Chrome's Gemini Nano Prompt API: A Step-by-Step Guide

This morning's #1 story on Hacker News (827 points) is a side panel that runs an entire LLM on your laptop with one JavaScript call: await LanguageModel.create() . No server. No API key. No round-trip. The model — Google's 4GB Gemini Nano — is already on your machine; Chrome quietly downloaded it the last time you let it auto-update. 📖 Read the full version with charts and embedded sources on ComputeLeap → The technical name for this is the Prompt API ( official spec , Chrome docs ). It's been