Module format 

Turning answers, questions and errors into styled transcript lines.

Constants

ACCENT

BAD

CHOICE

DIM

NOUL

SCORE

WARN

Functions

answer_lines

Render one answer: the number, the distribution it came from, and what it means.

bar

A probability meter. Eighteen columns is enough to read a distribution at a glance.

bold

color_for

dim

error_lines

Errors are part of the lesson: show the variant, what it means, and what to do.

plain

question_lines

One line per question, the way it will go on the wire.

styled

text_of

JSON strings read better unquoted; everything else stays JSON.