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Two-Way Sync with Conflict Resolution
Built a reliable bidirectional synchronization workflow between Notion and Google Calendar using n8n.
The workflow detects changes on either side, compares modification timestamps, resolves conflicts using the latest-change-wins approach, and updates the other system without creating duplicate records or infinite sync loops.
Key capabilities:
Bidirectional Notion ↔ Google Calendar synchronization
Last-modified timestamp conflict resolution
Persistent sync-state tracking
Loop/echo prevention
Duplicate prevention
Conflict logging
Idempotent execution
Tested for: state persistence, idempotency, timestamp comparison, simultaneous edits, duplicate prevention, and loop prevention.
Tools: n8n · Notion API · Google Calendar API
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