cmuxcmux
/docs

#Konfiguration

cmux læser konfiguration fra Ghostty-konfigurationsfiler, hvilket giver dig velkendte muligheder hvis du kommer fra Ghostty.

#Konfigurationsfilplaceringer

cmux leder efter konfiguration på disse placeringer (i rækkefølge):

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

Opret konfigurationsfilen hvis den ikke findes:

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

#Eksempelkonfiguration

~/.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.

  1. ~/.config/cmux/cmux.json
  2. .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": {
  //   // Dobbeltklik på en fil: preview (standard), defaultEditor (macOS-standardapp) eller preferredEditor (kommandoen app.preferredEditor).
  //   "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

Valgfri skabelon for NSWindow-titlen. Tom bevarer cmux' eksisterende standardtiteladfærd, inklusive fallback til den aktuelle mappe. Understøttede pladsholdere: {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

Standarddestinationen for fanens primære Fork Conversation-handling i genvejsmenuen. Undermenuen viser stadig alle destinationer.

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

Skalerer cmux-ejede terminaler, fanetitler, sidepaneler, indstillinger, overlejringer og app-chrome med denne procent. Renderet browserindhold er ikke inkluderet.

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

Styrer hvornår cmux beder om bekræftelse før afslutning. DEV-builds afsluttes altid straks uanset denne indstilling. Den ældre app.warnBeforeQuit accepteres stadig som boolesk fallback.

Type
string
Default
"always"
Allowed values
always, dirty-only, never
app.warnBeforeQuit

Ældre boolesk fallback til afslutningsbekræftelse. Brug app.confirmQuit til nye konfigurationer.

Type
boolean
Default
true
app.warnBeforeClosingTab

Show a confirmation before closing a tab.

Type
boolean
Default
true
app.warnBeforeClosingTabXButton

Vis en bekræftelse, før en fane lukkes med fanens luk-knap.

Type
boolean
Default
false
app.hideTabCloseButton

Skjul fanernes luk-knapper i rudens fanelinje.

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 anvendt på rulleværdier fra musehjul og pegefelt i terminalen. Højere værdier ruller hurtigere, lavere værdier langsommere.

Type
number
Default
1
terminal.sessionContentMaxWidth

Valgfri maksimal bredde i punkter for terminalindhold og den indbyggede agentchat. Angiv false for at bruge hele rudens bredde.

Type
boolean | number
Default
false
terminal.sessionContentAlignment

Vandret placering af terminalindhold og den indbyggede agentchat, når sessionContentMaxWidth er aktiveret.

Type
string
Default
"center"
Allowed values
left, center, right
terminal.copyOnSelect

Når værdien er true, kopieres markeret terminaltekst til systemets udklipsholder, når markeringen bekræftes. Når værdien er false, udsender cmux ikke en Ghostty copy-on-select-tilsidesættelse; Ghostty-konfiguration og standarder styrer markeringsudklipsholderens adfærd.

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

Viser beta-TextBox-input som standard for nyoprettede arbejdsområder, terminalfaner og terminalsplits.

Type
boolean
Default
false
terminal.focusTextBoxOnNewTerminals

Fokuserer beta-TextBox-input som standard for nyoprettede arbejdsområder, terminalfaner og terminalsplits. Fokus viser også 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, 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

Når dette er slået til, trækkes et notifikationsbanner kun automatisk tilbage, når dets surface er præcis den fokuserede surface. Et banner leveret til en ikke-fokuseret surface i det aktuelt synlige workspace bliver vist, indtil du fokuserer på den surface (eller klikker/afviser det), i stedet for at blive trukket tilbage, når workspacet bliver synligt. Fra bevarer den ældre tilbagetrækning baseret på workspace-synlighed.

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

Det maksimale antal linjer, der vises for den seneste notifikation under hver arbejdsområdetitel.

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

Maksimal bredde i punkter for højre sidepanel. Hvis den udelades, bruges den indbyggede dynamiske grænse.

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 standard for hvor Cmd-N i en gruppe, gruppehovedets + knap og konfigurerede gruppehandlinger placerer det nye workspace: `afterCurrent` (efter det aktive workspace i gruppen, med top som fallback), `top` (anden plads, lige efter ankeret) eller `end` (efter det sidste medlem).

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

Valgfri AI-baseret automatisk navngivning af arbejdsområder og faner ud fra agentens samtaleindhold. Når den er aktiveret, opsummerer cmux understøttede agentsessioner til korte titler med hver agents egen binær; manuelle omdøbninger vinder altid.

Type
boolean
Default
false
automation.autoNamingAgent

Hvilken agent der genererer automatiske navne for hver session. "auto" (standard) navngiver hver session med dens egen agent; et hvilket som helst agent-slug (claude, codex, grok, opencode, pi, omp, …) tilsidesætter navngivningen for alle sessioner, også andre agenters. Agenter, der ikke kan styres eller ikke er installeret, falder tilbage til sessionens egen agent, så navngivningen aldrig fejler.

Type
string
Default
"auto"
automation.ripgrepBinaryPath

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

Type
string
Default
""
automation.suppressSubagentNotifications

Skjul synlige fuldførelsesnotifikationer og statusændringer fra indlejrede Codex- eller Claude-underagenter, mens deres hændelser bevares i Feed-telemetri.

Type
boolean
Default
true
automation.ampIntegration

Aktivér cmux-integrationskroge for Amp. Når deaktiveret, forbliver det medfølgende plugin inaktivt uden at skulle fjernes.

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

Standardsøgemaskine for forespørgsler i browserens adresselinje, der ikke er URLer. Brug custom med customSearchEngineURLTemplate til andre udbydere.

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

Visningsnavn brugt når defaultSearchEngine er custom.

Type
string
Default
""
browser.customSearchEngineURLTemplate

Søge-URL brugt når defaultSearchEngine er custom. Medtag forespørgselspladsholderen eller %s for den kodede søgning. Uden en pladsholder tilføjer cmux q= til URLen.

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

Indstillinger for filoversigten (filtræet) i højre sidepanel.

fileExplorer.doubleClickAction

Bestemmer, hvad der sker, når du dobbeltklikker (eller trykker Return på et søgeresultat for) en fil i filoversigten. `preview` åbner den indbyggede cmux-filvisning (standard og historisk adfærd). `defaultEditor` åbner med macOS-standardappen for filtypen. `preferredEditor` åbner med kommandoen `app.preferredEditor` og falder tilbage til standardappen, når den ikke er sat. Gælder kun filer; mapper udvides/skjules altid, og ikke-lokale (eksterne) filoversigter åbner altid cmux-forhåndsvisningen.

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

#shortcuts

Keyboard shortcut settings from Settings > Keyboard Shortcuts.

shortcuts.showModifierHoldHints

Vis genvejstipchips, mens Cmd eller Control holdes nede.

Type
boolean
Default
true
shortcuts.when

Valgfri kontekstprædikater pr. handling (VS Code-lignende `when`-klausuler), nøgleindekseret efter cmux-handlings-id. Hver værdi er et boolesk udtryk over kontekstnøgler, kombineret med !, &&, || og parenteser. Boolske nøgler: sidebarFocus, browserFocus, markdownFocus, filePreviewTextEditorFocus, simulatorFocus, terminalFocus, commandPaletteVisible, terminalFindVisible, workspaceCanvasLayout. Typede nøgler understøtter sammenligninger: strengen sidebarMode (files, find, sessions, feed eller dock) og heltallene paneCount og workspaceCount. Sammenligningsoperatorerne er ==, !=, =~ (regulært udtryk), <, <=, >, >= og `in [a, b]`; en ukendt eller manglende nøgle læses som false. De boolske litteraler true og false accepteres også; `key == false` svarer til `!key`. Handlingens genvej udløses kun (og konflikter kun med andre genveje), når klausulen er sand. Eksempler: { "selectWorkspaceByNumber": "!sidebarFocus" } vælger workspaces med Ctrl+1–9 overalt undtagen når højre sidebjælke har fokus; { "selectSurfaceByNumber": "sidebarMode == 'find' && paneCount > 1" } begrænser en binding til Find-sidebjælken, når workspacet har flere paneler.

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

Åbn valgt fil eller skift mappefokuseret filoversigt

Default file value
enter
fileExplorerOpenSelectionFinderAlias

Åbn valgt fil eller skift mappeFinder-lignende alias for den fokuserede filoversigt

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
saveFilePreview

Save file previewfocused text preview

Default file value
cmd+s

Opdelte paneler

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+=

Lærred

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

Hård genindlæsning af sidefokuseret 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-viser

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"]]

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

Notifikationer

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

Valgfri kontekstprædikater pr. handling (VS Code-lignende when-klausuler), nøgleindekseret efter cmux-handlings-id. En binding udløses kun — og konflikter kun med en anden binding på samme tastetryk — når dens klausul er sand. Udelad klausulen for at beholde handlingens indbyggede kontekst. Klausulernes ordforråd:

  • sidebarFocus, browserFocus, markdownFocus, filePreviewTextEditorFocus, simulatorFocus, terminalFocus, commandPaletteVisible, terminalFindVisible, workspaceCanvasLayout — boolske nøgler. En ukendt eller manglende nøgle læses som false; litteralerne true og false accepteres også.
  • sidebarMode (files, find, sessions, feed, dock), paneCount, workspaceCount — typede nøgler til sammenligninger: den højre sidebjælkes aktive tilstand (streng) samt antal paneler og workspaces (heltal).
  • !, &&, ||, (…), ==, !=, =~, <, <=, >, >=, in [a, b] — boolske operatorer, typede sammenligninger, regex-match og listemedlemskab. Sammenligninger binder tættere end && og ||.

Dette får for eksempel Ctrl+1–9 til at vælge workspaces overalt, undtagen når højre sidebjælke har fokus (så Ctrl+1–5 er fri til sidebjælkens tilstandsskifter), og begrænser overfladevalg til Find-sidebjælken, når workspacet har flere paneler:

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