What is cache-keeper?
cache-keeper is a Claude Code mod by nateherkai that keeps a big chat's prompt cache warm, warns before an expensive cold restart, shows every local chat on one board (/board), and hands a chat off to a fresh one (/handoff). It is listed under Cost & usage and has 37 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | nateherkai |
| Repository | nateherkai/claude-code-mods |
| Popularity | 37 GitHub stars |
| Category | Cost & usage |
| Security | Review before installing (60/100) |
| Rank | #250 of 5,272 Claude Code mods; #40 in Cost & usage |
| License | MIT |
| Last commit | 2026-10-02 |
| Stars this week | +18 |
| Hooks | 14 events |
| Sees | classic hooks, compaction, every prompt, every tool call |
| Draws on | AbovePrompt, Pane, SessionMode |
Is cache-keeper safe to install?
cache-keeper scores 60/100 on the MCPMods security check: Review before installing. Things to review: writes files or config; 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 no processes | Pass |
| 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 |
|---|---|
$.agent.list | |
$.clock.after | |
$.clock.every | |
$.clock.now | |
$.command.list | |
$.command.register | |
$.command.run | drives Claude |
$.env.get | reads env vars |
$.fs.exists | reads files |
$.fs.read | reads files |
$.fs.write | writes files |
$.model.fork | drives Claude |
$.prompt.fill | writes the prompt box |
$.prompt.submit | drives Claude |
$.session.compact | drives Claude |
$.session.cwd | |
$.session.id | |
$.session.model | |
$.session.surface | |
$.session.usage | |
$.store.delete | keeps its own state |
$.store.get | keeps its own state |
$.store.keys | keeps its own state |
$.store.set | keeps its own state |
$.ui.ask | draws interface |
$.ui.invalidate | draws interface |
$.ui.open | draws interface |
$.ui.resolve | draws interface |
$.ui.toast | draws interface |
How do I install cache-keeper?
- 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/nateherkai/claude-code-mods claude plugin validate ./claude-code-mods/cache-keeper
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add nateherkai/claude-code-mods && claude plugin install cache-keeper@nateherk-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs cache-keeper for you:
Install the "cache-keeper" Claude Code mod from https://github.com/nateherkai/claude-code-mods/tree/main/cache-keeper. Run claude plugin validate on it first and show me what it can access before you enable it.
More from nateherkai/claude-code-mods
This repository has 4 Claude Code mods on MCPMods.
- collision-guard: Asks before Claude edits a file another open chat changed in the last 30 minutes: Proceed, Move to a worktree, or Cancel (High risk)
- goal-meter: A progress bar for /goal built from Claude's own task plan: tasks done out of the plan, elapsed time, an ETA at the goal (High risk)
- recording-mode: /rec before you record: masks keys, personal details, and business figures on screen and keeps private files closed (/re (Review before installing)