macOS Calendar & Reminders

Native Swift implementation that talks directly to macOS EventKit, giving you full control over Calendar and Reminders without touching any web APIs. Twenty-four tools split across calendars, events, and reminders with real depth: batch operations, conflict detection, duplicate prevention, and hashtag-based task organization. Works with any calendar source your Mac sees (iCloud, Google, Exchange). Includes CLI mode for shell scripts and launchd jobs alongside standard MCP protocol support. The plugin variant adds slash commands and a PreToolUse hook that catches weekday mismatches before they hit the API. If you need to wire calendar operations into Claude on macOS and want local-first access with no OAuth dance, this is the one.