As AI transitions from reactive tools to autonomous agents, the traditional query-response model underpinning search and marketing is dissolving. Visibility, once determined by keyword alignment and ranking, is giving way to eligibility— a brand’s ability to remain embedded within an agent’s decision model.

This article introduces PSOS-E (Eligibility), an evolution of the AIVO Standard’s Prompt-Space Occupancy Score (PSOS), which measures inclusion, persistence, and action frequency in agentic systems. It argues that algorithmic eligibility is now the determinant of market access, fairness, and financial exposure in autonomous commerce.