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Agent skills and plugins

elephant-goldfish-model

by google

A plugin for coding agents such as Claude Code, Codex and Antigravity that helps you write a design specification before any code is written. One agent drafts the spec using your project context, then fresh reviewer agents with no prior conversation check it for gaps and unstated assumptions.

New and promisingUnder two months old. Expect rough edges and fast changes.

View on GitHubProject website

Stars
2k +44 a day, est.
Licence
Apache-2.0
Runs on
Your computer
Setup
Easy
Language
Python
Age
44 days

What you can do with it

  • Brainstorm a feature with your coding agent and save the agreed direction as a concept brief
  • Turn the brief into a design document, reviewing it section by section
  • Have fresh reviewer agents check the design for missing assumptions, unclear requirements and risks, then compare the docs with the current code

Make money with it

A freelance developer could offer a design-first service, delivering reviewed specifications to clients before building their features.

An idea, not financial advice. Check the licence before charging for anything built on it.

Ways a business could use it

  • Plan new product features properly before development, which cuts rework and wasted developer time
  • Document an existing codebase and spot where the written docs have drifted from the code, which helps with handovers and onboarding

Can you use it commercially?

Free to use, change and sell, including in paid products. Keep the copyright notice.

Not legal advice. Read the project's licence file before building a product on it.

Getting it running

Install it with a plugin command in your coding agent's CLI, for example "claude plugin marketplace add google/elephant-goldfish-model" followed by "claude plugin install egm@egm".

Follow the official instructions in the project README.

Things to check

  • Needs a coding agent subscription or API access, which may cost money
  • Reviews need an agent that can create fresh subagents; otherwise the review stops
  • Not an officially supported Google product
  • A review does not replace tests or human judgement

Who's talking about it

Checked 28 Oct 2026. Summary drafted by AI from the project's README.

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