Day 2: Generative UI Gen 1 — Static Components with AG-UI
Dev.to / 6/12/2026
💬 OpinionDeveloper Stack & InfrastructureTools & Practical UsageModels & Research
Key Points
- The article explains “Gen 1” generative UI as static generative UI where an agent does not generate UI code but instead fills predefined, developer-built components with data to keep design systems and accessibility intact.
- It introduces AG-UI (Agent–User Interaction protocol) from the CopilotKit team, framing it as a bidirectional, typed event stream (often via SSE) between agent backends and frontends for UI updates.
- AG-UI is positioned as the counterpart to MCP (agent-to-tool communication) and A2A (agent-to-agent communication), aiming to standardize how agents interact with users in a frontend-safe way.
- The post notes that AG-UI has been adopted across multiple frameworks and ecosystems (including LangChain, Microsoft Agent Framework, AWS, Mastra, and PydanticAI), suggesting teams can rely on a protocol rather than a single framework.
- It proceeds with a concrete example by building a flight search agent, where the frontend registers “renderable actions” (components the agent is allowed to invoke) to safely control what the agent can render.
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