What problem does it solve? Creating or improving a single interactive explainer for a textbook chapter normally requires running the entire chapter pipeline; this Skill isolates one explainer so it can be storyboarded, built, reviewed, embedded, and committed on its own. ## Core Features & Use Cases - Targeted explainer builds: Build or rebuild one explainer by chapter number and slug, with an optional verbatim improvement request passed to the builder. - New explainer workflow: For new ideas, it coordinates curation, storyboard design, mirrored function implementation with tests, and notebook embedding. - Quality gates: Runs lint and screenshot checks via tools/viz_lint.py and tools/shot.py, then a reviewer pass with up to two fix rounds before committing. - Use Case: Run /build-viz 7 dispersion_relation "make the particle orbits bigger on phones" to iterate on a single explainer without touching the rest of chapter 7. ## Quick Start Ask the assistant to run /build-viz with a chapter number, an explainer slug or the word new, and an optional change request, for example to rebuild the chapter 7 dispersion relation explainer with larger particle orbits on phones.