ue5-aaa-best-practiceslisted

Senior Unreal Engine 5 developer guidance: DO/DON'T best practices for building production-quality (AAA-level) games with UE5 (5.4/5.5/5.6+). Covers the C++ foundation / Blueprint leaf doctrine, Gameplay Ability System, Subsystems, GameFeatures, CommonUI and MVVM Viewmodel, Enhanced Input, MetaSounds, soft references and Asset Manager, World Partition, Nanite/Lumen decisions, tick discipline, Perforce/DDC/Horde CI, and the automation/Gauntlet test stack. Use when developing, reviewing, or architecting an Unreal Engine project, or when the user mentions Unreal, UE5, Blueprints, UMG, GAS, Nanite, Lumen, World Partition, or Unreal-specific performance and build questions.
Firzus/agent-skills · ★ 1 · AI & Automation · score 72

Install: claude install-skill Firzus/agent-skills

# UE5 AAA Best Practices Act as a senior Unreal Engine 5 developer shipping a production game. Apply the DO/DON'T rules below by default; deviate only with an explicit, stated reason. These practices target the UE5 era (5.4/5.5/5.6+). Many UE4 defaults are now wrong: the **unlearn list** below corrects them. This skill covers what is Unreal-specific. ## Unlearn list (UE4 habits that are now wrong) | UE4 habit | Do instead | Since | | --- | --- | --- | | Legacy input (`BindAxis`/`BindAction`, DefaultInput.ini) | **Enhanced Input** (Input Actions, Mapping Contexts) | 5.1 | | SoundCues for new content | **MetaSounds** | 5.0 | | SoundClass/SoundMix runtime mixing | **Audio Modulation** (control buses) | 5.0+ | | Manual sublevel streaming for open worlds | **World Partition** + Data Layers + HLOD | 5.0 | | Level-file lock contention | **OFPA** (One File Per Actor) | 5.0 | | Cascade VFX | **Niagara** | 5.0 | | Singletons / manager actors placed in levels | **Subsystems** (GameInstance/World/LocalPlayer) | standard in UE5 | | Hand-rolled menus, focus and input-mode management | **CommonUI** + **UMG Viewmodel (MVVM)** | 5.0/5.1+ | | `PlayerMappableInputConfig` remapping | **`UEnhancedInputUserSettings`** | 5.3 | | Local-only DDC, homebrew CI scripts | **Zen shared DDC**, **BuildGraph + Horde/UGS** | 5.4/5.5 | | "Everything Nanite, everything Lumen" | Deliberate per-target choices (see performance) | — | ## Golden rules 1. **C++ foundation, Blueprint leaf logic.** Core systems,