Memberistic 2.1.1 integrates the central WPistic licensing SDK, settings and update checks. Premium access checks now fail closed when a license is missing or inactive; the core membership engine remains available. Shared SDK loading supports coexistence with other WPistic plugins. Validation: PHP 8.2/8.3 lint and licensing tests, clean distribution checks, real WordPress clean installation, and upgrade from public 2.1.0 all passed in PR #14. The SHA-256 file is attached to this release.