Datasets:
pretty_name: Stage 3 Final Mixture — 50% CoT Compression
license: apache-2.0
task_categories:
- text-generation
Stage 3 Final Mixture — 50% CoT Compression
This is a deterministic capability-preserving rewrite of
leonli66/stage3-final-mixture for LCLM Stage-3 post-training.
Only the reasoning_data and dolci_think subsets change. Their
compression_prompt is the ordinary prompt. A deterministic 50% arm keeps
the complete assistant target as ordinary SFT; the other arm wraps the inferred
reasoning prefix in <|memory_start|>...<|memory_end|> while keeping the final
answer trainable. All non-reasoning rows are unchanged.
Counts
- Total rows: 20,326,114
- Reasoning rows: 5,407,421
- Assigned CoT compression: 2,702,448 (49.98%)
- Assigned ordinary uncompressed SFT: 2,704,973 (50.02%)
- Effective CoT-compressed rows: 2,698,545
- Compression-assigned rows too short to split: 3,903
Boundary rules
Priority is: explicit analysis tags; final-answer markers; a final boxed answer;
an answer line; the final balanced fenced block; a GSM-style final #### line;
then a fallback that keeps the final 128
Qwen/Qwen3-4B-Instruct-2507 tokens uncompressed.
The transformation is text-preserving: deleting the two LCLM memory tags from every rewritten target reconstructs the original target exactly. All 2,033 Parquet shards were validated against the source.