Frozen Embeddings, LLM Retrieval Lanes, Critic-Guided Replies: Conversational Music Recommendation at an Information-Limited Ceiling
Team volart’s submission to the RecSys 2026 Music-CRS challenge is a three-stage pipeline that needs no local GPU (every learned component trains on CPU or calls a hosted API): multi-lane retrieval fused by Reciprocal Rank Fusion, a LambdaMART reranker, and a critic-guided response stage. It placed 2nd overall and 1st...