# Bridging Exploration and Persona: Information-Directed Dueling for Test-Time Agent Personalization > Source: > Published: 2026-10-23 17:40:02+00:00 Effective test-time personalization requires LLM agents to adapt to query-dependent user preferences from lightweight interaction. We study persona selection with binary comparisons between candidate responses as the online signal. We present ID-TAP, a scalable, IDS-inspired neural dueling-bandit fr