What is cache-guard?
cache-guard is a Claude Code mod by justmytwospence that keeps the prompt cache warm while you are away, asks before a prompt that would re-cache a large conversation, and with Jev (TypeSafe) keeps the context lean: trims large tool output and. It is listed under Security and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | justmytwospence |
| Repository | justmytwospence/claude-cache-guard |
| Popularity | no public popularity data yet |
| Category | Security |
| Security | High risk (36/100) |
| Rank | #3,651 of 5,272 Claude Code mods; #394 in Security |
| License | MIT |
| Last commit | 2026-10-14 |
| Hooks | 11 events |
| Sees | classic hooks, compaction, every prompt, every tool call |
| Draws on | nothing |
Is cache-guard safe to install?
cache-guard scores 36/100 on the MCPMods security check: High risk. Things to review: sends data over the network; starts processes outside the sandbox; writes files or config; reads environment variables; watches every prompt or event. It passed 2 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 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 |
|---|---|
$.clock.after | |
$.clock.now | |
$.command.register | |
$.command.run | drives Claude |
$.env.get | reads env vars |
$.fs.read | reads files |
$.fs.write | writes files |
$.http.fetch | network requests |
$.model.fork | drives Claude |
$.process.run | runs processes |
$.prompt.fill | writes the prompt box |
$.prompt.submit | drives Claude |
$.session.id | |
$.session.messages | reads the transcript |
$.session.model | |
$.session.root | |
$.session.usage | |
$.ui.ask | draws interface |
$.ui.log | draws interface |
How do I install cache-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/justmytwospence/claude-cache-guard claude plugin validate ./claude-cache-guard/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
git clone https://github.com/justmytwospence/claude-cache-guard && claude --plugin-dir ./claude-cache-guard/.
Or ask Claude to set it up
Paste this into Claude Code and it installs cache-guard for you:
Install the "cache-guard" Claude Code mod from https://github.com/justmytwospence/claude-cache-guard. Run claude plugin validate on it first and show me what it can access before you enable it.