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Create static GitHub Copilot instructions file and restore environment setup workflow (#771)
This PR addresses feedback to properly separate concerns between environment setup and documentation: ## What Changed 1. **Created static `copilot-instructions.md` file** - A comprehensive documentation file committed directly to the repository following [GitHub Copilot best practices](https://gh.io/copilot-coding-agent-tips) 2. **Restored workflow to environment setup focus** - The `copilot-setup-steps.yml` workflow now focuses solely on setting up the development environment needed to run the application ## The Copilot Instructions File The `.github/copilot-instructions.md` file provides comprehensive documentation for GitHub Copilot agents including: - **Project Overview**: Essential C# web platform architecture and purpose - **Tech Stack Details**: .NET 9, ASP.NET Core, Semantic Kernel, Entity Framework, Docker - **Development Patterns**: Coding conventions, file organization, dependency injection patterns - **Testing Strategy**: xUnit setup, testing frameworks, and AAA pattern conventions - **Build Commands**: Essential dotnet commands for development and deployment - **Configuration Guide**: Required secrets, user-secrets setup, OAuth configuration - **AI Integration**: Semantic Kernel patterns, vector database usage, chat services - **Best Practices**: Security guidelines, performance considerations, anti-patterns ## Environment Setup Workflow The workflow now focuses exclusively on preparing the development environment with: - .NET 9.0 SDK with private NuGet feed access - Docker containerization setup and validation - Azure CLI and GitHub CLI tools - Entity Framework Core CLI tools - Node.js for frontend development - Comprehensive testing and validation of all tools This separation ensures the workflow serves its intended purpose of environment preparation while the instructions file provides static, comprehensive documentation that Copilot agents can reference for accurate code generation. <!-- START COPILOT CODING AGENT SUFFIX --> <!-- START COPILOT CODING AGENT TIPS --> --- 💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more [Copilot coding agent tips](https://gh.io/copilot-coding-agent-tips) in the docs. --------- Co-authored-by: copilot-swe-agent[bot] <[email protected]> Co-authored-by: BenjaminMichaelis <[email protected]> Co-authored-by: Benjamin Michaelis <[email protected]>
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‎.github/copilot-instructions.md‎

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# GitHub Copilot Instructions for EssentialCSharp.Web
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## Project Overview & Core Purpose
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This is a comprehensive ASP.NET Core 9.0 web application ecosystem for the **Essential C#** programming education platform. The project serves as the technical foundation for [essentialcsharp.com](https://essentialcsharp.com/), providing educational content, AI-powered chat assistance, and user management for C# learning resources.
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**Key Value**: Provides an interactive learning platform where developers can access Essential C# content, engage with AI-powered assistance for C# questions, and track their learning progress through a modern web interface.
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**Target Audience**: C# developers at all levels, students learning C#, and educators teaching C# programming concepts.
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## Project Structure & Architecture
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This solution follows a modular architecture with clear separation of concerns:
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```
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EssentialCSharp.Web.sln
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├── EssentialCSharp.Web/ # Main ASP.NET Core web application
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│ ├── Areas/ # Identity and feature-specific areas
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│ ├── Controllers/ # MVC controllers
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│ ├── Views/ # Razor views and layouts
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│ ├── Models/ # View models and data models
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│ ├── Services/ # Business logic services
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│ ├── Migrations/ # Entity Framework migrations
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│ └── wwwroot/ # Static assets (CSS, JS, images)
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├── EssentialCSharp.Chat/ # Console application for AI chat
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├── EssentialCSharp.Chat.Shared/ # Shared models and services
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├── EssentialCSharp.Web.Tests/ # Integration tests for web app
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└── EssentialCSharp.Chat.Tests/ # Unit tests for chat functionality
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```
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## Tech Stack & Core Technologies
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### Framework & Runtime
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- **.NET 9.0** with **C# 13** language features
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- **ASP.NET Core 9.0** for web application framework
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- **Entity Framework Core 8.0.10** for data access with SQL Server
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- **ASP.NET Core Identity** for user authentication and authorization
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### AI & Chat Integration
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- **Microsoft Semantic Kernel 1.60.0** for AI orchestration
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- **Azure OpenAI** integration for chat functionality
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- **pgvector with PostgreSQL** for vector database operations
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- **Model Context Protocol (MCP)** for AI agent integration
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### Authentication & Security
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- **GitHub OAuth** integration for developer authentication
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- **Microsoft Account** authentication support
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- **HCaptcha** for bot protection
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- **JWT tokens** for API authentication
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### Development & Deployment
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- **Docker** containerization with multi-stage builds
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- **Azure Application Insights** for telemetry and monitoring
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- **Azure Monitor OpenTelemetry** for observability
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- **Mailjet API** for email services
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### Package Management & Build
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- **Central Package Management** via `Directory.Packages.props`
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- **Private NuGet feed** from Azure DevOps for internal packages
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- **Source Link** for debugging support
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- **Build versioning** with continuous integration support
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## Coding Conventions & Development Patterns
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### Project Structure Conventions
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- **Areas**: Use for Identity and distinct feature modules
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- **Controllers**: Follow MVC pattern with async actions
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- **Services**: Implement business logic with dependency injection
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- **Models**: Separate view models from domain models
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- **Extensions**: Place extension methods in dedicated Extension classes
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### Code Style & Patterns
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- **Async/Await**: Use consistently for all I/O operations
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- **Dependency Injection**: Register services in `Program.cs`
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- **Repository Pattern**: Implement for data access abstraction
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- **Error Handling**: Use structured logging and custom exceptions
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- **Configuration**: Use strongly-typed configuration classes
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### File Naming & Organization
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- **Controllers**: `{Feature}Controller.cs` (e.g., `HomeController.cs`)
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- **Services**: `{Feature}Service.cs` and `I{Feature}Service.cs`
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- **Models**: `{Entity}Model.cs` for view models, `{Entity}.cs` for domain
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- **Extensions**: `{Type}Extensions.cs`
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- **Tests**: `{ClassUnderTest}Tests.cs`
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## Testing Strategy & Frameworks
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### Test Organization
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- **Integration Tests**: `EssentialCSharp.Web.Tests` using `Microsoft.AspNetCore.Mvc.Testing`
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- **Unit Tests**: `EssentialCSharp.Chat.Tests` using `xUnit` and `Moq`
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- **Test Structure**: Follow AAA pattern (Arrange, Act, Assert)
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### Testing Tools
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- **xUnit 2.9.3** as the primary testing framework
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- **Moq 4.20.72** for mocking dependencies
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- **Coverlet** for code coverage collection
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- **Microsoft.AspNetCore.Mvc.Testing** for integration testing
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### Test Conventions
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```csharp
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[Fact]
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public async Task MethodName_Scenario_ExpectedBehavior()
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{
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// Arrange
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var service = new TestService();
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// Act
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var result = await service.MethodAsync();
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// Assert
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Assert.NotNull(result);
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}
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```
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## Build & Development Commands
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### Essential Commands
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```bash
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# Restore all packages
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dotnet restore
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# Build entire solution
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dotnet build --configuration Release --no-restore
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# Run all tests
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dotnet test --no-build --configuration Release
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# Run web application
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dotnet run --project EssentialCSharp.Web
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# Run chat application
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dotnet run --project EssentialCSharp.Chat
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# Entity Framework operations
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dotnet ef migrations add MigrationName --project EssentialCSharp.Web
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dotnet ef database update --project EssentialCSharp.Web
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```
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### Docker Operations
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```bash
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# Build Docker image
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docker build -t essentialcsharp-web -f EssentialCSharp.Web/Dockerfile .
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# Run with Docker Compose (if available)
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docker-compose up --build
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```
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## Configuration & Environment Setup
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### Required Secrets (Use dotnet user-secrets)
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```bash
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# Email configuration
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dotnet user-secrets set "AuthMessageSender:SendFromName" "Essential C# Team"
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dotnet user-secrets set "AuthMessageSender:SendFromEmail" "[email protected]"
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dotnet user-secrets set "AuthMessageSender:SecretKey" "your-mailjet-secret"
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dotnet user-secrets set "AuthMessageSender:APIKey" "your-mailjet-api-key"
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# OAuth providers
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dotnet user-secrets set "Authentication:Microsoft:ClientSecret" "microsoft-oauth-secret"
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dotnet user-secrets set "Authentication:Microsoft:ClientId" "microsoft-oauth-client-id"
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dotnet user-secrets set "Authentication:github:clientSecret" "github-oauth-secret"
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dotnet user-secrets set "Authentication:github:clientId" "github-oauth-client-id"
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# Security
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dotnet user-secrets set "HCaptcha:SiteKey" "hcaptcha-site-key"
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dotnet user-secrets set "HCaptcha:SecretKey" "hcaptcha-secret-key"
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# Application Insights
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dotnet user-secrets set "APPLICATIONINSIGHTS_CONNECTION_STRING" "your-app-insights-connection"
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```
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### Package Feed Configuration
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- Set `<AccessToNugetFeed>false</AccessToNugetFeed>` in `Directory.Packages.props` if you don't have access to private Azure DevOps feed
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- Private feed contains `EssentialCSharp.Shared.Models` and content packages
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## AI Integration Patterns
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### Semantic Kernel Usage
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- **Chat Services**: Implement AI chat functionality using Semantic Kernel
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- **Vector Operations**: Use pgvector for semantic search and retrieval
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- **Model Context Protocol**: Integrate with MCP for agent communication
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- **Prompt Engineering**: Store prompts as structured templates
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### AI Service Patterns
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```csharp
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public interface IChatService
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{
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Task<ChatResponse> ProcessMessageAsync(string message, CancellationToken cancellationToken);
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Task<IEnumerable<SearchResult>> SearchContentAsync(string query, CancellationToken cancellationToken);
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}
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```
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## Development Workflow & Best Practices
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### Code Review Guidelines
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- Ensure all new code includes appropriate tests
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- Follow established naming conventions and patterns
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- Use async/await for all I/O operations
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- Implement proper error handling and logging
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- Add XML documentation for public APIs
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### Performance Considerations
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- Use Entity Framework efficiently (avoid N+1 queries)
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- Implement caching where appropriate
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- Use async patterns for database and API calls
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- Optimize Docker image size with multi-stage builds
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### Security Best Practices
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- Never commit secrets to source control
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- Use HTTPS for all external communications
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- Implement proper input validation
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- Follow OWASP security guidelines
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- Use parameterized queries for database operations
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## Common Patterns & Utilities
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### Service Registration Pattern
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```csharp
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// In Program.cs
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builder.Services.AddScoped<IFeatureService, FeatureService>();
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builder.Services.AddSingleton<ICacheService, CacheService>();
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```
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### Configuration Pattern
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```csharp
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public class FeatureOptions
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{
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public const string SectionName = "Feature";
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public string ApiKey { get; set; } = string.Empty;
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public int TimeoutSeconds { get; set; } = 30;
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}
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// Registration
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builder.Services.Configure<FeatureOptions>(
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builder.Configuration.GetSection(FeatureOptions.SectionName));
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```
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### Error Handling Pattern
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```csharp
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public async Task<Result<T>> MethodAsync<T>()
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{
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try
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{
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var result = await SomeOperationAsync();
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return Result<T>.Success(result);
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}
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catch (SpecificException ex)
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{
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logger.LogError(ex, "Operation failed");
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return Result<T>.Failure(ex.Message);
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}
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}
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```
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## Future Roadmap Considerations
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- **Microservices Evolution**: Consider splitting into microservices as features grow
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- **Performance Optimization**: Implement advanced caching and CDN strategies
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- **AI Enhancement**: Expand AI capabilities with more sophisticated models
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- **Mobile Support**: Potential mobile app integration
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- **API Expansion**: RESTful API for third-party integrations
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## Anti-Patterns & Gotchas
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- **Avoid**: Synchronous calls in async methods (use ConfigureAwait(false))
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- **Avoid**: Large Entity Framework queries without pagination
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- **Avoid**: Hardcoded configuration values (use appsettings.json)
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- **Avoid**: Missing error handling in async operations
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- **Security**: Never expose sensitive configuration in client-side code

‎.github/workflows/copilot-setup-steps.yml‎

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name: Setup GitHub Copilot Agent Environment
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# This workflow configures the environment for GitHub Copilot agents
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# It reuses configuration from the main Build-Test-And-Deploy workflow
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# to ensure consistency and reduce duplication
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on:
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workflow_dispatch:
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permissions:
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contents: read
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jobs:
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setup-environment:
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runs-on: ubuntu-latest
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environment: "BuildAndUploadImage"
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steps:
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- uses: actions/checkout@v5
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- name: Set up .NET Core
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uses: actions/setup-dotnet@v4
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with:
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global-json-file: global.json
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source-url: https://pkgs.dev.azure.com/intelliTect/_packaging/EssentialCSharp/nuget/v3/index.json
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env:
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NUGET_AUTH_TOKEN: ${{ secrets.AZURE_DEVOPS_PAT }}
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- name: Set up dependency caching for faster builds
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uses: actions/cache@v4
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id: nuget-cache
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with:
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path: |
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~/.nuget/packages
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${{ github.workspace }}/**/obj/project.assets.json
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key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
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restore-keys: |
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${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
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${{ runner.os }}-nuget-
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- name: Restore with dotnet
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run: dotnet restore
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- name: Build with dotnet
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run: dotnet build -p:ContinuousIntegrationBuild=True -p:ReleaseDateAttribute=True --configuration Release --no-restore
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- name: Run .NET Tests
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run: dotnet test --no-build --configuration Release
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- name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v3
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- name: Set up Node.js for frontend development
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uses: actions/setup-node@v4
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with:
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node-version: '20'
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- name: Install additional development tools
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run: |
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# Install common development tools that Copilot agents might need
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echo "Installing additional tools for Copilot agent environment..."
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# Install EF Core tools globally
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dotnet tool install --global dotnet-ef

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