Claude Code mod
vivarium
Shows each subagent as a pixel Clawd in a strip above the prompt: walking while it works, asleep when it finishes, sized by model. Click one for its details.
Install
/plugin marketplace add claytonmgravatt/claude-mods
/plugin install vivarium@claude-modsMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- L1Reads: reads mod state, draws
- Sees
- subagent spawns, every tool call
- Draws in
AbovePrompt- Hooks
session.startcommand.runagent.spawntool.callturn.completeui.messageui.render
From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.
How Claude Code mods work
- A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
- It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
- Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
- Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Details
- Repository
- claytonmgravatt/claude-mods
- Folder
plugins/vivarium- Marketplace
claude-mods- Author
- Clayton Gravatt
- Last updated
- 6 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is vivarium?
Shows each subagent as a pixel Clawd in a strip above the prompt: walking while it works, asleep when it finishes, sized by model. Click one for its details. It is a mod for Claude Code, from claytonmgravatt/claude-mods on GitHub.
What can the vivarium mod access?
Its widest reach is "reads" (reads mod state, draws). It sees subagent spawns, every tool call. It draws in AbovePrompt. Like any mod, it runs with your permissions.
How do I install vivarium?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add claytonmgravatt/claude-mods and then /plugin install vivarium@claude-mods.
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