This one covers UE's multiplayer replication system with real depth. You get role matrices, net driver internals, DOREPLIFETIME condition patterns, and a full RPC decision guide. The source walks through property replication from basic setup to FFastArraySerializer for inventory arrays, explains FRepMovement and why CMC characters skip it, and includes the initial replication burst behavior that catches people off guard. The RPC section references a separate decision flowchart and shows real PlayerController examples. If you're writing dedicated server code or debugging why a property won't replicate to simulated proxies, this gives you the authority checks and condition macros you actually need. Strong reference material for anyone past the tutorial phase of UE networking.
npx skills add https://github.com/quodsoler/unreal-engine-skills --skill ue-networking-replication