What is cache-watch?
cache-watch is a Claude Code mod by ishuagrawal that a band above the prompt that counts down to your prompt cache expiring and shows what it costs your next message. It is listed under Cost & usage and has 2 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | ishuagrawal |
| Repository | ishuagrawal/cache-watch |
| Popularity | 2 GitHub stars |
| Category | Cost & usage |
| Security | Review before installing (76/100) |
| Rank | #1,186 of 5,272 Claude Code mods; #222 in Cost & usage |
| License | MIT |
| Last commit | 2026-10-05 |
| Hooks | 7 events |
| Sees | classic hooks |
| Draws on | AbovePrompt |
Is cache-watch safe to install?
cache-watch scores 76/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; 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 |
|---|---|
| No network access | Pass |
| Starts processes outside the sandbox | Review |
| 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.after | |
$.clock.every | |
$.clock.now | |
$.command.register | |
$.env.get | reads env vars |
$.process.run | runs processes |
$.prompt.read | |
$.session.id | |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.resolve | draws interface |
How do I install cache-watch?
- 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/ishuagrawal/cache-watch claude plugin validate ./cache-watch/plugin
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add ishuagrawal/cache-watch && claude plugin install cache-watch@cache-watch
Or ask Claude to set it up
Paste this into Claude Code and it installs cache-watch for you:
Install the "cache-watch" Claude Code mod from https://github.com/ishuagrawal/cache-watch/tree/main/plugin. Run claude plugin validate on it first and show me what it can access before you enable it.