A draft editor with live length feedback, preset and free-text edit instructions with prompt improvement, and an AI edit reviewed as a before/after diff with explicit Accept/Reject (Accept applies exactly the after text). Resolves the Chrome Prompt API when available (zero download) and automatically falls back to a Llama-3.2-1B Transformers.js instruct model behind an explicit download gate, with a truthful provider badge. No model bytes download until an explicit in-block action.
pnpm dlx shadcn@latest add "https://localmode.ai/r/ui/blocks/writing-tools/write.json"