Set up custom-instructions.md for NLWebNet repository

[Copilot]

Created a comprehensive custom-instructions.md file to provide guidance for AI assistants working with the NLWebNet codebase. This document serves as a reference for understanding the project's architecture, patterns, and development practices.

Key Sections Added

Project Context

• NLWeb Protocol Implementation - .NET implementation of Microsoft's NLWeb standard
• Proof-of-Concept Status - Clear emphasis that this is experimental software for testing/evaluation only
• Technology Stack - .NET 9, ASP.NET Core, Blazor, Microsoft.Extensions.AI, Model Context Protocol

Architecture Guidance

• Minimal API Preference - Documents the transition from traditional Controllers to Minimal APIs
• Dependency Injection Patterns - Service registration via AddNLWebNet() extension methods
• Service Layer Design - Clear interfaces and implementation patterns

Development Standards

• Code Conventions - C# style guidelines, namespace organization, XML documentation requirements
• Testing Approach - 39 unit tests with MSTest + NSubstitute, manual testing guides
• CI/CD Pipeline - GitHub Actions workflow, NuGet packaging, validation scripts

NLWeb Protocol Implementation

• Core Concepts - Three query modes (List, Summarize, Generate), streaming support
• MCP Integration - Model Context Protocol support with tools and prompts
• Request/Response Flow - Processing pipeline through services and data backends

AI Assistant Guidance

• Common Patterns - When adding features, modifying endpoints, or adding dependencies
• Limitations and Constraints - Current implementation status and deployment considerations
• When to Seek Clarification - Guidelines for complex changes or architectural decisions

This documentation will help AI assistants provide more contextually appropriate suggestions and maintain consistency with the project's experimental nature and architectural patterns.

Fixes #10.

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💡 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 in the docs.

[jongalloway]

@copilot There is some verbiage about this not being production code and a learning project. This is intended as production code. The demo app should be simple where possible, but the NuGet package is intended for production use and should follow all best practices.

[Copilot]

@copilot There is some verbiage about this not being production code and a learning project. This is intended as production code. The demo app should be simple where possible, but the NuGet package is...

Updated the custom-instructions.md to reflect that this is production-ready code. Removed all experimental/proof-of-concept language and reframed the project as a production NuGet package with a simple demo app. Commit: 8e7c3b2

[jongalloway]

@copilot One more clarification: the current state is that it's prerelease and not ready. However, the goal of this repo is to create a library that is intended for production use. So any code additions or edits should be production quality, but currently this is an early prerelease that is not production ready.

[Copilot]

@copilot One more clarification: the current state is that it's prerelease and not ready. However, the goal of this repo is to create a library that is intended for production use. So any code additio...

Updated the custom-instructions.md to clarify that the library is currently in early alpha prerelease (not yet production ready) while maintaining the goal of creating a production-quality library with high code standards. Commit: 2b470c0