Jeeves. Reasoning improves Jev-like decision models

A reasoning Jev-style classifier with a diffusion drafter, trained with SFT and CISPO. Inspired by Kev. - A 9B Jev-like model (Qwen3.5-9B, LoRA, pointer head) that thinks before it decides, with a block-4 diffusion drafter and the full training code and train/dev/test data. - Beats Kev-9B and Jev on test data it was never trained on (0.889 vs 0.822 and 0.857) and on JevBench's public tiers (0.935 ...