Last week, I worked on the first prototype of Redact — a macOS app that prevents developers from accidentally pasting secrets into ChatGPT, Slack, or any external service. The concept is simple: – intercept the clipboard– run it through a local AI– block if sensitive This post documents the engineering challenges I faced and how I solved them using Swift, Apple’s MLX framework, and a lot of trial and error. The Architecture Redact is built as a native macOS app with three core components: The key constraint: Everything runs locally so no cloud Continue reading