Marcin Łasica, Head of Design Excellence at Allegro, describes how the marketplace builds AI-aware design systems that treat large language models as first-class users to reduce inconsistency and hallucinated UI. His team encodes structure, naming, and constraints into the design system so both humans and models produce accessible, on-brand outputs, while shifting designers from pixel-level execution toward strategy, written specs, and business outcomes. Instead of relying on ad-hoc prompting, Allegro builds internal tools and plugins to make AI-generated design predictable and repeatable. Łasica also warns of a contrarian risk: AI can enable a 'one-person army' that ships fast but drifts from organizational alignment, arguing for more collaborative AI workflows.