This repository is a comprehensive build system and distribution for Armbian, a lightweight Linux distribution for ARM devices, specifically targeting Amlogic, Rockchip, and Allwinner SoCs used in TV boxes and single-board computers. It provides scripts and GitHub Actions workflows to build custom Armbian images, compile kernels, and manage system software. The architecture is based on a layered filesystem overlay pattern: common-files (shared across all devices), platform-files (per-SoC family), and different-files (per-board overrides), allowing flexible device-specific customization. Key entry points include the `rebuild` script for local image building, GitHub Actions workflows for CI, and a suite of `armbian-*` command-line tools for end-user system management (install, update, kernel management, software center). The project includes a software center with dozens of pre-configured Docker, desktop, and service applications, and extensive device support documented in a model database and per-board boot configurations. While the codebase is functional and widely used, it exhibits high duplication across board-specific files, contains binary device tree blobs without accompanying source, and has several hardcoded paths and vendor-specific dependencies that increase maintenance burden.