Unity Vrc Udon Sharp

If you're building VRChat worlds with UdonSharp, this skill exists because UdonSharp fails silently on almost everything. No List<T>, no async/await, no try/catch, and modifying synced variables without ownership just silently reverts with zero warning. The skill covers the full constraint surface (what compiles vs. what actually works), networking ownership patterns, sync mode selection, and SDK-specific gotchas like NetworkCallable only working on 3.8.1+ and PhysBones callbacks requiring 3.10.0+. The NEVER table alone will save you hours of debugging invisible failures. Treats late joiner correctness and bandwidth budgets as first-class concerns, not afterthoughts.