P2P Browser Chat on iroh — Architecture and Lessons
A peer-to-peer browser chat built on iroh and iroh-gossip, with a self-hosted QUIC relay and a real-time network trace panel. Write-up of the architecture and three things that went wrong.
ブログ
Blog — 7 articles
May 16, 2026
extract-design — Reverse-Engineering a Brand's Visual Language
Building a Claude Code plugin that extracts a complete design system from any URL, screenshot, or Figma file — tokens, preview, and a self-audited write-up in one shot.
市場 — A Personal Crypto Watchlist
Building a live crypto market dashboard with CoinGecko's free API, SVG sparklines, graceful rate limit handling, and a brutalist design system.
支払い — Building a Payment Page
A payment page with QRIS, Ethereum, and live crypto prices — because every developer portfolio should have a clean way to get paid.
Mobile UX: Less Clutter, More Control
Condensing 8 nav items into 5, adding a globe visibility toggle, and hiding the audio player on scroll — small changes that make mobile feel intentional.
jeong_os: Writing a Kernel in Rust
A weekend side project — building a minimal x86_64 operating system kernel from scratch in Rust, with VGA text output, serial diagnostics, and a custom test framework.
Building This Portfolio
A deep dive into the architecture behind this portfolio — Next.js, GSAP, canvas globe, and Japanese brutalist design.