Fine-tune of gemma-3-1b-it that turns a natural-language chart request into a complete, runnable D3 v7 HTML page. Trained on a curated 540-example instruction set across 15 chart families (bar, line, area, scatter, pie, donut, stacked/grouped bar, histogram, heatmap, treemap, force-directed graph, etc.). Note: base model chosen as a stable text-only Gemma while Gemma 3n E2B fine-tuning tooling stabilizes upstream; the pipeline is model-agnostic.