What is grimoire?
grimoire is a Claude Code mod by mephistopheles4 that a spellbook of agent skills for AI. Cast wisely. Four skills: eagle-eye, which lays coupled decisions out as a morphological box and renders one self-contained page that reads any. It is listed under Cost & usage and has 1 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | mephistopheles4 |
| Repository | mephistopheles4/grimoire |
| Popularity | 1 GitHub stars |
| Category | Cost & usage |
| Security | High risk (52/100) |
| Rank | #1,970 of 5,272 Claude Code mods; #347 in Cost & usage |
| License | MIT |
| Last commit | 2026-10-18 |
| Hooks | 13 events |
| Sees | classic hooks, mcp__grimoire__set_roster calls |
| Draws on | Pane |
Is grimoire safe to install?
grimoire scores 52/100 on the MCPMods security check: High risk. Things to review: sends data over the network; starts processes outside the sandbox; writes files or config; reads environment variables. 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 |
|---|---|
| Sends data over the network | Review |
| Starts processes outside the sandbox | Review |
| Writes files or config | Review |
| 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 |
$.fs.list | reads files |
$.fs.read | reads files |
$.fs.stat | reads files |
$.fs.write | writes files |
$.mcp.call | calls MCP servers |
$.process.run | runs processes |
$.session.id | |
$.session.surfaces | |
$.session.usage | |
$.state.get | |
$.state.set | |
$.tool.check | |
$.tool.list | |
$.tool.register | drives Claude |
$.ui.open | draws interface |
$.ui.panes | draws interface |
$.ui.resolve | draws interface |
$.ui.toast | draws interface |
How do I install grimoire?
- 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/mephistopheles4/grimoire claude plugin validate ./grimoire/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add mephistopheles4/grimoire && claude plugin install grimoire@mephistopheles4
Or ask Claude to set it up
Paste this into Claude Code and it installs grimoire for you:
Install the "grimoire" Claude Code mod from https://github.com/mephistopheles4/grimoire. Run claude plugin validate on it first and show me what it can access before you enable it.