Building EIDOLON OS — A Local-First AI Cognitive Operating System The article describes the development of EIDOLON OS, a local-first AI cognitive operating system that processes desktop activity into structured, searchable memory without relying on cloud services or external APIs. It integrates features such as memory, vision, semantic retrieval, CCTV analysis, workflow replay, and local agent actions, all running entirely on the user's machine. The system aims to function as a persistent, contextual cognitive layer for the computer, contrasting with typical stateless cloud chatbots. I’ve been experimenting with a different direction for personal AI: not cloud chatbots, not another wrapper, but a local-first cognitive operating system. So I built EIDOLON OS. An experimental AI system that combines memory, vision, semantic retrieval, CCTV intelligence, workflow replay, and local agent actions into one modular platform. A local-first AI cognitive operating system designed to transform raw desktop activity into structured, searchable memory. UPLOAD SCREENSHOT HERE EIDOLON can analyze uploaded videos and camera feeds using local computer vision pipelines. Features include: UPLOAD SCREENSHOT HERE The system also includes a local action/agent layer capable of: UPLOAD SCREENSHOT HERE Built with: Everything runs locally. No cloud dependency. No telemetry. No external memory APIs. Most AI systems today are stateless chat interfaces. I wanted to explore something different: an AI system that continuously remembers, observes, structures, and retrieves contextual information like a cognitive layer for the machine itself. Still early. But the foundation is becoming real.