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README.md

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 # littlelearner-5b-chatty
 5B K-5-bounded chat model with general chat, model identity, and format steerability installed by a behavior SFT on the blend base (chatty v2).
 
-Part of the **LittleLearner** scale-up study (*pedagogically-controlled knowledge exposure*): Qwen3 dense LMs trained on a corpus filtered to U.S. K-5 material (**bounded**) vs an unfiltered FineWeb-Edu corpus (**unbounded**), to measure what an interpretable knowledge boundary costs and grants (arxiv.org/abs/2608.13545).
+Part of the [**LittleLearner**](https://arxiv.org/abs/2608.13545) scale-up study (*pedagogically-controlled knowledge exposure*): Qwen3 dense LMs trained on a corpus filtered to U.S. K-5 material (**bounded**) vs an unfiltered FineWeb-Edu corpus (**unbounded**), to measure what an interpretable knowledge boundary costs and grants.
 
 ## Model
 - **Architecture:** Qwen3 dense (`Qwen3ForCausalLM`).