dotnet-skills

.NET Skills for Claude Code

A comprehensive Claude Code plugin with 167 skills and 16 specialized agents for professional .NET development. Combines battle-tested patterns from production systems with comprehensive coverage of the entire .NET ecosystem including C#, ASP.NET Core, Blazor, MAUI, EF Core, Native AOT, testing, security, performance optimization, CI/CD, and cloud-native applications.

Installation

This plugin works with multiple AI coding assistants that support skills/agents.

Claude Code (CLI)

Official Docs

Run these commands inside the Claude Code CLI (the terminal app, not the VSCode extension):

/plugin marketplace add Aaronontheweb/dotnet-skills
/plugin install dotnet-skills

To update:

/plugin marketplace update

GitHub Copilot

Official Docs

Clone or copy skills to your project or global config:

Project-level (recommended):

git clone https://github.com/Aaronontheweb/dotnet-skills.git /tmp/dotnet-skills
cp -r /tmp/dotnet-skills/skills/* .github/skills/

Global (all projects):

mkdir -p ~/.copilot/skills
cp -r /tmp/dotnet-skills/skills/* ~/.copilot/skills/

OpenCode

Official Docs

git clone https://github.com/Aaronontheweb/dotnet-skills.git /tmp/dotnet-skills

mkdir -p ~/.config/opencode/skills ~/.config/opencode/agents
for skill_file in /tmp/dotnet-skills/skills/*/SKILL.md; do
  skill_name=$(grep -m1 "^name:" "$skill_file" | sed 's/name: *//')
  mkdir -p ~/.config/opencode/skills/$skill_name
  cp "$skill_file" ~/.config/opencode/skills/$skill_name/SKILL.md
done
cp /tmp/dotnet-skills/agents/*.md ~/.config/opencode/agents/

Add to AGENTS.md

Copy the following snippet into your project's AGENTS.md file to enable intelligent skill routing:

## .NET Skill Library

You have access to a comprehensive .NET skill library. Use these skills for any C#/.NET development work. Always prefer skill-guided patterns over pre-training knowledge.

### Skill Routing by Task Type

**Writing C# Code:**
- `modern-csharp-coding-standards` - Records, pattern matching, immutability, value objects, async patterns
- `csharp-concurrency-patterns` - Choosing between async/await, Channels, locks, synchronization primitives
- `csharp-api-design` - API surface design, versioning, backward compatibility
- `csharp-type-design-performance` - Sealed classes, readonly structs, Span<T>, Memory<T>

**Entity Framework Core:**
- `efcore-patterns` - DbContext lifecycle, NoTracking, query splitting, migrations, interceptors
- `database-performance` - N+1 prevention, read/write separation, query optimization

**ASP.NET Core Web:**
- `middleware-patterns` - Pipeline ordering, custom middleware, exception handling
- `razor-pages-patterns` - Page models, validation, anti-forgery, routing
- `validation-patterns` - FluentValidation, DataAnnotations, custom validators
- `exception-handling` - ProblemDetails, global handlers, error responses
- `caching-strategies` - Output caching, Redis, HybridCache (.NET 9+)
- `rate-limiting` - Request throttling, sliding window, concurrency limits
- `security-headers` - CSP, HSTS, CORS, security middleware

**Background Processing:**
- `background-services` - BackgroundService, IHostedService, outbox pattern, graceful shutdown
- `dotnet-channels` - Producer/consumer, bounded channels, backpressure

**Dependency Injection:**
- `microsoft-extensions-dependency-injection` - Service lifetimes, keyed services, factory patterns
- `microsoft-extensions-configuration` - IOptions, configuration providers, secrets

**Testing:**
- `dotnet-testing-strategy` - Test pyramid, unit vs integration decisions
- `dotnet-xunit` - xUnit patterns, fixtures, theory data
- `testcontainers` - Docker-based integration tests, database fixtures
- `snapshot-testing` - Verify library, approval testing
- `dotnet-playwright` - E2E browser testing
- `crap-analysis` - CRAP scores, coverage analysis

**Performance:**
- `dotnet-benchmarkdotnet` - Benchmark design, measurement methodology
- `dotnet-performance-patterns` - Allocation reduction, GC optimization
- `dotnet-profiling` - Profiler usage, hotspot identification
- `dotnet-gc-memory` - GC modes, memory pressure, Large Object Heap

**Native AOT:**
- `dotnet-native-aot` - AOT compilation, publishing, constraints
- `dotnet-trimming` - Size optimization, linker configuration
- `dotnet-aot-wasm` - WASM AOT with Blazor

**Security:**
- `dotnet-security-owasp` - OWASP Top 10 for .NET
- `dotnet-cryptography` - Encryption, hashing, key management
- `dotnet-secrets-management` - Secret storage, Azure Key Vault, user secrets
- `asp-net-core-identity-patterns` - Authentication, authorization, MFA