What is zethcode?

Zeth Code is a terminal based AI coding assistant. Instead of a web app or a chat window, it runs directly in your terminal and acts as an agent that can read and edit code, run shell commands, work with Git, and remember useful context about your project across sessions. It is a fork of a project called MiMo Code, which is itself built on an earlier project called OpenCode. The author describes Zeth Code as fixing issues found in MiMo Code and adding new features on top, including Windows release builds and its own zeth command. You install it with npm as a global command, or through platform specific installers for Windows, Linux, and macOS, including downloadable executables, a Debian package, and an AppImage. Once installed, running zeth starts an interactive terminal interface inside your project folder. The tool offers a few different agent modes: a default build agent that can actually execute changes, a plan agent that only reads and analyzes code without editing anything, and a compose agent meant for orchestrating more structured, skill driven workflows. It keeps a persistent memory of your project, including rules, architecture notes, session checkpoints, common fixes, and task progress, searchable locally using SQLite full text search. It connects to OpenAI compatible AI model providers, and lets you switch models and providers from within the terminal interface. It also ships with built in support for MCP servers, a protocol for connecting external context and documentation sources, plus tools for inspecting and trimming how much context is being sent to the model. From the command line you can start the interface, run a single one off prompt, manage the memory store, or scaffold a new connector. The source code is released under the MIT license, though use is also subject to a separate use restrictions document in the repository.