New features gradually being rolled out with toggle on*

[Emoji 16.0]

[Camera Settings]

Changes and Improvements gradually being rolled out with toggle on*

[General]

• Improved the visual experience and performance for several scenarios including at the bottom of the screen when the taskbar is set to autohide, desktop icons unexpected flashing (and decreased performance interacting with your PC), and Windows Security pop up for credentials.

Reminders for Windows Insiders in the Beta Channel

• Updates are based on Windows 11, version 25H2 via an enablement package (Build 26220.7755).
• Many features are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time as we monitor feedback to see how they land before pushing them out to everyone in this channel.
• For Windows Insiders who want to be the first to get features gradually rolled out to you, you can turn ON the toggle to get the latest updates as they are available via Settings > Windows Update*. Over time, we will increase the rollouts of features to everyone with the toggle turned on. Should you keep this toggle off, new features will gradually be rolled out to your PC over time once they are ready.
• Features and experiences included in these builds may never get released as we try out different concepts and get feedback. Features may change over time, be removed, or replaced and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they’re ready.
• Some features in active development we preview with Windows Insiders may not be fully localized and localization will happen over time as features are finalized. As you see issues with localization in your language, please report those issues to us via Feedback Hub.
• Check out Flight Hub for a complete look at what build is in which Insider channel.

New features gradually being rolled out with toggle on*

[Emoji 16.0]

[Camera Settings]

Changes and Improvements gradually being rolled out with toggle on*

[General]

• Improved the visual experience and performance for several scenarios including at the bottom of the screen when the taskbar is set to autohide, desktop icons unexpected flashing (and decreased performance interacting with your PC), and Windows Security pop up for credentials.

Reminders for Windows Insiders in the Dev Channel

• Updates are based on Windows 11, version 25H2 via an enablement package (Build 26300.7760).
• Many features are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time as we monitor feedback to see how they land before pushing them out to everyone in this channel.
• The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
• For Windows Insiders who want to be the first to get features gradually rolled out to you, you can turn ON the toggle to get the latest updates as they are available via Settings > Windows Update*. Over time, we will increase the rollouts of features to everyone with the toggle turned on. Should you keep this toggle off, new features will gradually be rolled out to your PC over time once they are ready.
• Features and experiences included in these builds may never get released as we try out different concepts and get feedback. Features may change over time, be removed, or replaced and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they’re ready.
• Some features in active development we preview with Windows Insiders may not be fully localized and localization will happen over time as features are finalized. As you see issues with localization in your language, please report those issues to us via Feedback Hub.
• Check out Flight Hub for a complete look at what build is in which Insider channel.

AI-Assisted Development

Everyone’s hyped about the Ralph Wiggum technqiue for Claude Code.

Install it. Write a prompt. Let AI work autonomously for hours. Come back to a finished app. Sounds incredible.

Here’s what actually happens: You write a prompt. Ralph runs for 45 minutes. It declares victory. You check the output. Half the requirements are missing. iOS doesn’t compile. The “persistence” layer saves to memory that vanishes on restart.

What went wrong? Nothing, actually.

Ralph did exactly what you asked. The problem is what you asked for.

Why "Better Prompts" Doesn't Help

The standard advice is “write better prompts.” More detail. More specificity. That’s like saying “write better requirements” when your app has bugs. True, but useless.

Here’s the non-obvious part: Ralph Wiggum is a loop. It runs, checks your success criteria, and keeps going until all criteria pass. That’s it. That’s the whole trick.

Which means everything depends on the criteria. Vague criteria? Ralph satisfies them vaguely and stops. You asked for “app works on all platforms.” It ran on desktop once, saw no crash, declared success. Technically correct.

The skill isn’t “prompt engineering.” It’s criteria design. And there’s a much simpler way to think about it.

part 1

This is Part 1 of a series on building Uno Platform apps with Studio and a Ralph Loop workflow. The big idea in this post: constraints beat instructions.

Next up: the full Ralph Wiggum Loop system, end-to-end.

Subscribe to the Uno Platform blog →

The Reframe: Constraints, Not Wishes

Forget what you want. Focus on what would block your PR.

You already know this list:

• Does it build on iOS?
• Does it build on Android?
• Do the analyzers pass?
• Are there warnings?
• Does the app actually launch?

 

These are constraints. Binary. Pass or fail. No interpretation required.

Ralph’s success criteria should be the same thing. Not “works correctly” but “`dotnet build -f net10.0-ios` exits 0.” Not “follows best practices” but “no classes implement INotifyPropertyChanged in the Models folder.”

This is the entire insight. Convert wishes into gates.

The Test: Can a Script Check It?

Here’s a simple filter. For each success criterion, ask: “Can a script verify this?”

If yes, it’s a constraint. If no, it’s a wish.

Wish	Constraint
"Works on iOS"	dotnet build -f net10.0-ios exits 0
"Uses MVUX correctly"	IState<T> found in Model classes
"Responsive design"	VisualStateManager defines states at 641px and 1008px
"Data persists"	File exists at specific path after app restart
"Good UX"	All touch targets MinHeight >= 44

Ralph can grep. Ralph can run build commands. Ralph can check file existence. Ralph cannot evaluate “good.”

Every wish becomes a gate. Every gate is binary. That’s the whole approach.

Three Examples That Actually Work

Let me show you weak criteria, what goes wrong, and how to fix them. All three are Uno Platform scenarios because that’s what I work with, but the pattern applies anywhere.

01 Cross-Platform Build

The Task

Create an Uno Platform app with TabBar navigation.

What you might write

✗App works on all platforms

✗No major errors

✗Navigation functions correctly

What actually works

✓dotnet build -f net10.0-ios exits 0, zero warnings

✓dotnet build -f net10.0-android exits 0, zero warnings

✓dotnet build -f net10.0-desktop exits 0, zero warnings

✓dotnet build -f net10.0-browserwasm exits 0, zero warnings

✓TabBar contains min 3 TabBarItem elements in XAML

✓Each TabBarItem has distinct Content page

✓No TODO comments in generated code

What happens with vague criteria → Ralph builds it. Runs it once on desktop. Tabs switch. No crash visible. Done. Three weeks later you try the iOS build. Linker error. Android crashes on startup.

02 MVUX State Management

The Task

Implement user preferences with MVUX and persistence.

What you might write

✗MVUX pattern implemented correctly

✗Settings persist between sessions

✗UI updates reactively

What actually works

✓PreferencesModel.cs uses IState<UserPreferences>

✓No classes implement INotifyPropertyChanged in Models

✓Settings serialized to LocalFolder/preferences.json

✓Persistence test: write, terminate, restart, read

✓Zero binding errors in debug output

✓Uno.Extensions.Reactive in csproj

What happens with vague criteria → Ralph uses INotifyPropertyChanged instead of IState<T> because that's more common in training data. Saves settings to a dictionary in memory. "Persists" until you close the app.

03 Responsive Layout

The Task

Dashboard that adapts from mobile to desktop.

What you might write

✗UI is responsive

✗Looks good on phone and desktop

✗Sidebar collapses on small screens

What actually works

✓VisualStateManager: Compact, Medium, Expanded

✓AdaptiveTrigger: MinWindowWidth 0, 641, 1008

✓NavigationView.PaneDisplayMode changes per state

✓No hardcoded Width in pixels (use Auto or *)

✓All interactive elements: MinHeight ≥ 44, MinWidth ≥ 44

✓No horizontal scrollbar at any breakpoint

What happens with vague criteria → Ralph adds Grid columns with arbitrary breakpoints. "Responsive" technically achieved. "Looks good" evaluated by nobody. Sidebar disappears entirely or overlaps content.

The Constraint Stack

Here’s how I build success criteria now. Four layers, in order:

1 Build Gates

✓dotnet build -f net10.0-ios exits 0

✓dotnet build -f net10.0-android exits 0

✓dotnet build -f net10.0-desktop exits 0

✓dotnet build -f net10.0-browserwasm exits 0

2 Type Contracts

✓Required types exist where expected (IState, IFeed, interfaces)

✓Anti-patterns are absent (no INotifyPropertyChanged, no ObservableCollection)

✓NuGet packages referenced

3 Structural Contracts

✓Required files exist at expected paths (Models/Task.cs, Services/ITaskService.cs)

✓Patterns present in specific files (uen:Navigation.Request in page XAML)

✓Folder structure matches architecture (no code-behind navigation calls)

4 Runtime Verification Contracts

✓App launches without exception

✓Specific behavior verified (nav, persistence)

✓Debug output clean

Stack these. Ralph checks all of them, every loop. If it doesn’t compile on all targets, nothing else matters.

Runtime verification We'll cover runtime UI verification via App MCP screenshots and visual tree inspection in more depth later in this series.

Iteration Budget: A Real Tradeoff

The --max-iterations flag matters more than people realize.

Loose criteria with high iteration cap: Ralph loops forever trying to satisfy something unmeasurable. Burns your usage. Produces garbage. Tight criteria with reasonable cap: Ralph converges fast because exit conditions are clear. 30 iterations is usually enough for a well-specified task.

Tight criteria reduce iteration count, which reduces cost. Vague criteria do the opposite. 

What This Doesn't Fix

Let me be direct about limitations.

Aesthetic judgments: “Looks good” requires eyes. Constrain structure, review visuals yourself.

Performance at scale: “Handles 10K items” or “loads in under 2 seconds” requires load testing. Ralph can build it. You benchmark it.

Security vulnerabilities: XSS, injection, exposure of secrets. Ralph doesn’t audit for these. Run your security tooling separately.

Business logic correctness: “Calculates tax correctly” or “handles edge cases” requires domain knowledge. Constrain the structure, verify the math yourself.

Integration complexity: External APIs, authentication flows, device-specific behavior. Ralph can scaffold. You verify.

The judgment problem: Some decisions are subjective. Ralph will make choices. You might disagree. That’s not a bug.

The pattern: constrain what you can (structure, types, patterns), review what you can’t (aesthetics, security, business logic). 

Remember Autonomous doesn't mean unsupervised. Know when to stop Ralph and review.

Takeaway

Ralph Wiggum isn’t magic. It’s a loop with a termination condition. Your success criteria are that condition.

Vague criteria produce vague results. Binary constraints produce verifiable results. The skill is converting what you want into what can be checked

You already do this for CI pipelines. Do the same thing for Ralph.

Shoutout

Shout out to Geoffrey Hutley, the creator of Ralph and a former contributor to Uno Platform project a few years ago — thanks for building Ralph and pushing the space forward.

The post Ralph Wiggum Explained: Stop Telling AI What You Want — Tell It What Blocks You appeared first on Uno Platform.

This blog post was created with the help of AI tools. Yes, I used a bit of magic from language models to organize my thoughts and automate the boring parts, but the geeky fun and the in C# are 100% mine.

GitHub Copilot just crossed a very interesting line.

It’s no longer “just” helping you write code — it can now run as an agent, with goals, tools, and autonomy, using Microsoft Agent Framework (MAF).

Watch the full video here:

In the video, I walk through three simple C# samples showing how Copilot can be used as an agent, not just a coding assistant.

From autocomplete to autonomy

The mental model shift is simple:

• Copilot as a tool → prompt → suggestion
• Copilot as an agent → goal → plan → act

With Microsoft Agent Framework, GitHub Copilot becomes part of your agent runtime, not just your editor UI.

Sample 1 – Creating a Copilot-backed agent

At its core, you define an agent and tell it what it is allowed to do.

using GitHub.Copilot.SDK;
using Microsoft.Agents.AI;
await using CopilotClient copilotClient = new();
await copilotClient.StartAsync();
AIAgent agent = copilotClient.AsAIAgent(
    instructions: "You are a helpful agent.");

No hacks.
No wrappers.
This agent is powered directly by GitHub Copilot.

Sample 2 – Giving the agent a goal

Instead of prompting, you assign tasks.

await agent.RunAsync("""
Review this C# project and explain what it does.
Focus on architecture and main responsibilities.
""");

This is where Copilot stops responding and starts working.

Sample 3 – Applying it to real dev workflows

In the video, I show how the same agent can be used for things like:

• Understanding unfamiliar repositories
• Explaining legacy code
• Supporting real developer workflows

await agent.RunAsync("""
Analyze this repository and suggest improvements.
Create a summary suitable for a pull request description.
Run the analisys using CODEX and OPUS.
""");

This feels much closer to a junior developer teammate than a chat window.

Why this matters for .NET developers

If you’re building in C# today:

• You already know GitHub Copilot
• You already write .NET services
• You already work with repositories and PRs

Microsoft Agent Framework + Copilot is the shortest path from AI ideas to real systems.

Resources

• GitHub Copilot Agent docs (C#):
  https://learn.microsoft.com/en-us/agent-framework/user-guide/agents/agent-types/github-copilot-agent?pivots=programming-language-csharp

Open-source

Stopwatch Overlay - Always-on-top timer for recordings & presentations by Clemens Vasters

Software Architecture

.NET

.NET Framework 3.5 Moves to Standalone Deployment in new versions of Windows by Tara Overfield

WinGet Configuration: Set up your dev machine in one command by Kayla Cinnamon

Lease Pattern in .NET: A Lock With an Expiration Date That Saves Your Data by Chris Woodruff

Roadmap for AI in Visual Studio (February) by Rhea Patel

Exploring the (underwhelming) System.Diagnostics.Metrics source generators by Andrew Lock

Building a Greenfield System with the Critter Stack by Jeremy D. Miller

Integrate Keycloak with ASP.NET Core Using OAuth 2.0 by Milan Jovanović

Encrypting Properties with System.Text.Json and a TypeInfoResolver Modifier (Part 2) by Steve Gordon

Project Management/Administration

Welcome to the Room by Jeffrey Snove

Shortwave: When institutions stop thinking for themselves by Mike Amundsen

REST/APIs

Sustainable APIs by Alexander Karan

Azure

Auto-install azd extensions in dev containers by PuiChee (PC) Chan

How to Enable Microsoft Entra ID for Azure Cosmos DB (NoSQL) by Sudhanshu Khera

Azure Boards integration with GitHub Copilot includes custom agent support by Dan Hellem

Software Development

Bjarne-s Last Stand: How the Father of C++ Is Fighting a Losing War Against Rust by Henrique Bucher

Code that fits in a context window by Mark Seemann

Essential Rules of Software Engineering by Gérald Barré

Your Idempotent Code Is Lying To You by Derek Comartin

Windows

Microsoft Adds Sysmon To Windows by Slashdot

AI

Using personal instructions in GitHub Copilot Chat by Cassidy Williams

What Senior Engineers Need to Know About AI Coding Tools by Marc Grabanski

How to write a great agents.md: Lessons from over 2,500 repositories by Matt Nigh

Continuous AI in practice: What developers can automate today with agentic CI by GitHub Staff