Winget-AutoUpdate (WAU) is a PowerShell-based Windows service that automates daily updates of applications managed by the Windows Package Manager (winget). It runs as scheduled tasks under the SYSTEM account, with optional user-context execution, and provides configurable toast notifications. The architecture is monolithic but well-structured: a main orchestration script (Winget-Upgrade.ps1) loads isolated functions from a `functions/` directory, checks network connectivity, enforces prerequisites, retrieves update lists (blacklist/whitelist) from local files or GPO/external sources, queries winget for outdated packages, and updates each eligible app with support for pre/post scripts ('mods') and custom winget arguments. Configuration is stored in the registry and can be managed via ADMX templates for GPO/Intune. The project includes a self-update mechanism via GitHub releases and a full MSI installer built with WiX. While the code is PowerShell-centric and heavily relies on global variables ($WorkingDir, $WAUConfig, $IsSystem), the function decomposition is clean and several utility functions (semver comparison, argument parsing, log rotation) are independently reusable.