Socket/CLI No-Focus-Steal Todo

Goal

Ensure commands run through the cmux Unix socket/CLI do not steal user focus from the current UI workflow.

Policy target:

• App activation/window raising from socket commands: never.
• In-app focus mutation from socket commands: only for explicit focus-intent commands.
• Non-focus commands must not move workspace/pane/surface focus as a side effect.

Task Checklist

• Inventory all v1 + v2 socket command entrypoints.
• Add socket-command focus policy context in TerminalController.
• Suppress app activation for socket command path in AppDelegate (focusMainWindow, createMainWindow).
• Gate in-app focus mutation side-effects in v2 handlers.
• Gate in-app focus mutation side-effects in legacy v1 handlers.
• Add explicit CLI rename-tab command with env-default targeting.
• Update CLI help/usage/subcommand docs for rename-tab.
• Add regression tests for rename-tab and no-unintended-focus-side-effects.
• Run build + targeted tests.
• Open PR.

Explicit Focus-Intent Allowlist

These may mutate in-app focus/selection state:

v1:

• focus_window
• select_workspace
• focus_surface
• focus_pane
• focus_surface_by_panel
• focus_webview
• focus_notification (debug)
• activate_app (debug)

v2:

• window.focus
• workspace.select
• workspace.next
• workspace.previous
• workspace.last
• surface.focus
• pane.focus
• pane.last
• browser.focus_webview
• browser.focus
• browser.tab.switch
• debug.notification.focus
• debug.app.activate

All other commands should preserve current user focus context.

Command Coverage Matrix (All Command Families)

• v1 ping, help

• v1 window commands (list_windows, current_window, focus_window, new_window, close_window)

• v1 workspace commands (move_workspace_to_window, list_workspaces, new_workspace, close_workspace, select_workspace, current_workspace)

• v1 surface/pane commands (new_split, list_surfaces, focus_surface, list_panes, list_pane_surfaces, focus_pane, focus_surface_by_panel, drag_surface_to_split, new_pane, new_surface, close_surface, refresh_surfaces, surface_health)

• v1 input commands (send, send_key, send_surface, send_key_surface, read_screen)

• v1 notification/status/log/report commands (notify*, list_notifications, clear_notifications, set_status, clear_status, list_status, log, clear_log, list_log, set_progress, clear_progress, report_*, ports_kick, sidebar_state, reset_sidebar)

• v1 browser commands (open_browser, navigate, browser_back, browser_forward, browser_reload, get_url, focus_webview, is_webview_focused)

• v1 debug/test commands (shortcut, type, drop/pasteboard, overlay probes, focus checks, screenshots, render/layout/flash/panel snapshot)

• v2 system methods (system.*)

• v2 window methods (window.*)

• v2 workspace methods (workspace.*)

• v2 surface methods (surface.*, tab.action)

• v2 pane methods (pane.*)

• v2 notification methods (notification.*)

• v2 app methods (app.*)

• v2 browser methods (full browser.* set including tab/network/trace/input)

• v2 debug methods (debug.*)

CLI Coverage

• Ensure every top-level CLI command routes to non-focus-stealing socket behavior.
• Add/verify rename-workspace + rename-window behavior remains intact.
• Add explicit rename-tab command (defaults to CMUX_TAB_ID / CMUX_SURFACE_ID / CMUX_WORKSPACE_ID when flags omitted).