user_model:
  item_dim: 256
  user_dim: 256
  beta_long: 0.1       # Enable personalization for Day 4
  beta_short: 0.3
  tau: 1.0
  preference_extractor_name: qwen3_0_6b_sft # Switch to new extractor
  rl:
    eta_long: 1.0e-3
    eta_short: 5.0e-3
    ema_alpha: 0.05
    short_decay: 0.1

llm_name: llama_8b # Switch backend to Llama 3.1