GoKawiilGoKawiil explains single-pass 'system one' decision models using Qwen3-1.7B
A technical write-up describes how constrained decoding can turn a standard language model into a fast 'decision model' that picks from a fixed set of options (A through E) in a single forward pass, rather than generating output token by token as with structured JSON output. The piece includes example code using Qwen/Qwen3-1.7B to mask the vocabulary down to allowed answer tokens and select the highest-probability one.