PackArcade Full Lockdown

School-GIT device assurance and optional focus lockdown with privacy-first extension attestation.

PackArcade Full Lockdown is the official School-GIT browser assurance, focus, and Realm policy companion. It securely connects the browser to School-GIT, verifies that the genuine extension is installed and active, and enables School-GIT Realm policies such as managed browsing, approved-site access, focus sessions, fullscreen environments, safe navigation, and account-aware restrictions. The extension uses cryptographic installation verification instead of relying on a simple “I installed it” confirmation. When the user chooses to link a Google account, Chrome’s secure Identity/OAuth system can also be used for trusted-device School-GIT account recovery. Depending on the active School-GIT Realm, the extension can: Enforce approved School-GIT and PackArcade destinations Support managed focus and fullscreen sessions Apply School-GIT Realm access policies Verify the extension installation cryptographically Assist with trusted-device account recovery Redirect blocked navigation to School-GIT policy pages Coordinate with School-GIT’s Managed Access fallback when full extension capabilities are unavailable Privacy-first design: the extension does not require Google passwords, does not read Gmail or Google Drive content, and does not use public-IP fingerprinting for installation verification. Account identity is used only for School-GIT linking, trusted-device recovery, and policy enforcement. School-GIT remains usable when the extension cannot be installed. In those situations, School-GIT can automatically apply its Managed Access Realm with reduced and restricted functionality rather than completely denying access.