Ember‑CLI’s **console‑ui** library supplies a shared, plug‑in‑ready UI façade for Node.js tools—handling unified input/output streams, configurable write‑levels, progress spinners, CI‑aware rendering, and mock testing utilities—so that disparate npm packages can coordinate their console interactions reliably. It is intended for maintainers of CLI utilities and libraries that need consistent, configurable console output and interactive prompts without tightly coupling to any single UI implementation.