DelvUI is a Dalamud plugin for Final Fantasy XIV that provides a fully customizable replacement for the default HUD. It is a monolithic plugin that uses ImGui for rendering and hooks into game memory via FFXIVClientStructs to read player/party/encounter state. The architecture is heavily event-driven and singleton-based, with a central ConfigurationManager and HudManager that coordinate all HUD elements. The plugin implements a sophisticated attribute-driven configuration system that auto-generates ImGui settings panels from plain C# objects, enabling deep customization of bars, nameplates, party frames, job gauges, status effects, and more. It integrates with several other plugins via IPC (Honorific, PetRenamer, WhosTalking, Wotsit) and includes low-level hooks for pull timers, ready checks, and input interception. The codebase reflects strong engineering in its config abstraction and bar-drawing utilities, but also exhibits significant maintenance debt from hardcoded game IDs, reflection-heavy design, and pervasive singleton use.