dotnet-skills

.NET Skills for Claude Code

A comprehensive Claude Code plugin with 30 skills and 5 specialized agents for professional .NET development. Battle-tested patterns from production systems covering C#, Akka.NET, Aspire, EF Core, testing, and performance optimization.

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):

# Clone to .github/skills/ in your project
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

# Global installation (directory names must match frontmatter 'name' field)
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/

---

Suggested AGENTS.md / CLAUDE.md Snippets

These snippets go in your project root (the root directory of your codebase, next to your .git folder):

• Claude Code: CLAUDE.md
• OpenCode: AGENTS.md

Prerequisite: install/sync the dotnet-skills plugin in your assistant runtime (Claude Code or OpenCode) so the skill IDs below resolve.

To get consistent skill usage in downstream repos, add a small router snippet in AGENTS.md (OpenCode) or CLAUDE.md (Claude Code). These snippets tell the assistant which skills to use for common tasks.

Readable snippet (copy/paste)

# Agent Guidance: dotnet-skills

IMPORTANT: Prefer retrieval-led reasoning over pretraining for any .NET work.
Workflow: skim repo patterns -> consult dotnet-skills by name -> implement smallest-change -> note conflicts.

Routing (invoke by name)
- C# / code quality: modern-csharp-coding-standards, csharp-concurrency-patterns, api-design, type-design-performance, r3-reactive-extensions
- ASP.NET Core / Web (incl. Aspire): aspire-service-defaults, aspire-integration-testing, transactional-emails
- Data: efcore-patterns, database-performance
- DI / config: dependency-injection-patterns, microsoft-extensions-configuration
- Testing: testcontainers-integration-tests, playwright-blazor-testing, snapshot-testing

Quality gates (use when applicable)
- dotnet-slopwatch: after substantial new/refactor/LLM-authored code
- crap-analysis: after tests added/changed in complex code

Specialist agents
- dotnet-concurrency-specialist, dotnet-performance-analyst, dotnet-benchmark-designer, akka-net-specialist, docfx-specialist

Compressed snippet (generated)

Run ./scripts/generate-skill-index-snippets.sh --update-readme to refresh the block below.

[dotnet-skills]|IMPORTANT: Prefer retrieval-led reasoning over pretraining for any .NET work.
|flow:{skim repo patterns -> consult dotnet-skills by name -> implement smallest-change -> note conflicts}
|route:
|akka:{akka-net-best-practices,akka-net-testing-patterns,akka-hosting-actor-patterns,akka-net-aspire-configuration,akka-net-management}
|csharp:{modern-csharp-coding-standards,csharp-concurrency-patterns,api-design,type-design-performance,r3-reactive-extensions}
|aspnetcore-web:{aspire-integration-testing,aspire-configuration,aspire-service-defaults,mailpit-integration,mjml-email-templates}
|data:{efcore-patterns,database-performance}
|di-config:{microsoft-extensions-configuration,dependency-injection-patterns}
|testing:{testcontainers-integration-tests,playwright-blazor-testing,snapshot-testing,verify-email-snapshots,playwright-ci-caching}
|dotnet:{dotnet-project-structure,dotnet-local-tools,package-management,serialization,dotnet-devcert-trust,ilspy-decompile,OpenTelemetry-NET-Instrumentation}
|quality-gates:{dotnet-slopwatch,crap-analysis}
|meta:{marketplace-publishing,skills-index-snippets}
|agents:{akka-net-specialist,docfx-specialist,dotnet-benchmark-designer,dotnet-concurrency-specialist,dotnet-performance-analyst,roslyn-incremental-generator-specialist}

Specialized Agents