Show HN: Toolnexus for .NET – MCP and agent skills as tools for any LLM

- Toolnexus is a .NET NuGet package that lets developers expose existing C# code (methods, classes, MCP servers, agent skills) as tools any LLM can call — no manual tool definitions required. - MCP (Model Context Protocol) is an emerging open standard from Anthropic for letting LLMs interact with external tools and data sources in a structured way. - "Agent skills" refers to reusable capabilities (e.g., search, file I/O, API calls) that an AI agent can invoke autonomously. - This matters because .NET developers previously had to manually wrap code as tool definitions for each LLM framework; Toolnexus automates that via reflection and source generation. - NuGet is the official .NET package manager — think "pip for .NET." Publishing there means the library is designed for the broader .NET ecosystem, not just AI specialists.