What is clef-guard?
clef-guard is a Claude Code mod by williamchen0606 that has Cloudflare's Clef decision model judge each Bash, Write, Edit and WebFetch call (risk, kind of risk, whether it is read-only, whether it fits your request), asks you itself before. It is listed under Security and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | williamchen0606 |
| Repository | williamchen0606/claude-mods |
| Popularity | no public popularity data yet |
| Category | Security |
| Security | Review before installing (76/100) |
| Rank | #5,130 of 5,272 Claude Code mods; #530 in Security |
| License | MIT |
| Last commit | 2026-10-10 |
| Hooks | 1 events |
| Sees | only the events it hooks |
| Draws on | nothing |
Is clef-guard safe to install?
clef-guard scores 76/100 on the MCPMods security check: Review before installing. Things to review: sends data over the network; reads environment variables. It passed 6 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 |
|---|---|
| Sends data over the network | Review |
| Starts no processes | Pass |
| 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 |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.clock.now | |
$.clock.sleep | |
$.env.get | reads env vars |
$.http.fetch | network requests |
$.session.messages | reads the transcript |
$.session.root | |
$.ui.ask | draws interface |
$.ui.status | draws interface |
How do I install clef-guard?
- 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/williamchen0606/claude-mods claude plugin validate ./claude-mods/mods/clef-guard
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add williamchen0606/claude-mods && claude plugin install clef-guard@claude-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs clef-guard for you:
Install the "clef-guard" Claude Code mod from https://github.com/williamchen0606/claude-mods/tree/main/mods/clef-guard. Run claude plugin validate on it first and show me what it can access before you enable it.
More from williamchen0606/claude-mods
This repository has 4 Claude Code mods on MCPMods.
- clef-verify: Before Claude ends a turn that changed files, has Cloudflare's Clef decision model check that the work is shown to be do (Review before installing)
- desktop-statusline: A status line for the Claude desktop app: 5-hour and weekly limits with progress bars, context, cost, and how long the 5 (Low risk)
- image-preview: Preview images pasted into the prompt box, above the prompt, before you send them, and annotate them on macOS. (Low risk)