.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
- 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}
|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}
|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
Aaronontheweb