Compare responsibilities before APIs.
Generative UI is not a single-choice category. These four layers answer different architectural questions and can compose into one runtime path.
01
Agent ↔ frontend interaction
How do runs, messages, tools and state move?
02
Declarative UI & rendering
How is UI intent constrained and rendered?
04
Implementation & integration
What ships the product experience?
CopilotKitplatform · activeAgent frameworksmany implementations