core: prompt_tab_title binding and apprt action

include/ghostty.h

@@ -804,6 +804,7 @@ typedef enum {
   GHOSTTY_ACTION_DESKTOP_NOTIFICATION,
   GHOSTTY_ACTION_SET_TITLE,
   GHOSTTY_ACTION_PROMPT_TITLE,
+  GHOSTTY_ACTION_PROMPT_TAB_TITLE,
   GHOSTTY_ACTION_PWD,
   GHOSTTY_ACTION_MOUSE_SHAPE,
   GHOSTTY_ACTION_MOUSE_VISIBILITY,
@@ -831,7 +832,7 @@ typedef enum {
   GHOSTTY_ACTION_END_SEARCH,
   GHOSTTY_ACTION_SEARCH_TOTAL,
   GHOSTTY_ACTION_SEARCH_SELECTED,
-} ghostty_action_tag_e;
+  } ghostty_action_tag_e;
 
 typedef union {
   ghostty_action_split_direction_e new_split;

src/Surface.zig

@@ -5186,6 +5186,12 @@ pub fn performBindingAction(self: *Surface, action: input.Binding.Action) !bool
             {},
         ),
 
+        .prompt_tab_title => return try self.rt_app.performAction(
+            .{ .surface = self },
+            .prompt_tab_title,
+            {},
+        ),
+
         .clear_screen => {
             // This is a duplicate of some of the logic in termio.clearScreen
             // but we need to do this here so we can know the answer before

src/apprt/action.zig

@@ -192,6 +192,11 @@ pub const Action = union(Key) {
     /// the apprt to prompt.
     prompt_title,
 
+    /// Set the title of the current tab/window to a prompted value. The title
+    /// set via this prompt overrides any title set by the terminal and persists
+    /// across focus changes within the tab. It is up to the apprt to prompt.
+    prompt_tab_title,
+
     /// The current working directory has changed for the target terminal.
     pwd: Pwd,
 
@@ -347,6 +352,7 @@ pub const Action = union(Key) {
         desktop_notification,
         set_title,
         prompt_title,
+        prompt_tab_title,
         pwd,
         mouse_shape,
         mouse_visibility,

src/input/Binding.zig

@@ -519,6 +519,11 @@ pub const Action = union(enum) {
     /// version can be found by running `ghostty +version`.
     prompt_surface_title,
 
+    /// Change the title of the current tab/window via a pop-up prompt. The
+    /// title set via this prompt overrides any title set by the terminal
+    /// and persists across focus changes within the tab.
+    prompt_tab_title,
+
     /// Create a new split in the specified direction.
     ///
     /// Valid arguments:
@@ -1191,6 +1196,7 @@ pub const Action = union(enum) {
             .reset_font_size,
             .set_font_size,
             .prompt_surface_title,
+            .prompt_tab_title,
             .clear_screen,
             .select_all,
             .scroll_to_top,

src/input/command.zig

@@ -417,6 +417,12 @@ fn actionCommands(action: Action.Key) []const Command {
             .description = "Prompt for a new title for the current terminal.",
         }},
 
+        .prompt_tab_title => comptime &.{.{
+            .action = .prompt_tab_title,
+            .title = "Change Tab Title...",
+            .description = "Prompt for a new title for the current tab.",
+        }},
+
         .new_split => comptime &.{
             .{
                 .action = .{ .new_split = .left },