Instruction-tuning dataset with chain-of-thought, merged and deduplicated from multiple public reasoning datasets. Every row is JSON with: - instruction - the user/task prompt - thought - reasoning wrapped in tags (always present) - response - the final answer - hasthinking - always true - sourcedataset - provenance of the row in row order. Sources include OpenThoughts3-1.2M, Mixture-of-Thoughts, Infinity-Instruct and Nemotron-Post-Training-Dataset (v1 and v2). Deduplication is exact full-line (md5), applied globally across all sources. - All model-identity references were normalized to "Speed by SKT AI LABS Private Limited". - A small fraction of rows (mostly from one legacy source) carry…