What is calendar?
calendar is a Claude Code mod by musingfox that [Experimental] Upcoming Google Calendar events in-session — /cal toggles a band above the prompt with the next 7 days, /cal N for N days (Claude Mod; needs Claude Code 2.1.287+ and the. It is listed under Interface and has 2 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | musingfox |
| Repository | musingfox/cc-plugins |
| Popularity | 2 GitHub stars |
| Category | Interface |
| Security | Review before installing (64/100) |
| Rank | #1,357 of 5,272 Claude Code mods; #533 in Interface |
| License | MIT |
| Last commit | 2026-10-16 |
| Hooks | 3 events |
| Sees | only the events it hooks |
| Draws on | AbovePrompt |
Is calendar safe to install?
calendar scores 64/100 on the MCPMods security check: Review before installing. Things to review: sends data over the network; starts processes outside the sandbox; 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 |
|---|---|
| Sends data over the network | Review |
| Starts processes outside the sandbox | Review |
| Writes no files or config | Pass |
| 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 |
$.mcp.call | calls MCP servers |
$.process.run | runs processes |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.invalidate | draws interface |
$.ui.resolve | draws interface |
How do I install calendar?
- 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/musingfox/cc-plugins claude plugin validate ./cc-plugins/calendar
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add musingfox/cc-plugins && claude plugin install calendar@nick-personal-marketplace
Or ask Claude to set it up
Paste this into Claude Code and it installs calendar for you:
Install the "calendar" Claude Code mod from https://github.com/musingfox/cc-plugins/tree/main/calendar. Run claude plugin validate on it first and show me what it can access before you enable it.
More from musingfox/cc-plugins
This repository has 7 Claude Code mods on MCPMods.
- cf: [Experimental] Contract-driven development pipeline with human-in-the-loop decision gating — agents defined by Context + (Low risk)
- flashcards: [Experimental] Flashcards from your repo's specs, ADRs and vault task cards — /cards build generates a review deck with (Low risk)
- games: [Experimental] Mini games to play while Claude works — /2048, /mines (Minesweeper), /dino (Chrome's offline runner) and (Review before installing)
- mermaid-inline: [Experimental] Every ```mermaid block Claude writes drawn as plain box art in place in the transcript — flowchart, seque (Review before installing)
- obw: Obsidian Workspace — project-scoped vault productivity (capture / notes / PM). Skills own folder layout and templates; / (Review before installing)
- omp-quota: [Experimental] Every omp provider's remaining quota in-session — a /quota band above the prompt, /quota refresh, and a t (Review before installing)