Event Sourcing

概要

This skill provides comprehensive guidance on building systems where state changes are stored as a sequence of events rather than just current values. It offers robust implementation patterns for event stores, domain aggregates, and read-model projections, making it ideal for applications requiring high-integrity audit trails, temporal queries, or complex event-driven architectures. By leveraging optimistic concurrency and snapshotting techniques, it helps developers build scalable, traceable, and highly resilient backend systems that can evolve without losing historical data.

主な機能

• Domain aggregate patterns for encapsulating business logic and event application
• Immutable event store implementation with versioning and optimistic concurrency
• PostgreSQL-specific implementation guides for durable event storage
• CQRS read-model projections for optimized data retrieval
• 17 GitHub stars
• Snapshotting strategies to improve performance in long-lived event streams

ユースケース

• Developing event-driven microservices requiring reliable cross-service communication
• Building financial systems with strict audit trail and compliance requirements
• Implementing temporal queries to reconstruct system state at any point in time