Privacy audit checklist, data leak patterns, and defensive Compact contract patterns for Midnight Network. Use when a user asks about what data is publicly visible on-chain, how to prevent accidental disclosure, how to audit a contract for privacy issues, how to implement commitment/nullifier patterns, domain separation, replay protection, witness trust, or front-running resistance. Also covers transaction semantics (guaranteed vs fallible phase), partial success implications, and what an observer can infer from the public transcript even when witness data is hidden.
