Calendar Markdown + Google Sync Skill

Use this skill to query/update the local markdown-backed calendar safely and sync it with Google Calendar.

Source of Truth

• File: calendar.md
• Authoritative section: ## Event Records (fenced event YAML blocks)
• Human summary section: ## Event Checklist

Event Identity Rules

• id: local identifier
• externalId: stable cross-system identifier used for dedupe
• googleEventIds: per-calendar Google event mapping
• updatedAt: event-level timestamp for conflict resolution

Do not remove externalId from existing records.

Preferred Interface