What is nyan-cat?
nyan-cat is a Claude Code mod by besanek that nyan Cat flies with its rainbow above the prompt while Claude works. /nyan changes its size or turns it off. It is listed under Interface and has 1 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | besanek |
| Repository | besanek/claude-nyan-cat |
| Popularity | 1 GitHub stars |
| Category | Interface |
| Security | Low risk (100/100) |
| Rank | #1,691 of 5,272 Claude Code mods; #685 in Interface |
| License | MIT |
| Last commit | 2026-10-05 |
| Hooks | 3 events |
| Sees | only the events it hooks |
| Draws on | AbovePrompt |
Is nyan-cat safe to install?
nyan-cat scores 100/100 on the MCPMods security check: Low risk. No checks raised a concern. It passed 8 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 |
| Doesn't read environment variables | Pass |
| 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 | |
$.command.register | |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.blit | draws interface |
$.ui.invalidate | draws interface |
$.ui.resolve | draws interface |
How do I install nyan-cat?
- 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/besanek/claude-nyan-cat claude plugin validate ./claude-nyan-cat/plugins/nyan-cat
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add besanek/claude-nyan-cat && claude plugin install nyan-cat@claude-nyan-cat
Or ask Claude to set it up
Paste this into Claude Code and it installs nyan-cat for you:
Install the "nyan-cat" Claude Code mod from https://github.com/besanek/claude-nyan-cat/tree/main/plugins/nyan-cat. Run claude plugin validate on it first and show me what it can access before you enable it.