Merge pull request #6183 from Textualize/simple-commands

Simple commands

Author: willmcgugan

CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Fixed type hint aliasing for App under TYPE_CHECKING https://github.com/Textualize/textual/pull/6152
 
+### Changed
+
+- Simplified system commands (command palette) to a single word https://github.com/Textualize/textual/pull/6183
+
 ## [6.3.0] - 2025-10-11
 
 ### Added

src/textual/app.py

@@ -518,7 +518,7 @@ class MyApp(App[None]):
         "inline": lambda app: app.is_inline,
         "ansi": lambda app: app.ansi_color,
         "nocolor": lambda app: app.no_color,
-    }  # type: ignore[assignment]
+    }
 
     title: Reactive[str] = Reactive("", compute=False)
     """The title of the app, displayed in the header."""
@@ -1256,25 +1256,25 @@ def get_system_commands(self, screen: Screen) -> Iterable[SystemCommand]:
         """
         if not self.ansi_color:
             yield SystemCommand(
-                "Change theme",
+                "Theme",
                 "Change the current theme",
                 self.action_change_theme,
             )
         yield SystemCommand(
-            "Quit the application",
+            "Quit",
             "Quit the application as soon as possible",
             self.action_quit,
         )
 
         if screen.query("HelpPanel"):
             yield SystemCommand(
-                "Hide keys and help panel",
+                "Keys",
                 "Hide the keys and widget help panel",
                 self.action_hide_help_panel,
             )
         else:
             yield SystemCommand(
-                "Show keys and help panel",
+                "Keys",
                 "Show help for the focused widget and a summary of available keys",
                 self.action_show_help_panel,
             )
@@ -1291,7 +1291,7 @@ def get_system_commands(self, screen: Screen) -> Iterable[SystemCommand]:
             )
 
         yield SystemCommand(
-            "Save screenshot",
+            "Screenshot",
             "Save an SVG 'screenshot' of the current screen",
             lambda: self.set_timer(0.1, self.deliver_screenshot),
         )

src/textual/dom.py

@@ -179,7 +179,7 @@ class DOMNode(MessagePump):
     # Names of potential computed reactives
     _computes: ClassVar[frozenset[str]]
 
-    _PSEUDO_CLASSES: ClassVar[dict[str, Callable[[object], bool]]] = {}
+    _PSEUDO_CLASSES: ClassVar[dict[str, Callable[[App[Any]], bool]]] = {}
     """Pseudo class checks."""
 
     def __init__(