docker-copyedit is a CLI tool for editing Docker image metadata, including removing/adding volumes, ports, environment variables, labels, and modifying image configuration like user, workdir, entrypoint, and cmd. The tool works by saving a Docker image to a tarball, extracting and modifying the metadata JSON files (manifest.json and config files), then re-packaging and loading the modified image. It supports both Docker and Podman via command-line flags. The architecture is a monolithic Python application with a clear separation between the CLI wrapper and core implementation. Key functions include parsing Docker image names, executing shell commands with proper error handling, and a custom command-line DSL for specifying image modifications.