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Event-Sourcing Framework for Go
Build distributed, event-sourced applications with type-safe aggregates, commands, and projections.
Event-Sourced Aggregates
Embed a base type, register typed event handlers, and let the framework handle versioning, persistence, and replay.
Distributed Events
Publish and subscribe to events with NATS or use MongoDB and PostgreSQL as event stores. Swap backends without changing application code.
Type-Safe Commands
Dispatch and handle commands with full generic type safety. Synchronous or asynchronous — your choice.
Projection Toolkit
Build read models with continuous or periodic schedules. Automatic progress tracking, debouncing, and startup catch-up.
Codec Registry
Map event names to Go types for automatic serialization. JSON by default, swap to MessagePack or Protobuf with one option.
Snapshots
Capture aggregate state at a point in time. Replay only recent events instead of the full history.
Testable
Fluent test assertions for aggregates, in-memory backends for integration tests, and conformance suites for custom implementations.
Modular Design
Use only what you need — the event system, commands, projections — and adopt more components as your project grows.
Batteries Included
MongoDB, PostgreSQL, and NATS backends ready to go. In-memory implementations for testing. Zero external dependencies for prototyping.