TL;DR My coding-interview prep app has a "Generate Visualization" button. Click it on any algorithm problem and Claude Sonnet 4.5 produces a self-contained interactive widget that teaches it — a sliding-window expanding, a two-pointer racing, a DP table filling cell by cell. (That's what the GIF above is showing.) At naive implementation, each click cost me about $0.08. Workable for Pro subscrib