Clang Tooling refers to the powerful set of libraries and APIs built upon the Clang compiler infrastructure, which allows developers to write custom tools that programmatically analyze and transform C, C++, and Objective-C source code. By providing direct access to the Abstract Syntax Tree (AST)—a detailed, tree-like representation of the code's structure—it enables the creation of sophisticated utilities for tasks such as automated refactoring, static analysis, and code formatting. This framework is the foundation for widely-used tools like `clang-tidy`, which enforces coding standards and finds potential bugs, and `clang-format`, which automatically styles code, making it a cornerstone of modern C++ development workflows.