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unreal-source-code-navigator
Use when Codex must write, modify, review, or explain Unreal Engine C++/plugin/editor/gameplay code and needs to learn actual local APIs before acting: source indexes, class hierarchy, module/plugin ownership, Build.cs, uplugin descriptors, dependencies, includes, UHT reflection, properties, functions, delegates, call sites, validation commands, system layer, AssetManager, CoreGameData, GameInstance, WorldSubsystem, GameplayTags, input, InputCore, CommonUI, CommonInput, EnhancedInput, GameFeatures, Experience, network replication, RPC, NetDriver, ReplicationGraph, GAS, UMG, Slate, Localization, GameplayMessageRouter, OnlineSubsystem, Editor tools, and cross-platform source navigation.
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