Determine whether a technology qualifies as an AI system under Art. 3(1) and classify its risk tier (prohibited, high-risk, GPAI with systemic risk, limited risk, minimal risk). Covers scope exclusions (Art. 2), AI system definition test (7 criteria), prohibited practice screening (Art. 5), high-risk assessment (Annex I + III with Art. 6(3) exception), GPAI check, and Art. 50 transparency triggers.