What is cache-battery?
cache-battery is a Claude Code mod by korengast that shows the prompt cache as a draining battery above the prompt: 5m or 1h tier, seconds in the last minute, a snowflake when cold. It is listed under Cost & usage and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | korengast |
| Repository | korengast/cache-battery |
| Popularity | no public popularity data yet |
| Category | Cost & usage |
| Security | Low risk (88/100) |
| Rank | #3,727 of 5,272 Claude Code mods; #703 in Cost & usage |
| License | MIT |
| Last commit | 2026-10-07 |
| Hooks | 4 events |
| Sees | classic hooks |
| Draws on | AbovePrompt |
Is cache-battery safe to install?
cache-battery scores 88/100 on the MCPMods security check: Low risk. Things to review: reads environment variables. It passed 7 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 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.every | |
$.clock.now | |
$.env.get | reads env vars |
$.ui.invalidate | draws interface |
$.ui.resolve | draws interface |
How do I install cache-battery?
- 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/korengast/cache-battery claude plugin validate ./cache-battery/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add korengast/cache-battery && claude plugin install cache-battery@cache-battery
Or ask Claude to set it up
Paste this into Claude Code and it installs cache-battery for you:
Install the "cache-battery" Claude Code mod from https://github.com/korengast/cache-battery. Run claude plugin validate on it first and show me what it can access before you enable it.