What is exo?
exo is a Claude Code mod by pepperonas that an exoskeleton for Claude Code: guards against costly mistakes, a cockpit while working, a recap at the end and a few extras. It is listed under Security and has 2 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | pepperonas |
| Repository | pepperonas/exo |
| Popularity | 2 GitHub stars |
| Category | Security |
| Security | High risk (48/100) |
| Rank | #1,376 of 5,272 Claude Code mods; #151 in Security |
| License | MIT |
| Last commit | 2026-10-06 |
| Hooks | 9 events |
| Sees | every prompt, every tool call |
| Draws on | Pane, Spinner, PromptHint, AbovePrompt |
Is exo safe to install?
exo scores 48/100 on the MCPMods security check: High risk. Things to review: starts processes outside the sandbox; writes files or config; reads environment variables; watches every prompt or event. It passed 3 of 8 checks.
Mod footprints come from claude plugin validate, which lists every event a mod hooks and every API call it makes without running it.
| Check | Result |
|---|---|
| No network access | Pass |
| Starts processes outside the sandbox | Review |
| Writes files or config | Review |
| Reads environment variables | Review |
| Watches every prompt or event | Review |
| Drives Claude (model calls, prompts) | Note |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.audio.play | plays audio |
$.clock.after | |
$.clock.every | |
$.clock.now | |
$.command.list | |
$.command.register | |
$.config.list | |
$.env.get | reads env vars |
$.fs.exists | reads files |
$.fs.list | reads files |
$.fs.read | reads files |
$.fs.stat | reads files |
$.fs.write | writes files |
$.model.complete | drives Claude |
$.process.run | runs processes |
$.process.spawn | |
$.prompt.fill | writes the prompt box |
$.prompt.read | |
$.session.cwd | |
$.session.id | |
$.session.messages | reads the transcript |
$.session.repo | |
$.session.usage | |
$.state.get | |
$.state.set | |
$.store.delete | keeps its own state |
$.store.get | keeps its own state |
$.store.keys | keeps its own state |
$.store.set | keeps its own state |
$.ui.ask | draws interface |
$.ui.close | draws interface |
$.ui.copy | draws interface |
$.ui.invalidate | draws interface |
$.ui.log | draws interface |
$.ui.open | draws interface |
$.ui.resolve | draws interface |
$.ui.toast | draws interface |
How do I install exo?
- Check your Claude Code version. Mods need Claude Code 2.1.287 or later and are on by default.
claude --version
- Read its footprint. This lists every event it hooks and every API call it makes, without running it.
git clone https://github.com/pepperonas/exo claude plugin validate ./exo/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add pepperonas/exo && claude plugin install exo@pepperonas-exo
Or ask Claude to set it up
Paste this into Claude Code and it installs exo for you:
Install the "exo" Claude Code mod from https://github.com/pepperonas/exo. Run claude plugin validate on it first and show me what it can access before you enable it.