2025-07-02

The Symmetry in AI Development - Linting for Developers, Experience for Users.

Exploring the parallels between developer linting and user validation, and how this symmetry can enhance AI development and testing through tools like Playwright MCP.

2025-06-30

Local AI Review and Remote Human Review

In the AI development era, code review is one of the most important but tiring tasks. In this post, I will introduce an approach to use local AI code reviewing before remote human review.

2025-03-22

MCP Memo

Memo

2025-02-09

Understanding Intersection Types in TypeScript

A deep dive into intersection types in TypeScript, exploring how they work with primitives and objects.

2025-02-08

TypeScript Utility Types with Discriminated Unions

How to effectively use TypeScript utility types like Pick and Omit with discriminated unions by leveraging conditional types.

2024-09-04

Type in Runtime with TypeScript

Use TypeScript type in runtime.

2024-08-01

This Component is rendered on the client or server side in Remix?

Code reading of React.Children API

2024-04-26

Display MDX Metadata on Your Next.js Page

export metadata from MDX files and display it on your page using only @next/mdx

2024-02-21

Experimental Tiny Implementation of Suspense and ErrorBoundary in SwiftUI

2024-01-14

Type-Level Arithmetic in TypeScript, type Year2024 = Add<2000, 24>

Introduction to Type-Level Addition in TypeScript using Type Manipulation

2023-10-16

rscq, CLI Parser for React Server Component Payloads

I wanted to parse React Server Component Payloads. So I created rscq.

2023-10-10

RSC Payload & Serialized Props

React Server Components Payload and Serialized Props

2023-09-30

RSC Memo

If I create my own service using RSC, I will use these tips.

2023-01-19

CallKit with AWS chime.

Report for developing ios application with callkit and aws chime, only incoming call.

2023-01-04

Rust memo1

String Slice

2022-12-21

ドイツのトリ Advent Calendar 2022

Advent Calendar 2022

2022-02-26

麻雀君

TypeScriptの型だけで、麻雀の点数計算を行う

2022-01-19

Use enum like literal type.

OpenAPI is a tool for schema first development. They serves several generators for typescript, like typescript-axios. Enum is supported, but not literal type. I will introduce tips using enum as a literal type.

2021-12-02

First Step of Testing React Form.

I want to write test codes for React forms. 'react-hook-form' is used in this React app. I will test it with 'jest' and 'testing-library'.

2021-09-29

TestContainer testing with Jest, NodeJS.

Testing NodeJS application connects to PostgreSQL with Docker, Jest and TestContainer.

2021-04-01

Implementing Video Cropping to size of Preview.

Implementation cropping video to the size of preview for image processing, like QR Reading or OCR with captureDevicePointConverted API.

2021-03-23

React.Children API

Code reading of React.Children API

2021-03-22

Hello World

Tech blog with Gatsby.js

2021-03-22

Typescript Memo

Memo for type techniques of Typescript.