What is guardrails?
guardrails is a Claude Code mod by Stoica-Mihai that blocks the Bash commands your own rules file names, and shows every block in /blocked. Ships no rules. It is listed under Security and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | Stoica-Mihai |
| Repository | Stoica-Mihai/claude-mods |
| Popularity | no public popularity data yet |
| Category | Security |
| Security | Review before installing (72/100) |
| Rank | #4,730 of 5,272 Claude Code mods; #494 in Security |
| Last commit | 2026-10-08 |
| Hooks | 4 events |
| Sees | Bash calls |
| Draws on | Pane |
Is guardrails safe to install?
guardrails scores 72/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; reads environment variables. It passed 5 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 no files or config | Pass |
| Reads environment variables | Review |
| Only sees the events it hooks | Pass |
| Doesn't drive Claude | Pass |
| Passes claude plugin validate | Pass |
| No license detected | Note |
API calls in its code
| Call | What it means |
|---|---|
$.clock.now | |
$.command.register | |
$.env.get | reads env vars |
$.fs.read | reads files |
$.fs.stat | reads files |
$.process.run | runs processes |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.open | draws interface |
$.ui.resolve | draws interface |
$.ui.toast | draws interface |
How do I install guardrails?
- 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/Stoica-Mihai/claude-mods claude plugin validate ./claude-mods/plugins/guardrails
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add Stoica-Mihai/claude-mods && claude plugin install guardrails@claude-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs guardrails for you:
Install the "guardrails" Claude Code mod from https://github.com/Stoica-Mihai/claude-mods/tree/main/plugins/guardrails. Run claude plugin validate on it first and show me what it can access before you enable it.
More from Stoica-Mihai/claude-mods
This repository has 2 Claude Code mods on MCPMods.
- leftovers: Tracks the processes Claude's Bash calls leave running, and has Claude close or explain them. /leftovers lists them. (Review before installing)