Semiotic is a React‑based data‑visualization library that offers a wide range of charts—including line, bar, and scatter plots, plus network graphs, streaming realtime charts, geographic maps, and coordinated dashboards—through a consistent, type‑safe API. It is built especially for AI‑assisted development, providing machine‑readable prop schemas, validation tools, and an MCP server so LLMs can generate correct visualizations with minimal trial‑and‑error. The library targets front‑end developers and data‑science teams needing advanced, interactive visualizations that go beyond basic charting libraries.