About this Skill
Maps a chosen subtree and documents component interfaces, invariants and side effects bottom-up. It asks before expanding to more than 15 discovered directories and does not modify functional code.
Why we picked it
Part of the complete EGM plugin. Use this workflow independently or with the other EGM skills.
What it helps with
- Create or update architecture README files across an existing codebase.
Install the whole plugin
Individual entries share a plugin: use the appropriate upstream install command, then start a new session.
| Command | What it helps with |
|---|---|
codex plugin marketplace add google/elephant-goldfish-model && codex plugin add egm@egm | Install the complete plugin for Codex. |
claude plugin marketplace add google/elephant-goldfish-model && claude plugin install egm@egm | Install the complete plugin for Claude Code. |
agy plugin install https://github.com/google/elephant-goldfish-model | Install the complete plugin for Antigravity. |
Upstream repository and installationSupported environments and limitations
Before you use it
- Install the complete EGM plugin; its Skills depend on shared reviewer personas, documentation and standards. Restart the agent session after installation.
- Brainstorm and review workflows require fresh-context subagents. If the host cannot create them, those reviews stop.
Supported agents
Sources & references
Original sources are linked below. Practical starting points are editorial suggestions from SkillHey.



