Blog

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.

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.

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.

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.

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.

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.

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.

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.

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.