What is prompt-cache-control?
prompt-cache-control is a Claude Code mod by Nasrallah-Adel that prompt-cache meter above the Claude Code prompt: how many tokens each request read from, wrote to and sent past the cache, a live countdown to the cache's expiry, and what to do about it. It is listed under Cost & usage and has 1 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | Nasrallah-Adel |
| Repository | Nasrallah-Adel/claude-prompt-cache-control |
| Popularity | 1 GitHub stars |
| Category | Cost & usage |
| Security | Low risk (80/100) |
| Rank | #1,998 of 5,272 Claude Code mods; #354 in Cost & usage |
| Last commit | 2026-10-08 |
| Hooks | 7 events |
| Sees | only the events it hooks |
| Draws on | AbovePrompt, Pane |
Is prompt-cache-control safe to install?
prompt-cache-control scores 80/100 on the MCPMods security check: Low risk. Things to review: reads environment variables. It passed 5 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 |
| Drives Claude (model calls, prompts) | Note |
| Passes claude plugin validate | Pass |
| No license detected | Note |
API calls in its code
| Call | What it means |
|---|---|
$.clock.every | |
$.command.register | |
$.command.run | drives Claude |
$.env.get | reads env vars |
$.fs.exists | reads files |
$.fs.list | reads files |
$.fs.read | reads files |
$.model.complete | drives Claude |
$.prompt.fill | writes the prompt box |
$.prompt.submit | drives Claude |
$.session.cwd | |
$.session.id | |
$.session.usage | |
$.ui.close | draws interface |
$.ui.invalidate | draws interface |
$.ui.log | draws interface |
$.ui.open | draws interface |
$.ui.resolve | draws interface |
$.ui.status | draws interface |
$.ui.toast | draws interface |
How do I install prompt-cache-control?
- 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/Nasrallah-Adel/claude-prompt-cache-control claude plugin validate ./claude-prompt-cache-control/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add Nasrallah-Adel/claude-prompt-cache-control && claude plugin install prompt-cache-control@nasrallah-cache-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs prompt-cache-control for you:
Install the "prompt-cache-control" Claude Code mod from https://github.com/Nasrallah-Adel/claude-prompt-cache-control. Run claude plugin validate on it first and show me what it can access before you enable it.