.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/templates.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/templates)<a href="https://agentmods.dev/instructions/dotnet/maui/templates"><img src="https://agentmods.dev/badge/instructions/dotnet/maui/templates/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/templates"><img src="https://agentmods.dev/badge/instructions/dotnet/maui/templates.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 | $0.00764 | $0.00764 |
| Opus 5.5 | $0.00306 | $0.00306 |
| Sonnet 5.5 | $0.00153 | $0.00153 |
| Haiku 4.5 | $0.00076 | $0.00076 |
Grade A, and why
maui templates.instructions.md scanned grade A with 0 findings 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Working with .NET MAUI Templates
1. Overview
When modifying files in the src/Templates/ directory, you must follow special template semantics and conventions to ensure the templates work correctly when users create new projects. This guide covers conditional compilation directives, naming conventions, file exclusions, and testing procedures.
2. Conditional Compilation
Templates use special comment markers to control how preprocessor directives are processed during template instantiation.
Build-Time Directives (Platform-Specific)
Platform-specific #if directives (like #if WINDOWS, #if ANDROID, #if IOS, #if MACCATALYST) must be wrapped with //-:cnd:noEmit and //+:cnd:noEmit markers:
//-:cnd:noEmit
#if WINDOWS
// Windows-specific code
#endif
//+:cnd:noEmit
Why? These markers tell the template engine to preserve these directives in the generated code exactly as-is, so they will be evaluated at compile-time when the user builds their project.
Examples:
//-:cnd:noEmit
#if DEBUG
builder.Logging.AddDebug();
#endif
//+:cnd:noEmit
//-:cnd:noEmit
#if IOS || MACCATALYST
handlers.AddHandler<CollectionView, CollectionViewHandler2>();
#endif
//+:cnd:noEmit
//-:cnd:noEmit
#if WINDOWS
Microsoft.Maui.Controls.Handlers.Items.CollectionViewHandler.Mapper.AppendToMapping(
"KeyboardAccessibleCollectionView",
(handler, view) => { /* ... */ });
#endif
//+:cnd:noEmit
Template-Time Directives (Template Parameters)
Template parameter directives (like #if (IncludeSampleContent)) do NOT use the //-:cnd:noEmit markers:
#if (IncludeSampleContent)
using CommunityToolkit.Maui;
#endif
Why? These directives are evaluated when the template is instantiated (when user runs dotnet new maui), not when the code is compiled.
3. Naming and Placeholders
- Template project names use placeholders like
MauiApp._1which get replaced with the user's actual project name - Namespaces follow the same pattern:
namespace MauiApp._1; - These will be transformed to the user's chosen project name during template instantiation
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 · 92 lines · 764 tokens per session scan A 3dfe72f9304a
maui templates.instructions.md is an instructions file published in the GitHub repository dotnet/maui (23,322 stars, last pushed today), licensed MIT. It adds 764 tokens to every session, about $0.0031 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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