How I Built a Local-First Chrome Extension to Chain ChatGPT, Grok, and Claude

Shifting between LLMs for their unique strengths is standard workflow now, but managing the data state between browser tabs is an absolute nightmare. Here is how I used the Plasmo framework to build a lightweight, local-first context compiler called ContextOS. To guarantee complete privacy and zero server overhead, the entire extension runs serverless: Framework: Plasmo (React + TypeScript + Chrome MV3). Storage: chrome.storage.local handles the entire project matrix. No external databases....