.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/public-api.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/public-api)<a href="https://agentmods.dev/instructions/dotnet/maui/public-api"><img src="https://agentmods.dev/badge/instructions/dotnet/maui/public-api/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/public-api"><img src="https://agentmods.dev/badge/instructions/dotnet/maui/public-api.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 | $0.00554 | $0.00554 |
| Opus 5.5 | $0.00222 | $0.00222 |
| Sonnet 5.5 | $0.00111 | $0.00111 |
| Haiku 4.5 | $0.00055 | $0.00055 |
Grade A, and why
maui public-api.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 — 40 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Public API Surface Design
Activation guard: only apply this guidance when the diff actually changes public API surface —
public/protectedtypes or members, interface definitions, builder/extension methods on public types,[Obsolete]markers, orPublicAPI.*.txtentries. The broad.csglobs exist so this guidance loads at the moment of API design (writingpublic class FooinButton.cs), not just when the analyzer-generatedUnshipped.txtis updated afterward. If the diff only changes internals or implementation details, ignore.
API Addition Rules
- New public APIs must have clear, demonstrated use cases — no speculative additions
- API naming must follow .NET design guidelines and be consistent with existing MAUI patterns
- Interfaces belong at
IView/IElementlevel when behavior is cross-cutting — do not duplicate per-control
PublicAPI.Unshipped.txt
- Entries must exactly match the actual API shape (namespace, type, member signature)
- A leading
~is Microsoft.CodeAnalysis.PublicApiAnalyzers' nullable-oblivious marker. It is unrelated to whether an API is public, internal, static, or instance. - Do not manually add or remove
~based on an entry's appearance or inferred API visibility. Preserve analyzer-generated markers and usedotnet format analyzersor the repository's documented PublicAPI generation workflow when correcting entries. - Removing a required
~makes the recorded nullability shape differ from the source API and creates the analyzer mismatch that the marker prevents.
For PublicAPI.Unshipped.txt file management workflow (never disable analyzers,
dotnet format analyzers, revert-then-add pattern), seecopilot-instructions.md§ PublicAPI.Unshipped.txt File Management.
Obsolescence and Removal
- Deprecated APIs must go through
[Obsolete("message")]with migration guidance before removal - Include the replacement API or pattern in the obsolete message
- Breaking changes require explicit design justification documented in the PR
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 · 40 lines · 554 tokens per session scan A 76e5e273f4f7
maui public-api.instructions.md is an instructions file published in the GitHub repository dotnet/maui (23,322 stars, last pushed today), licensed MIT. It adds 554 tokens to every session, about $0.0022 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.
Other instructions, from other repositories
plan-forge api-patterns.instructions.md
API patterns for .NET — REST conventions, ProblemDetails, pagination, versioning, error responses.
plan-forge errorhandling.instructions.md
Error handling patterns — Exception hierarchy, ProblemDetails responses, error boundaries, global exception middleware.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.