# Memadapter: Counterfactual Adaptation Against Memory-induced Sycophancy > Source: > Published: 2026-10-06 06:00:14+00:00 Long-term memory enables LLM-based agents to retain and reuse information across tasks and sessions, supporting personalization and long-horizon interactions. However, persistent memories can also induce sycophancy, causing agents to over-align with users' historical beliefs even when they are inacc