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DDD building blocks for .NET: AggregateRoot, ValueObject, Entity, StronglyTypedId, Result<T>, Error, and IRepository. Zero external dependencies.

CQRS dispatcher, pipeline behaviors, and cross-service integration abstractions for .NET microservices. Depends only on Koto.Domain and Microsoft.Extensions abstractions.

Wolverine-based implementation of Koto messaging abstractions: integration event publishing, command dispatching, Kafka consumers with idempotency, correlation propagation, and DLQ routing.

FluentValidation extensions for Koto: MustBeValueObject, MustBeEntity, ListMustContainNumberOfItems, and ValidationBehavior pipeline integration.

Event Sourcing on PostgreSQL via Marten 8: EventSourcedAggregateRoot, event-sourced repository, inline and async projections.

EF Core 10 integration for Koto DDD: generic repository, strongly-typed ID converters, specification pattern, and Wolverine outbox wiring.

Anti-Corruption Layer for HTTP calls between services: typed ServiceHttpClient base, Result-mapped error handling, correlation ID propagation, and standard resilience.

FastEndpoints integration for Koto: CQRS base endpoints, RFC 7807 Problem Details from Error, correlation ID middleware, and global exception handler.

GigaChat integration for Semantic Kernel

DDD-specific test helpers for Koto: fluent aggregate assertions, in-memory fake repositories, fake integration event publisher, and Result<T> AwesomeAssertions extensions.

One-liner observability setup for Koto microservices: Serilog structured logging with OTLP sink, OpenTelemetry traces and metrics, and correlation ID enrichment.

Transport-agnostic ASP.NET Core integration for Koto: Result-to-IResult/ActionResult mapping, RFC 7807 Problem Details from Error (multi-error aware), and an extensible error-code-to-HTTP-status registry. Works... More information

Quartz.NET-based scheduled jobs and batch processing for Koto microservices. Distributed locking via Quartz clustered mode (PostgreSQL). Structured logging for every job execution.

PostgreSQL pieces of Koto messaging: durable IProcessedMessageStore for consumer idempotency (survives restarts, auto schema, background cleanup) and UseKotoDurableOutbox — one-line durable outbox defaults... More information

Integration-test building blocks for Koto microservices: header-based test authentication for WebApplicationFactory hosts, Eventually assertions for async projections/consumers, and a raw-JSON Kafka producer... More information