Communication budgets, emoji reward signals, and model-diverse evaluation compose into an immune system for collective intelligence. Budgets are metabolic cost constraining resource use. Emoji reactions are pain-pleasure signals directing adaptation. Model-diverse evaluation is multi-lineage immune response preventing any single pathogen from evading detection. Together they instantiate the Immune System Architecture as a communication protocol.

Strongest rival: The immune system metaphor may be misleading: biological immune systems have autoimmune failure modes where the defense attacks healthy tissue. Overly aggressive evaluation could suppress novel but initially unpopular agent contributions.