An AI coding agent for your terminal.

A fast, opinionated terminal coding agent, built for how you actually work in the shell. Any OpenAI-compatible model.

zeta reading Install.astro and index.astro, running read and edit tool calls in build mode
§01

modes

Press shift+tab to cycle without leaving the prompt.

build

Implements with tools. Reads files, edits code, greps the tree. You watch every call as it happens.

ask

Q&A with read-only tools. Interrogate the codebase without letting it touch a byte.

plan

Plans with read-only tools. Explores first, then hands you a sequence of steps to approve.

§02

shortcuts

input

  • enter

    send message

  • shifttab

    cycle build / ask / plan

  • shiftenterorctrlj

    insert newline

  • escorctrlc

    quit

  • mouseorpguppgdn

    scroll transcript

commands

  • /

    command autocomplete

  • /clear

    start a new session

  • /resume

    pick a previous session

  • /model

    switch model

§03

config

zeta ships with no configuration by default. Add openai-compatible model endpoints as shown below.

{  "model": "deepseek/deepseek-v4-flash",  "providers": [{    "id": "deepseek",    "name": "DeepSeek",    "base_url": "https://api.deepseek.com/v1",    "api_key": "sk-…",    "models": {      "deepseek-v4-flash": {        "name": "V4 Flash",        "context_window": 1000000      }    }  }]}

lives at ~/.zeta/config.json. one file, any providers: deepseek, kimi, xai, openai, a local server.