Show HN: Local-first Gmail and LinkedIn writing copilot built with Claude (github.com)

A developer has announced a local-first browser extension that acts as a writing copilot for Gmail and LinkedIn, utilizing the Claude AI model from Anthropic. This tool allows users to generate emails and LinkedIn posts tailored to their individual context—such as tone and purpose—offering three distinct variants (Short, Standard, Bold) with just one click. The extension features a side panel that integrates directly into Gmail and LinkedIn, minimizing disruptions by avoiding tab-switching, and is designed with a local FastAPI backend, ensuring that user data remains private, with only API calls sent to Claude. This development is significant for the AI/ML community as it emphasizes privacy-first approaches in AI applications while showcasing the potential of generative models in facilitating professional communication. Furthermore, the extension is provider-agnostic, allowing developers to easily switch AI models and supports offline mock modes for UI testing. Although still in a developer beta stage with some rough edges, the release opens avenues for feedback and improvement, inviting collaboration from users eager to refine AI-driven productivity tools.