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KletterMix source and mixture-construction data

Candidate pools and mixture buckets used to construct the tokenized Qwen3 and OLMo 3 training corpora. These are provenance artifacts, not a single training mixture.

Branch Contents
fineweb2-de-candidates FineWeb2-deu_Latn candidate pool used to construct the 15% and 20% replacement mixtures.
germanweb-candidates GermanWeb candidate pool used to construct the 15% and 20% replacement mixtures.
olmo3-mixture-buckets OLMo 3-tokenized ClimbMix/KletterMix mixture buckets, including the 80% ClimbMix base and incremental KletterMix buckets.

The branch names are part of the reproducibility interface. The private KletterMix_Ablations repository records the local source paths, exact branch commits, and the submodule mapping. The tokenized data can be consumed by Megatron using the .bin/.idx prefix in the selected branch.

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