codecrafters-shell-csharp

codecrafters-shell-csharp is a custom POSIX-compliant shell implemented in C# (.NET 9) , built as part of the CodeCrafters “Build Your Own Shell” challenge. It provides an interactive REPL, reflection-based builtin command discovery (18 builtins), execution of external programs from `PATH`, and support for multi-command pipelines with proper stdin/stdout redirection. The shell also includes tab autocomplete (Trie-based), persistent command history (via `HISTFILE`), and cross-platform support (Windows, Linux, macOS), backed by an extensive automated test suite (~281 unit/integration tests).