Choosing plugin or CLI

Prefer the plugin when:

• the project already runs pylint directly;
• the configuration should live with the rest of the Pylint settings;
• the same invocation should work for local developers and CI.

Prefer the CLI wrapper when:

• the command line should make the shim behaviour explicit;
• a temporary PyPy lint run is needed without editing project configuration;
• the wrapper is easier to place into a CI job than a Pylint plugin setting.

Both paths call the same public install_patch(...) function, so their patching behaviour is identical.