Reviews and improves Debug.Log usage in Unity C# projects following structured logging principles: context tags, severity contracts, boundary-based placement, and criticality tiers. Detects common antipatterns (naked Debug.Log, logging in Update, stringly-typed errors), adds missing logs at system/state/error/external boundaries, and scaffolds project-wide logging infrastructure (LogTag constants, formatting helpers, conventions). Use when the user mentions logging, Debug.Log, log messages, debugging, or asks to improve observability in Unity code.