Navigating the Unreal Engine source

The engine's own C++ source is the ground truth for every signature, specifier, and include path. Before asserting any API detail, verify it in the source. Memory is often a version or two stale.

When to use this skill

• You need the exact signature of a UFUNCTION/UPROPERTY/virtual override, or its specifiers and meta=(...) clauses.
• You are unsure whether an API exists, was renamed, or moved in 5.8.
• You need the correct #include path or the module name to add to *.Build.cs.
• You want to see how Epic structures a class before writing similar code.
• You are resolving a build error ("unresolved external", "identifier not found") caused by a missing #include or missing Build.cs dependency.

Source tree on this machine