SJ.Wu

Avatar, OG Image, and Favicon in Blowfish: Three Things, Three Params

Sun, 07 Jun 2026 03:00:00 +0800

The profile avatar, the social-share OG image, and the browser favicon look like one ‘site picture’ — but in Blowfish they are three independent settings in three different places. Here’s which param does what, why homepageImage is none of them, and how I generated an SJ favicon from one command.

Moving a GitHub Pages Site to a Custom Domain (Cloudflare Registrar)

Sun, 07 Jun 2026 02:00:00 +0800

Pointing a freshly registered apex domain at a GitHub Pages site, end to end: the repo changes, the Cloudflare DNS records, the one proxy setting that breaks HTTPS, and how to verify the cutover — plus domain verification to stop anyone hijacking the name.

Building This Site with AI in a Day: From Résumé and Notes to an Automated Deploy

Sun, 07 Jun 2026 01:00:00 +0800

Using Claude Code with Hugo + Blowfish + GitHub Actions to turn a PDF résumé and a pile of scattered tech notes into this bilingual, auto-deployed personal site — in a day. The workflow, the disclosure discipline, and the gotchas.

A Terminal Dev Environment Built for AI Collaboration: NeoVim + Yazi + tmux + LazyGit × Claude Code

Fri, 01 May 2026 00:00:00 +0000

Claude Code is a terminal-native AI coding tool. Wrapping it in tmux + NeoVim + Yazi + LazyGit gives an all-keyboard, all-terminal workflow where the human focuses on reviewing and gatekeeping what the AI produces — plus the gotchas I hit setting it up.

A Practical Guide to AI-Assisted Development: Agent.md + Skills

Tue, 31 Mar 2026 00:00:00 +0000

How to use Agent.md (CLAUDE.md / AGENTS.md) and Skills to make AI-assisted development more effective: core concepts, meta-prompts, skill-creator, and the differences between Claude Code and Codex.

KYC Liveness & Deepfake Detection

Sun, 01 Mar 2026 00:00:00 +0000

A production computer-vision service that decides whether a face-verification submission is a real, live person or a spoof / deepfake.

Sharing Feign API Contracts via a Common Module in Spring Cloud

Wed, 11 Feb 2026 00:00:00 +0000

Put the Feign interface, VOs, and DTOs in one shared module: the server implements the interface as its controller, the consumer just injects and calls it — removing the legacy duplication where the interface and its client drift apart.

Backend Microservices Platform

Mon, 19 May 2025 00:00:00 +0000

Spring Cloud microservices for a customer-management and transaction platform — refactoring, performance, and engineering practices.

From Adoption to Integration: Automating Database Version Control with Liquibase

Fri, 27 Sep 2024 00:00:00 +0000

A write-up of my JCConf 2024 talk: how to automate database migration with Liquibase and integrate it seamlessly into a Spring Boot project, without sacrificing stability or security.

Notes from the 91 Speed-Coding Workshop

Tue, 14 Nov 2023 00:00:00 +0000

Toward ‘human-machine as one’: using the TDD rhythm, deliberate practice, and IDE/Vim mastery so that coding speed is no longer held back by physical operations.

Spring Boot for Beginners: My Study Notes

Sat, 24 Dec 2022 00:00:00 +0000

My notes from self-studying Spring Boot: IoC/DI, AOP, Spring MVC, RESTful APIs, request validation, Spring JDBC, the three-tier architecture, and unit testing with JUnit 5 and Mockito.

About

Mon, 01 Jan 0001 00:00:00 +0000

I’m a software engineer based in Taipei. My day-to-day is backend microservices — Spring Boot / Spring Cloud services, distributed transactions, caching, observability, and CI/CD — and I’m currently building applied machine learning / computer vision for identity verification: face liveness and deepfake detection running as a production service.

Before backend I spent several years in SSD firmware (FTL, garbage collection, wear-leveling, power-loss recovery), which is where I got comfortable reasoning about systems from the hardware up.