What is zsh-safe?
zsh-safe is a Claude Code mod by HolyGrail that lets Bash commands written for bash run under zsh: unmatched globs, leading =, and a missing timeout. It is listed under Interface and has 19 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | HolyGrail |
| Repository | HolyGrail/claude-mods |
| Popularity | 19 GitHub stars |
| Category | Interface |
| Security | Review before installing (72/100) |
| Rank | #339 of 5,272 Claude Code mods; #135 in Interface |
| Last commit | 2026-10-12 |
| Stars this week | +2 |
| Hooks | 2 events |
| Sees | Bash calls |
| Draws on | nothing |
Is zsh-safe safe to install?
zsh-safe scores 72/100 on the MCPMods security check: Review before installing. Things to review: writes files or config; 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 no processes | Pass |
| Writes files or config | Review |
| 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 |
|---|---|
$.env.get | reads env vars |
$.env.set | sets env vars |
How do I install zsh-safe?
- 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/HolyGrail/claude-mods claude plugin validate ./claude-mods/plugins/zsh-safe
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add HolyGrail/claude-mods && claude plugin install zsh-safe@claude-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs zsh-safe for you:
Install the "zsh-safe" Claude Code mod from https://github.com/HolyGrail/claude-mods/tree/main/plugins/zsh-safe. Run claude plugin validate on it first and show me what it can access before you enable it.
More from HolyGrail/claude-mods
This repository has 5 Claude Code mods on MCPMods.
- cache-meter: Gauges how long the conversation's prompt cache stays warm, its hit ratio and misses, and what the next message re-cache (Low risk)
- notice-board: Shares notices with every session in the same repository, or on the machine (Low risk)
- pr-relay: Watches the session's pull request and wakes the session when it is merged or Codex reviews it (High risk)
- usage-meter: Shows context, 5-hour, weekly and per-model weekly limit usage above the prompt (Low risk)