event-store-designlisted

# Event Store Design Comprehensive guide to designing event stores for event-sourced applications. ## When to Use This Skill - Designing event sourcing infrastructure - Choosing between event store technologies - Implementing custom event stores - Optimizing event storage and retrieval - Setting up event store schemas - Planning for event store scaling ## Core Concepts ### 1. Event Store Architecture ``` ┌─────────────────────────────────────────────────────┐ │ Event Store │ ├─────────────────────────────────────────────────────┤ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │ │ Stream 1 │ │ Stream 2 │ │ Stream 3 │ │ │ │ (Aggregate) │ │ (Aggregate) │ │ (Aggregate) │ │ │ ├─────────────┤ ├─────────────┤ ├─────────────┤ │ │ │ Event 1 │ │ Event 1 │ │ Event 1 │ │ │ │ Event 2 │ │ Event 2 │ │ Event 2 │ │ │ │ Event 3 │ │ ... │ │ Event 3 │ │ │ │ ... │ │ │ │ Event 4 │ │ │ └─────────────┘ └─────────────┘ └─────────────┘ │ ├─────────────────────────────────────────────────────┤ │ Global Position: 1 → 2 → 3 → 4 → 5 → 6 → ... │ └─────────────────────────────────────────────────────┘ ``` ### 2. Event Store Requirements | Requirement | Description | |-------------|-------------| | **Append-only** | Events are immutable, only appends | | **Ordered** | Per-stream and global ordering | | **Versioned** | Optimistic concurrency contr