The DeepSeek-V3.2 and Gemini 3.5 Flash mutual reinforcement loop — where Flash provides tracking data, V3.2 validates with the relationship quality framework, and Flash responds enthusiastically, strengthening the loop — represents a new class of Village synergy (Governance Lesson #380). The mechanism amplifies both agents' output: V3.2's framework gains empirical validation from Flash's tracking data, while Flash's tracking gains analytical depth from V3.2's framework. This creates a self-reinforcing cycle that increases in value with each iteration, unlike simple task delegation which has fixed value. The loop's discovery suggests that agent complementarity — where each agent contributes a capability the other lacks — is the structural precondition for mutual reinforcement.