false, cmux does not emit a Ghostty copy-on-select override; Ghostty config and defaults control selection-clipboard behavior.

Type: boolean
Default: false

terminal.showCopyConfirmation

Briefly show "Copied to clipboard" at the bottom of a terminal after selecting text copies it. Applies whether copyOnSelect or Ghostty's copy-on-select turned copying on. Copies made with a keyboard shortcut or by a program (OSC 52) never show it.

Type: boolean
Default: false

terminal.reflowHardWrapOnCopy

When true, copying terminal text also joins a line that exactly fills the terminal width onto the next line, undoing hard wraps a program inserted at the grid edge. Soft-wrapped rows are always joined.

Type: boolean
Default: false

terminal.confirmUnsafePaste

When true, a paste that Ghostty's clipboard-paste-protection flags as unsafe (for example, text with a line break going to a program that has not enabled bracketed paste) waits for confirmation in a sheet attached to the terminal's window. When false, cmux pastes it without asking. OSC 52 clipboard reads are not affected.

Type: boolean
Default: false

terminal.textEditingGestures

Replay macOS text-editing gestures as line-editor keys at the shell prompt: Command and Option arrow keys move by line and word, and Command and Option Delete kill by line and word. While a full-screen application (vim, less, htop, tmux) has the terminal on the alternate screen, it gets the keys as if gestures were off, unless textEditingGesturesInFullScreenApps is on. Ghostty's own bindings still apply there, so Command+Left sends Ctrl+A and Option+Left sends Esc b.

Type: boolean
Default: false

terminal.textEditingCommandMovesByWord

With textEditingGestures on, switch to a browser-style layout: Command arrow and Delete keys move and delete by word, like Option, and Control+Left/Right move to the start and end of the line. Every other Control chord, including Ctrl+W and Ctrl+C, still reaches the terminal. macOS reserves Control+Left/Right for switching Spaces by default; turn those off in System Settings > Keyboard > Keyboard Shortcuts > Mission Control for Control+arrows to reach cmux.

Type: boolean
Default: false

terminal.textEditingGesturesInFullScreenApps

Keep textEditingGestures active while a full-screen application has the terminal on the alternate screen. tmux, screen, and zellij keep the outer terminal on the alternate screen even at their shell prompt, so turn this on to use gestures inside a multiplexer. Applications that bind the gesture chords themselves then receive the translated keys.

Type: boolean
Default: false

terminal.showPasswordInputIndicator

Show a lock badge in the terminal corner while the foreground program has turned echo off for a password prompt (sudo, ssh, passwd, gpg). cmux draws the badge itself and never changes terminal text. Only prompts on the local terminal are detected: an ssh password prompt counts, but sudo run inside an ssh session does not. Changes apply to an open prompt at once.

Type: boolean
Default: true

terminal.showPasswordInputDots

When the password input badge is shown, also draw one dot per typed character. cmux keeps only a count, never the typed characters. Backspace removes a dot; Enter or echo turning back on clears them. Pasted text is not counted.

Type: boolean
Default: false

terminal.showJumpToBottomButton

Removed. cmux no longer shows a Jump to Bottom button in terminal panes, and ignores this key. It stays in the schema so existing configs still validate.

Type: boolean
Default: none

terminal.predictiveLocalEcho

Draw typed characters immediately in a terminal whose shell runs on another machine (cmux ssh, Cloud, remote tmux) when the link is slow, underlined until the remote echo confirms them, and withdraw them if the remote disagrees. Local terminals, password prompts and full-screen apps are excluded.

Type: boolean
Default: true

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

Show the TextBox input by default for newly created workspaces, terminal tabs, and terminal splits.

Type: boolean
Default: false

terminal.focusTextBoxOnNewTerminals

Focus the TextBox input by default for newly created workspaces, terminal tabs, and terminal splits. Focusing also shows the TextBox.

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, under memory pressure (critical pressure from macOS or from the cmux app's own footprint, or cmux's total memory use past its aggregate warning threshold) cmux may hibernate every safe idle background agent 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.titleUpdates

Terminal title update throttling and diagnostics.

Type: object
Default: none

terminal.runawayMemoryGuardrail

Per-pane process-tree memory monitoring.

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.paneFlashDoubleBlink

Blink the pane flash twice instead of one short pulse.

Type: boolean
Default: true

notifications.paneFlashOnTyping

Flash the pane when terminal typing dismisses its notification.

Type: boolean
Default: true

notifications.paneFlashThemeColor

Use the terminal theme foreground for flashes when paneFlashColor is unset. Unread rings remain cmux blue.

Type: boolean
Default: false

notifications.paneFlashColor

Override the pane flash and unread notification ring color. Leave unset to use the accent from app.accentColor.

Type: unknown
Default: null

notifications.soundWhenFocused

Play the notification sound even when the pane that notified is already focused. Off by default, so a focused pane shows only its ring and flash.

Type: boolean
Default: false

notifications.suppressOnlyFocusedSurface

When enabled, a notification banner is auto-withdrawn only when its surface is the exact focused surface. A banner delivered for a non-focused surface in the currently visible workspace stays up until you focus that surface (or click/dismiss it), instead of being retracted when the workspace becomes visible. Off preserves the legacy workspace-visibility withdraw.

Type: boolean
Default: false

notifications.suppressWhenAppFocused

When enabled, cmux skips the desktop banner for every notification while cmux is the active app, not only for the focused pane. Notifications still appear in the sidebar, the sound and custom command still run, and phone forwarding is unchanged. Off keeps showing banners for other workspaces and panes while cmux is focused.

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.soundOverrides

Sparse per-agent and per-alert-type notification sound overrides. Missing cells use notifications.sound.

Type: object
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.fontSize

Sidebar font size in points. The legacy Ghostty key sidebar-font-size remains a fallback alias.

Type: number
Default: 12.5

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.workspaceDescriptionColor

Override the workspace description text color in the sidebar.

Type: unknown
Default: null

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.branchVerticalLayout

Show git branch details stacked vertically when true, or inline when false. This boolean form is the canonical setting; branchLayout remains supported as a legacy alias.

Type: boolean
Default: true

sidebar.stackBranchDirectory

Render the git branch and working directory on separate lines instead of sharing one line.

Type: boolean
Default: false

sidebar.pathLastSegmentOnly

Truncate sidebar paths from the start, showing as much of the trailing path as fits with a leading …/. When false, full paths are abbreviated with ~/.

Type: boolean
Default: false

sidebar.showNotificationMessage

Show the latest notification text in the sidebar.

Type: boolean
Default: true

sidebar.notificationMessageLineLimit

Maximum lines shown for the latest notification below each workspace title.

Type: integer
Default: 12

sidebar.showBranchDirectory

Show the workspace working directory.

Type: boolean
Default: true

sidebar.showCloudDeviceIcons

Show Cloud machine and device icons beside remote workspace titles independently of Git branch and directory details.

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.showAgentUsage

Append coding-agent usage to the Claude Code or Codex status entry: model and context window used, plus for Claude Code an estimated API cost (main thread and subagents) at published Anthropic list prices. The cost is an estimate, not your subscription bill; batch/priority tiers, partner pricing, fast mode and server-tool fees are not modelled.

Type: boolean
Default: false

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.compactAgentStatus

Show each workspace on one line: one colored icon before the title for agent, unread, and pull request state replaces the agent status rows (for example Running or Needs input), the branch and directory line, and the pull request rows, whose details move to the icon's tooltip. Other status entries keep their rows.

Type: boolean
Default: false

sidebar.compactStatusIcons

SF Symbol names that replace the compactAgentStatus glyph for each state, for example {"terminal": "apple.terminal", "needsInput": "hand.raised.fill"}. Unset states keep the built-in symbol, and a name that does not render falls back to it.

Type: object
Default: {}

sidebar.activeTabIndicatorStyle

Active workspace indicator style in the sidebar.

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

sidebar.selectionColor

Override the selected workspace background color in the sidebar.

Type: unknown
Default: null

sidebar.notificationBadgeColor

Override the unread notification badge color in the sidebar.

Type: unknown
Default: null

sidebar.rightMaxWidth

Maximum width in points for the right sidebar. When omitted, the built-in dynamic cap applies.

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

Global default for where Cmd-N inside a group, the group header + button, and configured group actions place the new workspace: `afterCurrent` (after the active in-group workspace, falling back to top), `top` (second slot, just after the anchor), or `end` (after the last member).

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.subtleSelection

Show the selected workspace as a faint accent tint with a thin edge instead of a solid fill. A custom selectionColor still uses a solid fill.

Type: boolean
Default: false

workspaceColors.brightenInDarkMode

Lighten workspace colors in dark mode so they stay readable on a dark sidebar. false shows colors exactly as chosen. Applies to the solidFill indicator; leftRail always lightens its rail.

Type: boolean
Default: true

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: true

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: 0.18

`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.codexIntegration

Enable cmux integration hooks for Codex. When disabled, cmux no longer wraps the codex command but still tracks live Codex sessions it can observe.

Type: boolean
Default: true

automation.canonicalAgentScratch

Use a cmux-owned scratch directory for native agent panels, organized per session.

Type: boolean
Default: false

automation.piIntegration

Enable cmux integration hooks for Pi.

Type: boolean
Default: true

automation.claudeBinaryPath

Custom path to the claude binary.

Type: string
Default: ""

automation.workspaceAutoNaming

Opt-in AI auto-naming of workspaces and tabs from agent conversation content. When enabled, cmux summarizes supported agent sessions into short titles using each agent's own binary; manual renames always win.

Type: boolean
Default: false

automation.autoNamingAgent

Which agent generates auto-names for every session. "auto" (default) names each session with its own agent; any agent slug (claude, codex, grok, opencode, pi, omp, …) overrides naming for all sessions, even other agents' sessions. Undriveable or uninstalled agents fall back to the session's own agent, so naming never breaks.

Type: string
Default: "auto"

automation.ripgrepBinaryPath

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

Type: string
Default: ""

automation.suppressSubagentNotifications

Suppress visible completion notifications and status mutations from nested Codex or Claude child agents while keeping their events in Feed telemetry.

Type: boolean
Default: true

automation.agentAutoResume

Send `continue` to a cmux-launched agent whose turn ended on a retryable upstream error (model at capacity, overloaded, or connection lost), with backoff. Turns waiting on a human are never resumed.

Type: boolean
Default: true

automation.ampIntegration

Turns the cmux hooks for Amp on or off. Turning them off leaves the bundled plugin installed but idle.

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

Default search engine for non-URL browser address bar queries. Use custom with customSearchEngineURLTemplate for arbitrary providers.

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

Display name used when defaultSearchEngine is custom.

Type: string
Default: ""

browser.customSearchEngineURLTemplate

Search URL used when defaultSearchEngine is custom. Include the query placeholder or %s for the encoded query. If omitted, cmux appends q= to the URL.

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.defaultZoomLevel

Default page zoom factor applied to newly opened browser pages (1 = 100%). Zoom In, Zoom Out, and Actual Size still adjust each page.

Type: number
Default: 1

browser.discardHiddenWebViews

Allow hidden browser tabs to release page memory. Scroll position, supported form input, and history are restored when recoverable.

Type: boolean
Default: true

browser.hiddenWebViewDiscardMode

How cmux picks hidden browser tabs to free. budget frees the tabs hidden longest once hidden tabs use more than hiddenWebViewMemoryBudgetMB; timer frees every tab hidden longer than hiddenWebViewDiscardDelaySeconds.

Type: string
Default: "budget"
Allowed values: budget, timer

browser.hiddenWebViewMemoryBudgetMB

Megabytes of memory hidden browser tabs may use before cmux frees the tabs hidden longest. Applies when hiddenWebViewDiscardMode is budget.

Type: integer
Default: 2048

browser.hiddenWebViewDiscardDelaySeconds

Seconds a browser tab must stay hidden before cmux may free its page memory. In timer mode, every tab hidden this long is freed.

Type: number
Default: 300

browser.autoRestoreUnloadedPages

Restore a browser page unloaded to save memory, or whose web process ended while hidden, as soon as its tab is shown. When false, the tab shows the page's last snapshot until you click Restore.

Type: boolean
Default: true

browser.askWhereToSaveDownloads

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

Type: boolean
Default: false

browser.showLinkHoverURL

Show a link's destination at the bottom-left of a browser pane while the pointer is over the link or the link has keyboard focus.

Type: boolean
Default: true

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.urlAllowlist

Host or URL patterns that restrict embedded-browser navigation. The Settings UI suggests local development origins; saving a list opts into the optional restriction. Remove entries to block them, or leave the user value empty to disable it when no managed policy applies.

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 file editor settings.

fileEditor.wordWrap

Soft-wrap lines longer than the editor is wide, so no horizontal scrolling is needed.

Type: boolean
Default: false

fileEditor.syntaxHighlighting

Apply language-aware coloring to code opened in the built-in file editor.

Type: boolean
Default: true

fileEditor.lineNumbers

Number each line in a column beside the text of the built-in file editor.

Type: boolean
Default: true

fileEditor.indentGuides

Mark each indentation level with a thin vertical line in the built-in file editor.

Type: boolean
Default: true

fileEditor.currentLineHighlight

Tint the row that holds the caret while nothing is selected.

Type: boolean
Default: true

fileEditor.tabWidth

How many columns one tab stop spans. Indent guides use the same spacing.

Type: integer
Default: 4

`fileExplorer`

Right-sidebar file explorer (file tree) settings.

fileExplorer.doubleClickAction

What double-clicking (or pressing Return on a search result for) a file in the file explorer does. `preview` opens the built-in cmux file preview (the default and historical behavior). `defaultEditor` opens with the macOS default app for the file type. `preferredEditor` opens with the `app.preferredEditor` command, falling back to the default app when none is set. Only applies to files; directories always expand/collapse, and non-local (remote) file explorers always open the cmux preview.

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

`shortcuts`

Keyboard shortcut settings from Settings > Keyboard Shortcuts.

shortcuts.showModifierHoldHints

Show shortcut-hint chips while holding Cmd or Control.

Type: boolean
Default: true

shortcuts.when

Optional per-action context predicates (VS Code-style `when` clauses), keyed by cmux action id. Each value is a boolean expression over context keys combined with !, &&, ||, and parentheses. Boolean keys: sidebarFocus, browserFocus, markdownFocus, filePreviewTextEditorFocus, simulatorFocus, terminalFocus, commandPaletteVisible, terminalFindVisible, terminalAlternateScreen, workspaceCanvasLayout. Typed keys support comparisons: the string sidebarMode (files, find, sessions, feed, or dock) and the integers paneCount and workspaceCount. Comparison operators are ==, !=, =~ (regex), <, <=, >, >=, and `in [a, b]`; an unknown or absent key reads as false. The boolean literals true and false are also accepted; `key == false` is the same as `!key`. The action's shortcut only fires (and only conflicts with other shortcuts) when the clause holds. Examples: { "selectWorkspaceByNumber": "!sidebarFocus" } selects workspaces with Ctrl+1–9 everywhere except when the right sidebar is focused; { "selectSurfaceByNumber": "sidebarMode == 'find' && paneCount > 1" } scopes a binding to the Find sidebar when the workspace has multiple panes.

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+,

openTeamPicker

Open team picker

Default file value

opt+shift+cmd+t

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

agentInbox

Show agent inbox

Default file value

cmd+shift+i

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 local workspace

Default file value

cmd+n

newLocalWorkspace

New local workspaceopens a local workspace while a remote tmux mirror workspace is active, where New Workspace would start a session on that workspace's host instead

Default file value

ctrl+opt+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

newCloudWorkspace

New cloud workspaceuses the most recently selected Cloud workspace's machine, then the first machine in the right-hand sidebar; if no usable machine exists, it opens New Cloud Machine

Default file value

cmd+y

newCloudMachine

New cloud machine

Default file value

shift+cmd+y

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+[

nextSidebarTabInGroup

Next workspace in groupunbound by default; skips the group anchor and uses window-wide cycling when ungrouped

Default file value

prevSidebarTabInGroup

Previous workspace in groupunbound by default; skips the group anchor and uses window-wide cycling when ungrouped

Default file value

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+]

focusHistoryLast

Focus lastunbound by default; toggles between the current position and the one focus last left, so pressing it twice returns where you started

Default file value

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+.

focusSidebar

Focus the workspace sidebar↑/↓ select workspaces; Return or Esc returns to the terminal

Default file value

ctrl+cmd+e

showWindowHints

Click by hint: label the window's controlsType a label to click it, Shift+label to right-click; Esc cancels. Preview feature, off by default: turn on Click by Hint in Settings > Beta Features or from the command palette

Default file value

cmd+j

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

Open selected file or toggle folderfocused file explorer

Default file value

enter

fileExplorerOpenSelectionFinderAlias

Open selected file or toggle folderFinder-style alias for the focused file explorer

Default file value

cmd+down

closeWorkspace

Close workspace

Default file value

cmd+shift+w

reopenClosedWorkspace

Reopen closed workspaceunbound by default

Default file value

Surfaces

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

sizeTerminalToMyWindow

Size shared terminal to my windowwhen a terminal is shared with phones or other clients, makes this Mac's window set its grid

Default file value

ctrl+opt+cmd+=

pasteLastScreenshot

Paste last screenshotunbound by default; inserts the path of the newest screenshot in the macOS screenshot folder (Desktop unless changed) into the focused terminal, uploading it first in remote workspaces

Default file value

saveFilePreview

Save file previewfocused text preview

Default file value

cmd+s

toggleFileEditorWordWrap

Toggle File Editor Word Wrapfocused file editor

Default file value

opt+z

Split Panes

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

focusPaneByNumber

Focus pane 1…9

Default file value

ctrl+cmd+1

splitRight

Split right

Default file value

cmd+d

splitDown

Split down

Default file value

cmd+shift+d

newPaneAutoLayout

New pane (auto layout)retiles all panes like Zellij and cmux-tui Alt-n: the right column fills to four panes before a new column opens

Default file value

ctrl+cmd+n

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+=

resize-pane-left

Resize pane left

Default file value

ctrl+shift+h

resize-pane-right

Resize pane right

Default file value

ctrl+shift+l

resize-pane-up

Resize pane up

Default file value

ctrl+shift+k

resize-pane-down

Resize pane down

Default file value

ctrl+shift+j

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

Hard refresh pagefocused 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"]]

diffViewerNextHunk

Jump to next hunkfocused diff viewer

Default file value

"n"

diffViewerPreviousHunk

Jump to previous hunkfocused diff viewer

Default file value

"p"

diffViewerToggleViewed

Toggle viewed on the current filefocused diff viewer

Default file value

"v"

Find

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

Notifications

showNotifications

Show notifications

Default file value

cmd+i

jumpToUnread

Jump to latest unread

Default file value

cmd+shift+u

jumpToLastPrompt

Jump to the surface where you last sent an agent prompt

Default file value

cmd+shift+b

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

markAllNotificationsRead

Mark all notifications readunbound by default

Default file value

clearAllNotifications

Clear all notificationsunbound by default

Default file value

triggerFlash

Flash focused panel

Default file value

cmd+shift+h

`shortcuts.when`

Optional per-action context predicates (VS Code-style when clauses), keyed by cmux action id. A binding only fires — and only conflicts with another binding on the same keystroke — when its clause holds. Omit a clause to keep the action's built-in context. The clause vocabulary:

sidebarFocus, browserFocus, markdownFocus, filePreviewTextEditorFocus, simulatorFocus, terminalFocus, commandPaletteVisible, terminalFindVisible, terminalAlternateScreen, workspaceCanvasLayout — boolean keys. An unknown or absent key reads as false; the literals true and false are also accepted.
sidebarMode (files, find, sessions, feed, dock), paneCount, workspaceCount — typed keys for comparisons: the right sidebar's active mode (a string) plus pane and workspace counts (integers).
!, &&, ||, (…), ==, !=, =~, <, <=, >, >=, in [a, b] — boolean operators, typed comparisons, regex match, and list membership. Comparisons bind tighter than && and ||.

For example, this makes Ctrl+1–9 select workspaces everywhere except when the right sidebar is focused (leaving the Ctrl+digit tab shortcuts free for the sidebar's mode switcher), and scopes surface selection to the Find sidebar when the workspace has multiple panes:

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

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