Claude Code mod
playpen
The sessions you are working in right now as small cards above the prompt: a status lamp, a short label, what just happened, and one press to answer or jump there.
Install
/plugin marketplace add KytioisaCat/playpen
/plugin install playpen@kytioisacatMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- Unknown
- Sees
- every prompt, classic hooks, the system prompt, AskUserQuestion calls, every tool call
- Draws in
AbovePrompt- Hooks
session.startcommand.runprompt.submitturn.startprompt.suggestclassic.PermissionRequesttool.checkclassic.Notificationturn.stepprompt.contextclassic.PostModelSwitchtool.callsession.receiveclassic.Stopturn.completesession.endui.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
- KytioisaCat/playpen
- Folder
.- Marketplace
kytioisacat- Author
- Joel Rönnqvist
- License
- MIT
- Last updated
- 23 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is playpen?
The sessions you are working in right now as small cards above the prompt: a status lamp, a short label, what just happened, and one press to answer or jump there. It is a mod for Claude Code, from KytioisaCat/playpen on GitHub.
What can the playpen mod access?
Its reach could not be worked out from its code. It sees every prompt, classic hooks, the system prompt, AskUserQuestion calls, every tool call. It draws in AbovePrompt. Like any mod, it runs with your permissions.
How do I install playpen?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add KytioisaCat/playpen and then /plugin install playpen@kytioisacat.
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