Interactive component library

Deterministic visual widgets — pure SVG, no LLM, instant. Question numbers plug straight in.

Fraction bar — “What fraction is shaded?” (3/4)

4 equal parts

Number line — a sequence at a glance

Place-value grid — the value of each digit (3,742)

Thousands3

Hundreds7

Tens4

Ones2

Venn diagram — sets and overlaps

LLM-authored animation (2.2) — dynamic cases, cached after first render

When a fixed widget can’t cover every case, the LLM emits a compact JSON keyframe recipe. First render is authored by Haiku (≤3s); every repeat is instant from cache.