A 100% client-side sentiment analyzer that runs a real RoBERTa transformer entirely in the browser via WebAssembly — no backend, no API keys, no data ever leaving the device. Inference is offloaded to a Web Worker so the UI never blocks; results render as a live confidence ring inside a reactive "holographic OS" interface that re-themes by emotion. Model weights download once from the Hugging Face CDN, then every prediction is fully local and private. Stack: Vanilla JS · Vite · Transformers.js (@xenova/transformers) · RoBERTa (ONNX / WASM) · Web Workers · CSS glassmorphism