CliWrap is a .NET library that provides an airtight, fluent abstraction over System.Diagnostics.Process for interacting with command-line interfaces. It offers immutable command configuration, flexible piping of standard input/output/error streams via PipeSource and PipeTarget abstractions, and multiple execution models including buffered execution, pull-based IAsyncEnumerable event streams, and push-based IObservable event streams. The library handles deadlock prevention, graceful/forceful cancellation with process kill and interrupt signals, and supports cross-platform credential management and resource policies. Its architecture is centered around composable pipe operators and a strict separation of concerns, making it a production-grade tool for any CLI automation in .NET. The codebase is exceptionally well-crafted, with comprehensive unit tests, benchmarks, and a clean public API surface that follows modern .NET conventions.