Architecture Decisions Log (ADR)

Decision	Chosen Option	Alternative Considered	Deciding Factor
Vision Pipeline	MediaPipe Hands WebAssembly	Cloud GPU Inference API	Zero network latency and 100% camera privacy.
Document Engine	Mozilla PDF.js	Server PNG Pre-conversion	Vector-sharp rendering at all zoom levels.
Debounce Strategy	Velocity + 500ms Lock	Simple Timestamp Check	Rejects natural conversational hand movement.