.NET MAUI is a C# and XAML framework for building native mobile and desktop applications from one shared codebase. Developers use it to create apps for Android, iOS, iPadOS, macOS, and Windows. The catalogue entries provide skills, instructions, and agents for working with .NET MAUI.
Borrowing it
Nothing to install: this file belongs to dotnet/maui. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/dotnet/maui/main/.github/instructions/resizetizer.instructions.mdgit clone --depth 1 https://github.com/dotnet/mauiWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/dotnet/maui/resizetizer)<a href="https://agentmods.dev/instructions/dotnet/maui/resizetizer"><img src="https://agentmods.dev/badge/instructions/dotnet/maui/resizetizer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/dotnet/maui/resizetizer"><img src="https://agentmods.dev/badge/instructions/dotnet/maui/resizetizer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.04795 | $0.04795 |
| Opus 5.5 | $0.01918 | $0.01918 |
| Sonnet 5.5 | $0.00959 | $0.00959 |
| Haiku 4.5 | $0.00479 | $0.00479 |
Grade C, and why
maui resizetizer.instructions.md scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf artifacts/obj/Maui.Controls.Sample.Sandbox/Release/net10.0-android/ How it starts
The opening of the file, as written. The whole thing — 331 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Resizetizer MSBuild Targets Guidelines
Guidance for working with .NET MAUI's Resizetizer build system, which processes images, fonts, splash screens, and assets at build time.
See also: .NET for Android's MSBuild Best Practices is the canonical guide for MSBuild target authoring. Its Incremental Builds, Stamp Files, FileWrites and IncrementalClean, When to not use Inputs and Outputs?, and Should I use BeforeTargets or AfterTargets? sections directly inform the patterns documented below.
Architecture Overview
The Resizetizer is an MSBuild-integrated pipeline that processes MauiImage, MauiFont, MauiSplashScreen, and MauiAsset items into platform-specific resources during the build. All core logic lives in a single file:
src/SingleProject/Resizetizer/src/nuget/buildTransitive/Microsoft.Maui.Resizetizer.After.targets
File Loading Order
These files are auto-imported by the NuGet package (<PackageId>.props / <PackageId>.targets), which then pulls in the named hook files:
| File | Loaded | Purpose |
|---|---|---|
Microsoft.Maui.Resizetizer.props |
auto (package) | Early property defaults — currently empty (<Project />) |
Microsoft.Maui.Resizetizer.targets |
auto (package) | SDK registration: sets UsingMicrosoftMauiResizetizerSdk, imports Before.targets, and appends After.targets to AfterMicrosoftNETSdkTargets |
Microsoft.Maui.Resizetizer.Before.targets |
imported by .targets |
Pre-SDK target hooks — currently empty (<Project />) |
Microsoft.Maui.Resizetizer.After.targets |
via AfterMicrosoftNETSdkTargets |
All logic — targets, item registration, platform dispatch |
Microsoft.Maui.Resizetizer.targets appends After.targets to AfterMicrosoftNETSdkTargets, ensuring the logic runs after the .NET SDK targets are loaded.
Local Testing with .buildtasks/
The .buildtasks/ directory at the repo root contains a local copy of the Resizetizer targets used by Sandbox and sample builds. It is NOT git-tracked. When testing MSBuild target changes locally:
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 331 lines · 4,795 tokens per session scan C 088011d8449b
maui resizetizer.instructions.md is an instructions file published in the GitHub repository dotnet/maui (23,322 stars, last pushed today), licensed MIT. It adds 4,795 tokens to every session, about $0.0192 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-12.
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