Auto-derived attendance, shift scheduling, and leave compute presence from productivity intelligence signals — application focus, calendar density, ticket activity — rather than from a physical punch or fingerprint scan. The engine compares engaged minutes against the scheduled shift, surfaces divergences, and resolves leave-calendar conflicts automatically. For knowledge-work teams, this fits remote and hybrid workflows where biometric capture raises GDPR Article 9 proportionality concerns and punch-clock is operationally meaningless.