glsl-token-inject-block is a tiny Node.js utility that inserts a block of GLSL token objects (e.g., `#define` directives) into an existing tokenized shader source, positioning the injection after any `#version`, `#extension`, and `precision` statements while preserving correct line spacing. It works directly on the token array produced by `glsl-tokenizer`, making it useful for developers who need to programmatically augment GLSL shaders (such as build tools, preprocessors, or graphics libraries).