Use arXiv citation

Update paper link to real arXiv (2608.25625)

Fix baseline citation (Arabzadeh et al., CIKM 2021)

Delete files configuration_irouterlm.py modeling_irouterlm.py with huggingface_hub

Set model_type=retrievalrouter

Rename custom code to RetrievalRouter

Rename custom code to RetrievalRouter

Add baseline model card

Upload tokenizer

Upload model

initial commit