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Google最新开源A2UI协议,让AI Agent学会"说UI语言",为动态交互带来革命性突破。核心内容: 1. A2UI协议如何解决Agent UI的动态性与安全性挑战 2. 与AG-UI、CopilotKit等现有方案的对比分析 3. 实际应用案例展示协议工作原理及未来发展方向
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{
"surfaceUpdate": {
"surfaceId": "main", # 指定界面区域(surface),支持一个对话有多个界面区域
"components": [
{
"id": "root",
"component": {
"Column": {
"children": {
"explicitList": [
"header",
"date_input",
"confirm_btn"
]
},
"distribution": "start",
"alignment": "stretch"
}
}
},
{ "id": "header", "component": { "Text": { "text": { "literalString": "预订餐厅桌位" }, "usageHint": "h1" } } },
{ "id": "date_input", "component": { "DateTimeInput": { "label": { "literalString": "选择日期和时间" }, "value": { "path": "/reservation/datetime" }, "enableDate": true, "enableTime": true } } },
{ "id": "confirm_btn", "component": { "Button": { "child": "confirm_text", "action": { "name": "confirm_reservation" }, "primary": true } } },
{ "id": "confirm_text", "component": { "Text": { "text": { "literalString": "确认预订" } } } }
]
}
}{
"dataModelUpdate": {
"surfaceId": "main",
"contents": [
{"key": "reservation", "valueMap": [
{"key": "datetime", "valueString": "2025-12-18T19:00"}
]}
]
}
}{
"beginRendering": {
"surfaceId": "main",
"root": "root",
"catalogId": "https://my-company.com/a2ui/v0.8/my_custom_catalog.json"
}
}{"surfaceUpdate": {"surfaceId": "main", "components": [...]}} // Header{"surfaceUpdate": {"surfaceId": "main", "components": [...]}} // Body{"beginRendering": {"surfaceId": "main", "root": "root-id"}} // Initial render{"surfaceUpdate": {"surfaceId": "main", "components": [...]}} // Footer (after initial render){"dataModelUpdate": {"surfaceId": "main", "contents": {...}}} // Populate data
{
"userAction": {
"name": "confirm",
"surfaceId": "main",
"context": {
"details": {
"datetime": "2025-12-16T19:00:00Z",
}
}
}
}04
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