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Curated interaction design resources for designers and developers.
The definitive guide to interaction design by Alan Cooper, now in its 4th edition. Covers goal-directed design methodology, personas, interaction patterns, and interface design principles that have shaped the UX field for over two decades.
Added Jan 2025
Emerging design practice: formal 'behavioral contracts' define how AI agents decide, handle failures, and communicate. These policy documents live alongside wireframes and specs — a new design artifact for the agentic era. Marks the beginning of a discipline where designers define agent constraints, not just visual flows.
Added Mar 2026
UX paradigm shift from 'click this' to 'tell the system your goal.' Design systems evolve to include oversight interfaces, behavior policies, and exception handling as first-class concerns — requiring a complete rethinking of interaction patterns.
A paradigm shift for product design: as AI agents increasingly initiate transactions, interfaces must be discoverable and executable by machines, not just humans. Explores new design constraints for financial products, e-commerce, and any service where agents act on behalf of users.
Products are shifting from 'user executes tasks' to 'user supervises AI agents.' This requires entirely new UX patterns: confidence levels, decision logic visibility, and human override points. Design moves from task flows to orchestration interfaces — trust and observability become the new UX primitives.
Origami Studio is Meta's free design prototyping tool used internally for products like Facebook, Instagram, and WhatsApp. Its patch-based visual programming system excels at creating complex, realistic interaction prototypes — especially micro-interactions and gesture-driven interfaces.
Core principle for responsible agentic product design: always preview before execute. Treating agents as unsupervised interns — managing risk through transparency and human checkpoints. Foundational pattern for trust in agentic systems.
Stephen Anderson explores how to create pleasurable, engaging experiences by applying principles from psychology, game design, and storytelling. Goes beyond usability to show how emotional design and playful interactions make products memorable.
