ts-metacode is a TypeScript metaprogramming library that provides advanced type-level programming capabilities. It's designed for TypeScript developers who want to perform complex computations and manipulations at the type level, particularly those working with TypeScript 4.1 and above. The library is divided into several key components: 1. **Logic System**: A complete propositional logic system based on AND and NOT operations, supporting multi-bit boolean arrays and various logical operations like implication, equivalence, and XOR. 2. **Mathematical Operations**: Implements natural number arithmetic using string representations, supporting addition, subtraction, multiplication, division, and comparisons. It includes both binary string representation and an internal SNum representation for efficient calculations. 3. **Array Manipulation**: Provides comprehensive array operations including element mapping, filtering, concatenation, and specialized functions like RemoveEnd and RemoveSame. It incorporates most functionality from the typescript-tuple package. 4. **Object Type Manipulation**: Supports recursive mapping and merging of object types with custom fusion policies, allowing for sophisticated type transformations. 5. **String Operations**: Includes JOIN and Split functions for string manipulation, with plans to expand to more operations. 6. **Type Manipulation**: Offers type mapping capabilities using MapUnit and other utilities for converting between different type representations. The library is particularly useful for developers working on advanced TypeScript projects