# Tier C: Exact Retraining Data

This directory contains the exact local training inputs used by the released
1M Stage-I and 300K SFT experiments.

```text
stage1_1m/recap_train_1m/   200 WebDataset tar files
sft_300k/                   64 packed parquet shards
```

The Stage-I tar files are sparse on the source filesystem: their allocated
disk usage is smaller than their logical byte size. The manifests record the
logical size and SHA-256 of the complete file stream, which is the relevant
size after download.

Excluded as redundant:

- `extra_800k_chunks`: construction intermediates already represented by the
  final 200 Stage-I tar files.
- raw SFT sources: the released 64 packed parquet shards are the exact inputs
  consumed by the training code.

See the GitHub training configurations and scripts for the original relative
paths and optimizer settings.