luagrapheme is a library for Unicode text segmentation in the Lua programming language. Its goal is to accurately identify textual units such as grapheme clusters (the visual characters perceived by users), words, sentences, and line break opportunities. The project consists of bindings for libgrapheme, a minimalist C library that faithfully implements the algorithms defined by the Unicode Standard. luagrapheme provides integration with the LPeg library, enabling the definition and recognition of patterns and grammars based on Parsing Expression Grammars (PEGs) that incorporate Unicode segmentation algorithms. The methodology combined development in Lua and C, supported by automated testing and continuous integration. The result is a small, predictable, and portable library that enhances Unicode support in the Lua ecosystem and makes multilingual text processing more accessible to developers.