Projection Patterns Comprehensive guide to building projections and read models for event-sourced systems. When to Use This Skill - Building CQRS read models - Creating materialized views from events - Optimizing query performance - Implementing real-time dashboards - Building search indexes from events - Aggregating data across streams Core Concepts 1. Projection Architecture 2. Projection Types | Type | Description | Use Case | | -------------- | --------------------------- | ---------------------- | | Live | Real-time from subscription | Current state queries | | Catchup | Process historic…