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A2UI as an Architecture Question: Agentic UI Be...
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Manfred Steyer
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September 30, 2026
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A2UI as an Architecture Question: Agentic UI Between AI Freedom and Control
Manfred Steyer
PRO
September 30, 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 Let's imagine
a „Killer App“ … 2
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene VisiCalc, 1979
3
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene "Really, we
need to chat now?" 4
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene To chat
or not to chat … … that's the wrong question! 5
Mastertextformat High Level View onbearbeiten Agentic AI • Textmasterformat bearbeiten
• Zweite Ebene User Intent Iterative Autonomous Behavior Goal Tool Access 6
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene DEMO 7
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene 14
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene Some Challenges
for our Dashboard … 15
Mastertextformat Dashboard from Hell bearbeiten … • Textmasterformat bearbeiten •
Zweite Ebene 16
Mastertextformat bearbeiten Trade-off • Textmasterformat bearbeiten Autonomy • Zweite Ebene
Control 17
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene It Takes
Some Time … 18
Mastertextformat bearbeiten Timing • Textmasterformat bearbeiten Just A2UI • Zweite
Ebene • 40 sec • 46,000 Tokens Optimized • 0.1 sec • 1,500 19
Mastertextformat bearbeiten • Textmasterformat bearbeiten How to support • Zweite
Ebene dynamic UI as an answer from the agent? 24
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene How to
control results? 25
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene How to
optimize performance? 26
Mastertextformat bearbeiten Agenda 1) A2UI: Dynamic/ Generative UI • Textmasterformat
bearbeiten 2) DSLs & A2UI • Zweite Ebene 3) Caching A2UI 27
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 28
Mastertextformat bearbeiten • Textmasterformat bearbeiten How to support • Zweite
Ebene dynamic UI as an answer from the agent? 29
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene 30
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene A2UI: Dynamic
UI 31
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene 32
Mastertextformat bearbeiten Idea LLM • Textmasterformat bearbeiten Request(s) • Zweite
Ebene UI Surface (A2UI) Agent UI Surface (A2UI) Request Agent Client 33
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" } } 34
Mastertextformat bearbeiten Catalogs • Basic Catalog • Textmasterformat bearbeiten https://a2ui.org/reference/components/
• Zweite Ebene • Custom Catalogs: Components + Functions + Metadata 35
Mastertextformat Create Surface Message bearbeiten { "version": "v0.9", "createSurface": {
"surfaceId": "demo", "catalogId": "http://...", }, • Textmasterformat bearbeiten • Zweite Ebene } 36
Mastertextformat Update Components bearbeiten Message { "version": "v0.9", "updateComponents": {
"surfaceId": "demo", "components": [ { "id": "root", "component": "Column", "children": […], }, […] ] } • Textmasterformat bearbeiten • Zweite Ebene } 37
Mastertextformat Update Data Modelbearbeiten Message { "version": "v0.9", updateDataModel: {
surfaceId: "demo", path: "/passenger", value: passenger, } • Textmasterformat bearbeiten • Zweite Ebene } 38
Mastertextformat Delete Surface Message bearbeiten { "deleteSurface": { "surfaceId": "demo",
}, • Textmasterformat bearbeiten } • Zweite Ebene 39
Mastertextformat bearbeiten Renderer • React • Textmasterformat bearbeiten • Lit
(Web Components) • Zweite Ebene • Angular • Flutter • Dart • Android • SwiftUI, iOS 40
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene Consuming A2UI
41
LLM Mastertextformat bearbeiten Backend • Textmasterformat bearbeiten Tools Agent •
Zweite Ebene HTTP (SSE) Client Runtime Component Tools Frontend 42
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene DEMO 43
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene How to
control results? 44
Mastertextformat Dashboard from Hell bearbeiten … • Textmasterformat bearbeiten •
Zweite Ebene 45
Mastertextformat Examples for 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 46
Mastertextformat You Need to Combine bearbeiten Guardrails! • Textmasterformat bearbeiten
• Zweite Ebene 47
Mastertextformat bearbeiten Alternative LLM • Textmasterformat bearbeiten Request(s) • Zweite
Ebene UI Surface (app specific DSL) Agent UI Surface (A2UI) Request Agent Client 48
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" } 49
Mastertextformat bearbeiten • Textmasterformat bearbeiten How to take care of
• Zweite Ebene performance? 50
Mastertextformat Cache Everything but bearbeiten Data Model { "version": "v0.9",
updateDataModel: { surfaceId: "demo", path: "/passenger", value: passenger, } • Textmasterformat bearbeiten • Zweite Ebene } 51
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene DEMO 52
Agentic UI with Angular Mastertextformat bearbeiten Architectures with Open Standards
• Textmasterformat bearbeiten 220+ pages, PDF, EPUB • Zweite Ebene Regular Free Updates! agentic-angular.com 53
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 54
Mastertextformat bearbeiten • Textmasterformat bearbeiten • Zweite Ebene Let's build
the next "Killer App" … 55
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 56