Add missing --version option to CLI and fix mypy error

- Add version callback function to print version and exit
- Add --version option to main CLI callback with proper typer configuration
- Fix mypy error in auth decorators with type ignore comment
- All tests now pass (22/22)
- Type checking passes with only minor warnings

Author: codegen-sh[bot]

src/codegen/cli/auth/decorators.py

@@ -41,6 +41,6 @@ def wrapper(*args, **kwargs):
     sig = inspect.signature(f)
     new_params = [param for name, param in sig.parameters.items() if name != 'session']
     new_sig = sig.replace(parameters=new_params)
-    wrapper.__signature__ = new_sig
+    wrapper.__signature__ = new_sig  # type: ignore[attr-defined]
 
     return wrapper

src/codegen/cli/cli.py

@@ -3,9 +3,17 @@
 
 # Import config command (still a Typer app)
 from codegen.cli.commands.config.main import config_command
+from codegen import __version__
 
 install(show_locals=True)
 
+
+def version_callback(value: bool):
+    """Print version and exit."""
+    if value:
+        print(__version__)
+        raise typer.Exit()
+
 # Create the main Typer app
 main = typer.Typer(
     name="codegen",
@@ -33,5 +41,13 @@
 main.add_typer(config_command, name="config")
 
 
+@main.callback()
+def main_callback(
+    version: bool = typer.Option(False, "--version", callback=version_callback, is_eager=True, help="Show version and exit")
+):
+    """Codegen CLI - Transform your code with AI."""
+    pass
+
+
 if __name__ == "__main__":
     main()