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A2UI as an Architecture Question: Agentic UI B...
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Manfred Steyer
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October 27, 2026
Programming
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A2UI as an Architecture Question: Agentic UI Between AI Freedom and Control
Manfred Steyer
PRO
October 27, 2026
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Transcript
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene A2UI as
an Architecture Question: Agentic UI Between AI Freedom and Control ANGULARarchitects.io
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene 2
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene Some Challenges
for our Dashboard … 3
Mastertextformat Dashboard from Hell bearbeiten … • Textmasterformat bearbeiten •
Zweite Ebene 4
Mastertextformat bearbeiten Trade-off • Textmasterformat bearbeiten Autonomy • Zweite Ebene
Control 5
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene It Takes
Some Time … 6
Mastertextformat bearbeiten Timing • Textmasterformat bearbeiten Just A2UI • Zweite
Ebene • 40 sec • 46,000 Tokens Optimized • 0.1 sec • 1,500 Tokens 7
Mastertextformat bearbeiten • Textmasterformat bearbeiten How to support • Zweite
Ebene dynamic UI as an answer from the agent? 12
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene How to
control results? 13
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene How to
optimize performance? 14
Mastertextformat bearbeiten Agenda 1) A2UI: Dynamic/ Generative UI • Textmasterformat
bearbeiten 2) DSLs & A2UI • Zweite Ebene 3) Caching A2UI 15
Mastertextformat About Me bearbeiten Manfred Steyer, ANGULARarchitects.io • Textmasterformat bearbeiten
• Zweite Ebene (Remote) Angular Workshops and Consulting Google Developer Expert for Angular & AI Blog, Books, Articles, and Talks about Angular 16
Mastertextformat bearbeiten • Textmasterformat bearbeiten How to support • Zweite
Ebene dynamic UI as an answer from the agent? 17
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene 18
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene A2UI: Dynamic
UI 19
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene 20
Mastertextformat bearbeiten Example { "id": "root", "children": ["headline", "name", "..."]
} • Textmasterformat bearbeiten { • Zweite Ebene "id": "headline", "component": "Text", "variant": "h2" "text": "Passenger", } { "id": "name", "component": "Text", "variant": "body" "text": { "path": "/passenger/name" } } 21
Mastertextformat bearbeiten Catalogs • Basic Catalog • Textmasterformat bearbeiten https://a2ui.org/reference/components/
• Zweite Ebene • Custom Catalogs: Components + Functions + Metadata 22
Mastertextformat Create Surface Message bearbeiten { "version": "v0.9", "createSurface": {
"surfaceId": "demo", "catalogId": "http://...", }, • Textmasterformat bearbeiten • Zweite Ebene } 23
Mastertextformat Update Components bearbeiten Message { "version": "v0.9", "updateComponents": {
"surfaceId": "demo", "components": [ { "id": "root", "component": "Column", "children": […], }, […] ] } • Textmasterformat bearbeiten • Zweite Ebene } 24
Mastertextformat Update Data Modelbearbeiten Message { "version": "v0.9", updateDataModel: {
surfaceId: "demo", path: "/passenger", value: { id: 42, name: 'John Doe' }, } • Textmasterformat bearbeiten • Zweite Ebene } 25
Mastertextformat Delete Surface Message bearbeiten { "deleteSurface": { "surfaceId": "demo",
}, • Textmasterformat bearbeiten } • Zweite Ebene 26
Mastertextformat bearbeiten Renderer • React • Textmasterformat bearbeiten • Lit
(Web Components) • Zweite Ebene • Angular • Flutter • Dart • Android • SwiftUI, iOS 27
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene Consuming A2UI
28
Mastertextformat bearbeiten LLM • Textmasterformat bearbeiten • Zweite Ebene Agent
Backend Tools HTTP (SSE) Client Runtime Frontend 29
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene DEMO 30
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene How to
control results? 31
Mastertextformat Dashboard from Hell bearbeiten … • Textmasterformat bearbeiten •
Zweite Ebene 32
Mastertextformat Combine Guardrails bearbeiten Prompts (weak!) Architecture • Textmasterformat bearbeiten
Plan • Zweite Ebene Execute Eval Guard Rails Check Inputs Co-Planning HITL Throttling Params & Auth Checks Check Output Sandboxes 33
Mastertextformat bearbeiten Alternative LLM • Textmasterformat bearbeiten Request(s) • Zweite
Ebene UI Surface (app specific DSL) Agent UI Surface (A2UI) Request Agent Client 34
Mastertextformat Types for Possible DSL bearbeiten { type: "flightsTable", from:
string, to: string, maxRows?: number } •{ type: Textmasterformat "delayedFlightsTable",bearbeiten from: string, to: string, maxRows?: number } • Zweite Ebene { type: "delayShareChart", from: string, to: string, chartType?: "pie" | "bar" } 35
Mastertextformat bearbeiten • Textmasterformat bearbeiten How to take care of
• Zweite Ebene performance? 36
Mastertextformat Cache Everything but bearbeiten Data Model { "version": "v0.9",
updateDataModel: { surfaceId: "demo", path: "/passenger", value: passenger, } • Textmasterformat bearbeiten • Zweite Ebene } 37
Mastertextformat Optimized Workflow bearbeiten • Textmasterformat bearbeiten Cache • Zweite
Ebene LLM DSL A2UI Structure A2UI A2UI Data 38
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene DEMO 39
Agentic UI with Angular Mastertextformat bearbeiten Architectures with Open Standards
• Textmasterformat bearbeiten 220+ pages, PDF, EPUB • Zweite Ebene Regular Free Updates! agentic-angular.com 40
Mastertextformat bearbeiten Conclusion • Textmasterformat bearbeiten A2UI • Zweite Ebene
• UI as JSON • Basic Catalog • Custom Catalogs Tactics Architectue as Guardrail • Server: Request A2UI via prompt • Client: Render A2UI • Tidy by Design • DSL → A2UI • Cache A2UI w/o data 40 sec → 0.1 sec 41
Mastertextformat bearbeiten Manfred Steyer [LinkedIn, Twitter, Facebook] Manfred Steyer •
Textmasterformat bearbeiten [web] ANGULARarchitects.io • Zweite Ebene Slides, Examples, Book Remote Company Workshops and Consulting http://angulararchitects.io @ Manfred Steyer 42