> For the complete documentation index, see [llms.txt](https://xylem.gitbook.io/xylem-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xylem.gitbook.io/xylem-docs/4.-architecture-and-structure/4-architecture.md).

# Architecture Overview

This section outlines the codebase layout, module mappings, and internal layers of the Xylem engine.

* [Internal Structure](/xylem-docs/4.-architecture-and-structure/4-architecture/internal-structure.md) — Explanation of files, headers, and code organization.