80% TULU3 replay / 20% agentic tool-calling difficult-advice, rendered for Qwen3.6-27B with a
block on every assistant turn — empty where that turn carries no reasoning.
This supersedes the tool-calling mixture used by the arm retracted on 2026-08-03. That run had two
defects: the loss was computed over the full sequence instead of being masked to assistant tokens,
and think blocks were not guaranteed on every… See the full description on the dataset page: https://huggingface.co/datasets/LASR-Callum/2026-08-03-tulu-toolcall-80-20-mixture.
