Container Diet is an AI-powered command-line tool that analyzes Docker images and Dockerfiles and returns context-aware, actionable optimization recommendations to reduce image size. The tool examines image contents and the associated Dockerfile to highlight inefficiencies, excess packages, and opportunities such as trimming dependencies or adopting multi-stage builds. Recommendations are presented as practical guidance developers can apply to shrink images, speed up builds, and reduce deployment and storage costs. Packaged as a lightweight, open-source CLI, Container Diet is intended to fit into developer workflows and CI processes to prevent image bloat.