What is cache-clock?
cache-clock is a Claude Code mod by ray-amjad that a one-line band above the prompt: context used, and a countdown until the prompt cache goes cold. It is listed under Cost & usage and has 72 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | ray-amjad |
| Repository | ray-amjad/awesome-claude-code-function-hooks |
| Popularity | 72 GitHub stars |
| Category | Cost & usage |
| Security | Review before installing (60/100) |
| Rank | #215 of 5,272 Claude Code mods; #35 in Cost & usage |
| License | MIT |
| Last commit | 2026-10-17 |
| Stars this week | +68 |
| Hooks | 10 events |
| Sees | classic hooks, every prompt |
| Draws on | AbovePrompt |
Is cache-clock safe to install?
cache-clock 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 |
|---|---|
$.audio.play | plays audio |
$.clock.every | |
$.clock.now | |
$.command.register | |
$.env.get | reads env vars |
$.fs.read | reads files |
$.process.run | runs processes |
$.prompt.submit | drives Claude |
$.session.id | |
$.session.root | |
$.session.usage | |
$.ui.invalidate | draws interface |
$.ui.resolve | draws interface |
$.ui.toast | draws interface |
How do I install cache-clock?
- 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/ray-amjad/awesome-claude-code-function-hooks claude plugin validate ./awesome-claude-code-function-hooks/plugins/cache-clock
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add ray-amjad/awesome-claude-code-function-hooks && claude plugin install cache-clock@claude-code-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs cache-clock for you:
Install the "cache-clock" Claude Code mod from https://github.com/ray-amjad/awesome-claude-code-function-hooks/tree/main/plugins/cache-clock. Run claude plugin validate on it first and show me what it can access before you enable it.
More from ray-amjad/awesome-claude-code-function-hooks
This repository has at least 9 Claude Code mods on MCPMods.
- decision-tree: When Claude ends a reply with a question, explains the choice in a side pane and lets you explore any option, or your ow (Review before installing)
- diagram-pane: A side pane that pins every diagram Claude draws, keeps a live map of the work, and lets you go into boxes and change th (Review before installing)
- dream-pass: A dreaming pass over Claude's memory folder: merges duplicates, rewrites stale entries, removes dead ones and tidies MEM (Review before installing)
- jev-skill-suggestion: Scores every skill against your prompt with TypeSafe Jev as you type; observe, block or steer skill loading (Review before installing)
- memory-fork: After each turn Haiku decides whether memory needs a change; a tool-less fork of the session drafts it and the mod write (Review before installing)
- prompt-bouncer: Bounces vague prompts before Claude sees them, and suggests the project's own term (Review before installing)
- secret-box: Claude can use a secret without seeing it: a masked box saves keys to .env and gives Claude a placeholder, every key a t (High risk)
- transcript-redactor: Keeps secrets and email addresses out of the session transcript: swaps each one for a stable placeholder on the way in, (Low risk)