Skip to main content
Back to Blog
Agent-Flutter — The Problem
BuildingInPublicFlutter + AI

Agent-Flutter — The Problem

Ulrich Diedrichsen
Ulrich Diedrichsen
12 min read

Last week, I was sitting in another tech meetup listening to someone pitch their "revolutionary AI agent" that could "transform any workflow." The demo? A chatbot that could write emails and summarize documents. Don't get me wrong, that's useful, but

AI Agents and Real App Control: Why Everyone's Talking About It But Nobody's Actually Doing It

Introduction

Last week, I was sitting in another tech meetup listening to someone pitch their "revolutionary AI agent" that could "transform any workflow." The demo? A chatbot that could write emails and summarize documents. Don't get me wrong, that's useful, but I couldn't shake this nagging feeling: where are the agents that actually control real applications?

I mean, we've all seen the impressive demos of ChatGPT writing code or Claude analyzing spreadsheets. But when was the last time you saw an AI agent navigate through a mobile app, tap buttons, fill forms, or handle complex user flows? Not through APIs or command lines, but actually interacting with the GUI like a human would?

This question has been eating at me for months. Everyone's building agents that live in text bubbles, but our digital lives happen in visual interfaces. We tap, swipe, scroll, and navigate through countless apps daily. If AI agents are supposed to be our digital assistants, shouldn't they be able to do the same? That's what led me to start exploring what I call "Agent-Flutter" – an experiment in building AI agents that can actually control Flutter applications through their user interfaces.

The more I dig into this problem, the more I realize why nobody's really tackled it yet. It's hard. Really hard. But also incredibly important if we want agents that can truly integrate into our existing digital workflows.

The Problem in Detail

Let's be brutally honest about what's happening in the AI agent space right now. Most "agents" are glorified chatbots with function calling capabilities. They can query databases, send emails, or generate reports, but ask them to navigate through your favorite mobile app to complete a task, and they're completely lost.

Picture this scenario: You want an AI agent to help you book a restaurant reservation through OpenTable's mobile app. A human would open the app, search for restaurants, filter by cuisine and availability, select a time slot, and confirm the booking. It involves dozens of UI interactions – tapping search bars, scrolling through lists, selecting date pickers, navigating between screens.

Now try to imagine how an AI agent would handle this. The current approach would be to hope OpenTable has a public API (they do, but it's limited), write integration code, and work within those constraints. But what if the app doesn't have an API? What if you need to interact with a custom enterprise app, or a client's proprietary system, or literally any of the millions of mobile apps that don't offer programmatic access?

The problem gets worse when you consider the dynamic nature of modern UIs. Apps update their interfaces constantly. A button that was labeled "Submit" yesterday might be an icon today. A form that had three fields last week might have five now. Navigation patterns change, new features get added, and sometimes entire workflows get redesigned.

Traditional automation tools like Selenium work okay for web interfaces, but they rely heavily on fixed selectors and predetermined paths. They break constantly and require maintenance every time the UI changes. Mobile automation tools exist too, but they're even more fragile and typically require deep integration with the app's codebase.

What we really need is an AI agent that can understand user interfaces the way humans do – through visual recognition, contextual understanding, and adaptive behavior. An agent that can look at a screen, understand what each element does, and figure out how to accomplish a goal even if the interface has changed since its last interaction.

My Analysis

After spending months researching this problem, I've identified three core challenges that explain why real GUI automation for AI agents is so rare.

First, there's the perception problem. Computer vision for UI understanding is genuinely difficult, but it's not impossible with today's technology. We have vision-language models that can describe images in detail, understand spatial relationships, and even read text from screenshots. The issue is that most developers don't think about UI automation this way. They're stuck in the API mindset – if there's no programmatic interface, they assume it can't be automated.

The second challenge is architectural. Most AI agents are built as separate systems that interact with applications through APIs or command-line interfaces. They're designed to live outside the applications they're trying to control. But GUI automation requires being inside the app's runtime environment, or at least having deep access to its UI layer. This means rethinking how we build agents from the ground up.

The third challenge is dynamic adaptation. Traditional automation scripts are brittle because they rely on static assumptions about UI structure. An AI agent needs to be more like a human – able to adapt when things change, understand context, and even recover from errors gracefully. This requires combining computer vision, natural language understanding, and decision-making capabilities in real-time.

What most people get wrong is thinking this is purely a computer vision problem. Sure, you need to be able to "see" the interface, but that's just the input layer. The real challenge is building an agent that can reason about what it sees, understand the user's intent, plan a sequence of actions, and execute them reliably.

I've seen teams try to solve this with pixel-perfect image matching or rigid coordinate-based clicking. These approaches work in demos but fail spectacularly in real-world scenarios. The UI changes, the screen resolution differs, or the app loads in a slightly different state, and everything breaks.

The key insight I've had is that successful GUI automation requires the same kind of flexible, contextual understanding that humans use. When you open an unfamiliar app, you don't memorize pixel coordinates – you recognize patterns, read labels, understand hierarchies, and experiment until you figure out how things work. That's exactly what AI agents need to do.

The Solution Approach

My approach with Agent-Flutter centers on building AI agents that are native to the Flutter ecosystem from the ground up. Instead of trying to control Flutter apps from the outside, I'm embedding the agent directly into the Flutter runtime environment. This gives the agent unprecedented access to the widget tree, state management, and event system.

The architecture has three main components: a visual perception layer, a reasoning engine, and an action execution system. The visual perception layer uses the Flutter framework's built-in accessibility features combined with computer vision models to understand the current UI state. Flutter's widget tree is inherently structured and semantic, which makes it much easier to parse than trying to analyze raw pixels.

Instead of taking screenshots and running OCR, the agent can directly access widget properties, text content, and semantic information that Flutter already maintains for accessibility purposes. This eliminates a huge class of brittle automation problems right from the start. The agent knows that a TextField is a TextField, not just a rectangular region that might contain text.

The reasoning engine is where the magic happens. I'm using a combination of language models and custom logic to translate high-level user goals into sequences of UI actions. The agent maintains a dynamic model of the current app state and can reason about how different actions will change that state. It's like having a mental model of how the app works, which gets updated in real-time as the agent interacts with it.

For action execution, I'm building on Flutter's testing framework but making it much more intelligent. Instead of hardcoded tap coordinates or widget finders, the agent uses semantic understanding to locate UI elements and interact with them. It can find a "Submit" button even if the developer changed its label to "Send" or moved it to a different location on screen.

One crucial architectural decision was making the agent conversational by default. Instead of trying to guess what the user wants, the agent can ask clarifying questions, explain what it's about to do, and even teach the user about app features they might not know about. This transforms GUI automation from a black box into a collaborative experience.

The system is designed to be self-improving. Every interaction gets logged and analyzed, so the agent gets better at understanding common UI patterns and user preferences over time. It builds up a knowledge base of how different types of interfaces work and can apply that knowledge to new apps.

Practical Example

Let me walk you through a concrete example of how this works in practice. Imagine you're building a Flutter e-commerce app and you want an AI agent that can help users complete purchases.

The user says: "I want to buy a blue shirt in size medium under $50." The agent starts by analyzing the current screen state through Flutter's semantic tree. It identifies key elements like search bars, navigation menus, and product categories.

// Agent's internal reasoning process
class ShoppingAgent extends FlutterAgent {
  Future<void> findProduct(String query, Map<String, dynamic> criteria) async {
    // Analyze current UI state
    final screenAnalysis = await analyzeWidgetTree();
    
    // Look for search functionality
    if (screenAnalysis.hasSearchBar) {
      await semanticTap(find.byType(TextField));
      await enterText(query);
      await semanticTap(find.text('Search'));
    } else if (screenAnalysis.hasCategories) {
      // Navigate through category structure
      await navigateToCategory('Clothing');
      await navigateToCategory('Shirts');
    }
    
    // Apply filters based on criteria
    await applyFilters({
      'color': criteria['color'],
      'size': criteria['size'],
      'maxPrice': criteria['maxPrice']
    });
    
    // Select appropriate product
    final products = await getVisibleProducts();
    final bestMatch = selectBestProduct(products, criteria);
    await selectProduct(bestMatch);
  }
}

What makes this different from traditional automation is the semantic understanding. The agent doesn't look for specific widget types or coordinates. Instead, it understands concepts like "search bar," "filter," and "product listing" regardless of how they're implemented in the specific app.

If the app's search functionality is implemented as a custom widget that looks like a magnifying glass icon, the agent can still find it by understanding its purpose from context and accessibility labels. If the filters are dropdown menus instead of checkboxes, the agent adapts its interaction strategy automatically.

The agent can also handle interruptions gracefully. If a loading screen appears, it waits. If an error message pops up, it reads the message, understands what went wrong, and either retries with different parameters or reports back to the user with a clear explanation.

Throughout this process, the agent maintains a conversation with the user: "I found several blue shirts in medium. There's one from Brand A for $35 and another from Brand B for $48. Which one interests you more?" This keeps the user informed and involved rather than making assumptions about their preferences.

Lessons Learned

Building this system has been a masterclass in the gap between AI demos and production-ready automation. My first attempts were embarrassingly naive – I thought I could just feed screenshots to GPT-4 Vision and have it generate tap coordinates. That worked for exactly one very specific scenario and broke immediately when anything changed.

The biggest lesson was realizing that successful GUI automation isn't about perfect computer vision or flawless action prediction. It's about building systems that fail gracefully and recover intelligently. Real apps are messy, inconsistent, and constantly changing. Your agent needs to expect that and work with it, not against it.

I spent way too much time trying to make the visual perception perfect before I realized that Flutter's accessibility framework gives you most of what you need for free. The semantic information is already there – you just need to know how to use it effectively. This was a humbling reminder that sometimes the best technical solution isn't the most impressive one.

Another crucial insight was that user intent is often ambiguous, and that's okay. Instead of trying to build an agent that perfectly interprets every request, I focused on building one that knows when to ask for clarification. Users actually prefer this – they'd rather have a brief conversation than watch an agent make wrong assumptions about what they want.

Performance was another surprise challenge. Vision-language models are slow, and users expect mobile interactions to be instant. I had to get creative about caching, precomputing likely next states, and running analysis in parallel with user interactions. The agent needs to feel responsive even when it's doing complex reasoning in the background.

Testing this system revealed how different real user behavior is from developer assumptions. Users don't follow linear paths through apps. They jump around, use features in unexpected ways, and often have multiple goals simultaneously. Building an agent that can handle this chaos while still being helpful required completely rethinking how I approach task planning.

Conclusion and Outlook

After months of working on this problem, I'm convinced that GUI-native AI agents represent the next major evolution in how we interact with software. We're moving beyond the era of agents that live in chat windows toward agents that can navigate and control the visual interfaces we actually use every day.

The technical challenges are significant but solvable. Flutter's semantic architecture provides an excellent foundation for building agents that understand user interfaces at a deeper level than pixel-based automation ever could. The key is embracing the collaborative nature of human-AI interaction rather than trying to build fully autonomous systems.

What excites me most is how this approach could democratize automation. Instead of requiring developers to build specific APIs or integrations for every possible use case, users could have agents that adapt to whatever interfaces they encounter. Small businesses could automate workflows in proprietary software, researchers could extract data from legacy systems, and everyday users could have genuine digital assistants that work across all their apps.

The implications go beyond just convenience. As our digital lives become increasingly complex, we need tools that can help us navigate that complexity without forcing us to learn new interfaces or abandon the apps we already use. AI agents that understand and control GUIs could be the bridge between the promise of artificial intelligence and the reality of how we actually work and live with technology.

I'm continuing to develop this concept, and I'd love to hear from others who are thinking about similar problems. The challenge is too big for any one person or team to solve alone, but I believe we're on the cusp of a breakthrough that could fundamentally change how we think about human-computer interaction.


Follow me on Twitter or Bluesky for updates.

Tags:

BuildingInPublicFlutter + AI
Ulrich Diedrichsen

Ulrich Diedrichsen

AI Product Builder & Workshop Operator

40 years of software engineering. Ex-IBM, Ex-PwC. Now building real products with AI in Hamburg.