让推荐系统记住自己过去的推荐和反馈,实现更智能的持续学习。
LoopMemGR: From Behavior Logs to Evolving Memory for Generative Recommendation

- 构建推荐-反馈闭环记忆,融合用户行为与系统推荐记录
- 多视角提取经验信号,显著提升长序列推荐效果
- 适合需要长期用户偏好建模的工业级推荐场景
生成式推荐将下一个物品预测建模为基于离散语义ID的条件自回归生成,在大规模物品空间中实现端到端推荐。然而,现有方法大多采用历史即上下文范式,每次请求后丢弃系统侧的推荐决策,导致记忆不对称:系统记得用户行为,却忘了自己曾推荐什么或从中获得的反馈。这使得有用的偏好验证信号、潜在负样本及历史探索信息无法跨请求复用。为此,我们提出LoopMemGR,一种面向生成式推荐的闭环推荐经验记忆框架。除常规行为日志外,该框架维护推荐-反馈轨迹日志。通过三个互补视角提取相关证据:近期性视角捕捉短期交互动态,频率视角总结重复推荐模式,全局视角提炼跨用户共享的可迁移规律。这些信号被压缩为固定数量的经验令牌,以有限输入预算条件化生成主干模型。在工业级淘宝数据集上的大量实验表明,闭环经验累积与多视角经验提取有效提升了推荐性能。
原文摘要 · Abstract (English)
Generative recommendation formulates next-item prediction as conditional autoregressive generation over discrete Semantic IDs, enabling end-to-end recommendation over large-scale item spaces. However, most existing methods follow a history-as-context paradigm that repeatedly reconstructs user preference from behavior history while discarding system-side recommendation decisions after each request. This creates an asymmetric memory: the system remembers what the user has done, but not what it has previously recommended or learned from the resulting feedback. Consequently, useful preference-validation signals, potential negative evidence, and historical exploration information cannot be directly reused across requests. To address these limitations, we propose LoopMemGR, a closed-loop recommendation experience memory framework for generative recommendation. In addition to the conventional behavior log, LoopMemGR maintains a recommendation experience log that records past recommendation--feedback trajectories. It extracts request-relevant evidence through three complementary views: the recency view captures short-term interaction dynamics, the frequency view summarizes recurring recommendation patterns, and the global view distills transferable regularities shared across users. These signals are compressed into a fixed number of experience tokens to condition the generative backbone under a bounded input budget. Extensive experiments on an industrial Taobao dataset demonstrate the effectiveness of closed-loop experience accumulation and multi-view experience extraction.
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