google/elephant-goldfish-model

<p align="center"> <a href="https://egm.dev"><img src="docs/assets/readme-header.svg" width="480" height="116" alt="Elephant-Goldfish Model"></a> </p> <p align="center">Design with an elephant. Review with a goldfish.</p> <p align="center"> <a href="#install">Install</a> &ensp;·&ensp; <a href="#try-your-first-design">Quickstart</a> &ensp;·&ensp; <a href="docs/getting_started.md">Documentation</a> &ensp;·&ensp; <a href="https://egm.dev">Website</a> </p> <br>

Thousands of Google engineers use EGM, an open-source plugin, to draft specs with deep-context agents and stress-test them with zero-context subagents before writing code.

Elephant holds your project context and drafts the specification. Goldfish reviewers examine the draft and referenced source material without the earlier conversation, helping expose unstated assumptions and blind spots. You make the architectural trade-offs and approve the specification before implementing.

Use it when a feature needs design decisions before implementation. For a small, clear bug fix, use your normal coding workflow.

Install

Choose your coding agent. Install the complete plugin so its skills can read the reviewer prompts and document standards.

Antigravity CLI

agy plugin install https://github.com/google/elephant-goldfish-model

For the Antigravity App and Antigravity for IDEs (Visual Studio Code extension), run /plugin or see the installation instructions.

Claude Code

claude plugin marketplace add google/elephant-goldfish-model
claude plugin install egm@egm

Codex

codex plugin marketplace add google/elephant-goldfish-model
codex plugin add egm@egm

Start a new session after installation. For Claude Cowork and ChatGPT Work, see the setup guide.

Try your first design

Open your project in your coding agent and choose a feature that needs design d