What is cache-bar?
cache-bar is a Claude Code mod by TheTsungYing that shows prompt cache hit rate and TTL status in Claude Code. It is listed under Cost & usage and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | TheTsungYing |
| Repository | TheTsungYing/claude-cache-bar |
| Popularity | no public popularity data yet |
| Category | Cost & usage |
| Security | Low risk (84/100) |
| Rank | #4,820 of 5,272 Claude Code mods; #956 in Cost & usage |
| License | MIT |
| Last commit | 2026-10-05 |
| Hooks | 12 events |
| Sees | compaction, the system prompt |
| Draws on | AbovePrompt, Pane |
Is cache-bar safe to install?
cache-bar scores 84/100 on the MCPMods security check: Low risk. Things to review: writes files or config. 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 no processes | Pass |
| Writes files or config | Review |
| Doesn't read environment variables | Pass |
| Only sees the events it hooks | Pass |
| 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 |
|---|---|
$.clock.every | |
$.clock.now | |
$.command.register | |
$.config.list | |
$.config.set | changes config |
$.model.fork | drives Claude |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.open | draws interface |
$.ui.panes | draws interface |
$.ui.resolve | draws interface |
$.ui.status | draws interface |
$.ui.toast | draws interface |
How do I install cache-bar?
- 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/TheTsungYing/claude-cache-bar claude plugin validate ./claude-cache-bar/plugins/cache-bar
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add TheTsungYing/claude-cache-bar && claude plugin install cache-bar@claude-cache-bar
Or ask Claude to set it up
Paste this into Claude Code and it installs cache-bar for you:
Install the "cache-bar" Claude Code mod from https://github.com/TheTsungYing/claude-cache-bar/tree/main/plugins/cache-bar. Run claude plugin validate on it first and show me what it can access before you enable it.