Verifying Godot 4 changes from the command line

Reading code is not verification. Run the engine and read what it prints. Use the Godot 4 editor binary the project targets (often godot on PATH); the commands below use godot and run from the project root (the folder with project.godot). --headless needs no display or GPU.

1. Parse-check each changed script

godot --headless --path . --check-only --script res://player/player.gd

Parse errors print as SCRIPT ERROR: Parse Error: <message> followed by at: GDScript::reload (res://player/player.gd:<line>), and the exit code is 1. A clean script prints only the version banner.

Check every new or modified script in a git checkout, staged or not, in one go (from the project root; paths with spaces need a different loop):