A comprehensive, robust MSBuild-based SDK for .NET projects (.NET 5.0+, .NET Standard 2.0/2.1) with optimizations for .NET 10.0. Features intelligent project structure detection with hierarchical solution discovery, path-based namespace generation from directory structure, and comprehensive error handling that prevents common MSBuild failures. Includes advanced package management with multi-target support, automatic metadata integration from markdown files, source linking, and package validation. Streamlines cross-platform development with automatic project type detection, smart cross-project referencing, InternalsVisibleTo configuration for tests, and GitHub workflow integration. Designed for deeply nested project structures with graceful fallbacks and robust validation throughout.