Update README.md

README.md

@@ -108,6 +108,25 @@ It has not undergone exhaustive manual quality review.
 Source licensing and redistribution obligations require review
 before public release.
 
+## Licensing and Redistribution
+
+NeoCorpus is an independently curated derivative of [NVIDIA Nemotron-ClimbMix](https://huggingface.co/datasets/nvidia/Nemotron-ClimbMix), obtained through [Andrej Karpathy's globally shuffled redistribution](https://huggingface.co/datasets/karpathy/climbmix-400b-shuffle).
+
+The original NVIDIA dataset is published under the **Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)** license. NeoCorpus is redistributed subject to the applicable attribution and non-commercial conditions of that license.
+
+The following modifications were made:
+- Selection of a subset from globally shuffled source shards.
+- Document length filtering and whitespace normalization.
+- Removal of exact duplicate training documents.
+- Creation of separate training, validation, and test splits.
+- Addition of document identifiers, provenance metadata, and estimated token counts.
+
+The original NVIDIA dataset and Karpathy's redistribution are credited in the Attribution section below.
+
+NeoCorpus is an independent, non-commercial research project and is not officially affiliated with NVIDIA or Andrej Karpathy.
+
+This licensing notice does not grant additional rights over any third-party material contained in the source corpus. Users are responsible for complying with applicable licenses and rights.
+
 ## Attribution
 
 NeoCorpus builds upon NVIDIA Nemotron-ClimbMix and