What is cache-keepalive?
cache-keepalive is a Claude Code mod by federbenjamin that keeps an idle session's prompt cache warm with a short prompt 2 min before it expires; capped per model, the last one a handoff. It is listed under Cost & usage and has 3 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | federbenjamin |
| Repository | federbenjamin/cache-keepalive |
| Popularity | 3 GitHub stars |
| Category | Cost & usage |
| Security | Review before installing (60/100) |
| Rank | #796 of 5,272 Claude Code mods; #154 in Cost & usage |
| License | MIT |
| Last commit | 2026-10-08 |
| Hooks | 7 events |
| Sees | every prompt |
| Draws on | nothing |
Is cache-keepalive safe to install?
cache-keepalive scores 60/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; reads environment variables; watches every prompt or event. It passed 4 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 |
| 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.every | |
$.clock.now | |
$.command.register | |
$.env.get | reads env vars |
$.process.run | runs processes |
$.prompt.submit | drives Claude |
$.state.get | |
$.state.set | |
$.ui.status | draws interface |
How do I install cache-keepalive?
- 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/federbenjamin/cache-keepalive claude plugin validate ./cache-keepalive/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add federbenjamin/cache-keepalive && claude plugin install cache-keepalive@cache-keepalive
Or ask Claude to set it up
Paste this into Claude Code and it installs cache-keepalive for you:
Install the "cache-keepalive" Claude Code mod from https://github.com/federbenjamin/cache-keepalive. Run claude plugin validate on it first and show me what it can access before you enable it.