A LoRA adapter that teaches Altworld/Hemmingway-1 (a 27B Qwen3.5 GDN model) to reason in the Tree-of-Thought "reasoning-steps → final justified answer" style of the codex5.5ToT dataset. - Altworld/Hemmingway-1 — a 27B-parameter Qwen35ForCausalLM (Qwen3.5 / GDN architecture): 48 linear-attention layers + 16 full-attention layers, 64 layers total, plus an MTP (multi-token-prediction) head. BF16 ≈ 54.6 GB. - AmelieSchreiber/codex5.5ToT — 3,890 high-quality reasoning records across 10 domains (math, physics, CS/algorithms, chemistry, …). Each record is a [system, user, assistant] chat where the assistant response is a reasoning tree: it explores branches, compares alternatives, and ends with a…