Choices

uform_text_choose scores each text’s legal choices, one byte each, through one forward of the byte decoder. The call appends the mask byte to every text, and a text longer than the model’s context loses its head, never its end. Each item’s probabilities are a softmax over its own choices alone, at the calibrated inverse temperature of its temperature_groups entry, and land in the arena as one f32 tape in choices order. A model whose choice_temperature_groups is zero carries no byte decoder and reports uform_status_unsupported_k.

uform_tape_view_t probabilities = {0};
uform_text_choose(&(uform_text_choose_t){
    .model = model, .executor = executor, .outcome = &outcome, .count = n,
    .texts = {bytes, offsets, uform_scalar_u8_k}, .choices = {letters, letter_offsets, uform_scalar_u8_k},
    .probabilities = &probabilities, .arena = arena});

A checkpoint stores one inverse temperature per question type as choices.inverse_temperatures, and one without them chooses at an inverse temperature of one. uform_eval <checkpoint> --calibrate <choices.jsonl> --output <calibrated.safetensors> fits them on held-out choices, prints each group’s negative log-likelihood and the top-choice calibration error before and after, and writes the calibrated copy.