LW Firewall registration guard

Use this skill when a companion plugin owns the signup UI or transport. LW Firewall automatically wires only the core WordPress registration form; a custom PHP, AJAX, headless, WooCommerce, CRM, LMS, or REST flow must opt in.

Read registration-and-rest-integration.md before implementing a JSON endpoint or copying the manual validation adapter.

Automatic coverage boundary

The plugin registers RegisterGuard only when all of these are true:

• the MU worker is installed and matches LW_FIREWALL_VERSION;
• the master enabled option is true;
• register_protect_enabled is true;
• WordPress users_can_register is true.