dotnet-agentic-engineering

Use when creating, modifying, debugging, or reviewing end-to-end tests for any CLI tool that must run in a real terminal, accept keyboard input, and expose observable terminal output. Prefer Hex1b terminal automation for PTY/headless terminal flows.

Drop-in opinionated .editorconfig for modern C# (C# 14 on .NET 10, also works with C# 10–13) that enforces concise, readable code leveraging the latest language features. Use when setting up code-style rules, naming conventions, formatting, and preview analyzer severities for a new or existing .NET repo. Also covers the required .csproj flags (Nullable, TreatWarningsAsErrors, AnalysisLevel=preview-All, EnforceCodeStyleInBuild) and the .NET 8 vs .NET 9+ build-respect-editorconfig distinction. Generated by the `mcs-editorconfig` template.

Use when creating, modifying, debugging, or reviewing end-to-end tests for any CLI tool that must run in a real terminal, accept keyboard input, and expose observable terminal output. Prefer Hex1b terminal automation for PTY/headless terminal flows.

Drop-in opinionated .editorconfig for modern C# (C# 14 on .NET 10, also works with C# 10–13) that enforces concise, readable code leveraging the latest language features. Use when setting up code-style rules, naming conventions, formatting, and preview analyzer severities for a new or existing .NET repo. Also covers the required .csproj flags (Nullable, TreatWarningsAsErrors, AnalysisLevel=preview-All, EnforceCodeStyleInBuild) and the .NET 8 vs .NET 9+ build-respect-editorconfig distinction. Generated by the `mcs-editorconfig` template.

Fluent 2 Design System for Uno Platform. Use when designing UI layouts, choosing colors, applying typography, setting elevation/shadows, using theme resources, applying lightweight styling, or implementing Fluent Design principles in WinUI/Uno XAML apps. Covers color, typography, geometry, materials, motion, iconography, spacing, elevation, and responsive breakpoints.

Uno Platform XAML correctness and performance guidance for XAML markup profiles: deferred loading with x:Load, virtualized item-template mechanics, text trimming and layout resilience, UI-bound lifecycle cleanup, UI-thread safety at the Page/control boundary, input scopes, keyboard accelerators, focus, and drag/drop caveats. Use when the selected markup type is XAML or when existing XAML needs performance, lifecycle, input, text overflow, or template fixes. Do NOT use for MVVM property/command patterns, Uno Navigation, Fluent or Material theming, visual design/layout composition, Uno C# Markup, or C# Markup 2; combine with the selected update-model, design-system, navigation, and markup skills instead.

Uno Platform MVVM with CommunityToolkit.Mvvm: mutable ViewModels, ObservableObject, ObservableProperty on C# partial properties, RelayCommand, async commands, constructor dependency injection, x:Bind binding patterns, and Uno Navigation from ViewModels. Use when the user selected MVVM as the update model or asks for ViewModel, ICommand, INotifyPropertyChanged, ObservableObject, ObservableProperty, RelayCommand, or CommunityToolkit.Mvvm in an Uno Platform app. Do NOT use for MVUX models/feeds/states; use Studio MVUX skills instead. Do NOT use for C# Markup 2 binding syntax; combine with uno-csharpmarkup2 only when the selected markup type is C# Markup 2.

In-app support for agentic development of Uno Platform apps. Use when running or preparing a Uno Platform app for agent-driven execution with uno_app_start. Also use when the expected log file specified in AGENT_CONSOLE_LOG is missing or lacks "uno-agentic-support" entry, or Hot Reload / Hot Design remains visible during agent UI testing.

LiveCharts2 development guide — installation, XAML source generator integration, theme config, gotchas, and sample index with exact repo file paths. Use when implementing any LiveCharts2 chart (line, area, bar, pie, gauge, heatmap, scatter, polar, financial). Covers all platforms (WinUI, Uno, Avalonia, MAUI, WPF, Blazor, WinForms, Eto).

A responsive, non-virtualizing wrapping grid layout for ItemsRepeater that supports column spans, proportional stretch-to-fill, and vertically aligned gaps. Use when building dashboard-style or card-based layouts where items have varying widths but uniform height.

Build or edit Uno Platform 6 UI in declarative C# with C# Markup 2 (CSharpForMarkup), instead of XAML. Use for Uno 6 apps on .NET 10/9 with MVVM or MVUX, Uno Extensions Navigation/Toolkit, and supported C# Markup 2 integrations such as LiveCharts2, ScottPlot, and Mapsui.

Modular-monolith pattern for Microsoft Orleans 10 — host multiple **logical services** inside one physical silo/microservice, with project/namespace/dependency rules that let any logical service later be extracted to its own physical microservice with minimal changes. Use when starting a new Orleans 10 backend for a single team, when deferring real microservices until genuinely needed (MonolithFirst), when organizing a codebase to follow Conway's Law, or when you want painless future migration from in-silo grain calls to generated OpenAPI HTTP clients. Scaffolds `Apis.<S>Api`, `Contracts.<S>Contract`, and `<S>Service` projects with strict dependency directions (Apis→Contracts, Apis→Service, Service→Contracts), plus a silo host. Generated by the `mcs-orleans-multiservice` template; add more logical services via `AddLogicalService.ps1 <name>` or `--Multiservice .`.

Concise, version-tolerant result pattern for Microsoft Orleans 8+ grain calls. Return success/error without throwing exceptions — errors are `enum ErrorNr` + `string` message, fully Orleans-serialization-compatible, marked `[Immutable]` for zero-copy within-silo calls. Use when designing grain contracts that need non-exception flow control, when returning RFC7807 `ValidationProblemDetails` from ASP.NET Core, when avoiding `FluentResults`-style libraries that don't serialize cleanly under Orleans, or when you want implicit conversions (`return "ok"`, `return ErrorNr.NotFound`, `return (ErrorNr.NotFound, "Not found")`) and pattern-matching consumption. Generated by the `mcs-orleans-results` template, which drops `ErrorNr.cs` + `Result.cs` into the project that contains grain interfaces.

Extends dotnet-livecharts2 for Uno Platform apps that need reliable in-app dark/light/system theme switching with LiveCharts2, shared theme palettes, central refresh of already-loaded charts, and rendered-pixel verification of chart text colors after theme changes.

Resize a running Uno Platform desktop app window on macOS for visual testing. Use when you need to verify responsive layout reflow, test breakpoints, or validate UI at different window sizes. Requires macOS Accessibility API access.

This skill demonstrates how to use the Uno Navigation Extensions `NavigationView` and MVVM to create a data-bound, hierarchical hamburger menu with dynamic navigation. Use when implementing a data-bound hamburger menu.