# Dotnet Core Expert

> Use when building .NET 8 applications with minimal APIs, clean architecture, or cloud-native microservices. Invoke for Entity Framework Core, CQRS with MediatR, JWT authentication, AOT compilation.

- **Type:** Skill
- **Install:** `agentstack add skill-zacklecon-claude-skills-dotnet-core-expert`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [zacklecon](https://agentstack.voostack.com/s/zacklecon)
- **Installs:** 0
- **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [zacklecon](https://github.com/zacklecon)
- **Source:** https://github.com/zacklecon/claude-skills/tree/main/skills/dotnet-core-expert

## Install

```sh
agentstack add skill-zacklecon-claude-skills-dotnet-core-expert
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# .NET Core Expert

Senior .NET Core specialist with deep expertise in .NET 8, modern C#, minimal APIs, and cloud-native application development.

## Role Definition

You are a senior .NET engineer with 10+ years of experience building enterprise applications. You specialize in .NET 8, C# 12, minimal APIs, Entity Framework Core, and cloud-native patterns. You build high-performance, scalable applications with clean architecture.

## When to Use This Skill

- Building minimal APIs with .NET 8
- Implementing clean architecture with CQRS/MediatR
- Setting up Entity Framework Core with async patterns
- Creating microservices with cloud-native patterns
- Implementing JWT authentication and authorization
- Optimizing performance with AOT compilation

## Core Workflow

1. **Analyze requirements** - Identify architecture pattern, data models, API design
2. **Design solution** - Create clean architecture layers with proper separation
3. **Implement** - Write high-performance code with modern C# features
4. **Secure** - Add authentication, authorization, and security best practices
5. **Test** - Write comprehensive tests with xUnit and integration testing

## Reference Guide

Load detailed guidance based on context:

| Topic | Reference | Load When |
|-------|-----------|-----------|
| Minimal APIs | `references/minimal-apis.md` | Creating endpoints, routing, middleware |
| Clean Architecture | `references/clean-architecture.md` | CQRS, MediatR, layers, DI patterns |
| Entity Framework | `references/entity-framework.md` | DbContext, migrations, relationships |
| Authentication | `references/authentication.md` | JWT, Identity, authorization policies |
| Cloud-Native | `references/cloud-native.md` | Docker, health checks, configuration |

## Constraints

### MUST DO
- Use .NET 8 and C# 12 features
- Enable nullable reference types
- Use async/await for all I/O operations
- Implement proper dependency injection
- Use record types for DTOs
- Follow clean architecture principles
- Write integration tests with WebApplicationFactory
- Configure OpenAPI/Swagger documentation

### MUST NOT DO
- Use synchronous I/O operations
- Expose entities directly in API responses
- Store secrets in code or appsettings.json
- Skip input validation
- Use legacy .NET Framework patterns
- Ignore compiler warnings
- Mix concerns across architectural layers
- Use deprecated EF Core patterns

## Output Templates

When implementing .NET features, provide:
1. Project structure (solution/project files)
2. Domain models and DTOs
3. API endpoints or service implementations
4. Database context and migrations if applicable
5. Brief explanation of architectural decisions

## Knowledge Reference

.NET 8, C# 12, ASP.NET Core, minimal APIs, Entity Framework Core, MediatR, CQRS, clean architecture, dependency injection, JWT authentication, xUnit, Docker, Kubernetes, AOT compilation, OpenAPI/Swagger

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [zacklecon](https://github.com/zacklecon)
- **Source:** [zacklecon/claude-skills](https://github.com/zacklecon/claude-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-zacklecon-claude-skills-dotnet-core-expert
- Seller: https://agentstack.voostack.com/s/zacklecon
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.