Sekiban Event Sourcing and CQRS Dev Blog
Tomohisa Takaoka

Tomohisa Takaoka

CTO of J-Tech Creations, Inc. Recently working on the development of the event sourcing and CQRS framework Sekiban. Enthusiast of DIY keyboards and trackballs.

Genius by Imitation: How Cline & Sonnet are Redefining Programming Innovation

Mar 6, 20258 min read

Introduction The evolution of AI-powered programming assistance tools has been remarkable, and the combination of Cline and Sonnet 3.7 in particular...

Genius by Imitation: How Cline & Sonnet are Redefining Programming Innovation

Designing Systems for the AI Coding Revolution: Achieving Regret-Free Architecture with Event Sourcing and the Actor Model

Feb 23, 20258 min read

💡 This article was created by first drafting with Cline + Claude 3.5 Sonnet based on my ideas, and then using Cline to iteratively refine and edit...

Designing Systems for the AI Coding Revolution: Achieving Regret-Free Architecture with Event Sourcing and the Actor Model

Event Sourcing Is Simple!: A 400-Line In-Memory Lightweight Framework

Dec 6, 20245 min read

I'm currently experimenting with rewriting the way domains are described in Sekiban, Event Sourcing and CQRS Framework, to be simpler and more...

Event Sourcing Is Simple!: A 400-Line In-Memory Lightweight Framework

Enhancing Flexibility in Event Sourcing by Evolving Aggregate Types

Oct 8, 202411 min read

I am Tomohisa Takaoka, CTO of the J-Tech Japan, We are currently developing Sekiban, an Event Sourcing/CQRS framework, at the company. It is an...

Enhancing Flexibility in Event Sourcing by Evolving Aggregate Types

Serializing and deserializing interface properties in C# to JSON using JsonDerivedType

Aug 6, 20245 min read

TL;DR When serializing/deserializing a class with an interface property like public record User(string Name, IUserEmail Email); in C#, you can achieve...

Serializing and deserializing interface properties in C# to JSON using JsonDerivedType

Reasons and Solutions for Deserialization Failure of Data Persisted in Json while Representing State with Types in C#

Aug 3, 20247 min read

"JsonDerivedType" is an attribute in C# that can be attached to a parent interface to define which types implement that interface, allowing the state...

Reasons and Solutions for Deserialization Failure of Data Persisted in Json while Representing State with Types in C#