Hello, I'm Forrest Kim김선태 (Sun Tae Kim)

Every morning, yesterday's me waits — already organized

Claude Code's JSONL session logs get handed off by a Stop hook to a separate instance, which writes them into personal notes. Wake up in the morning and yesterday's thinking is already sorted.

I Gave AI a Smartphone. It Did Everything a QA Engineer Does.

291 screenshots from full app exploration, fee anomaly detection, 37-axis comparison report auto-generated. A real case of AI replacing observation, judgment, and reporting.

We Made AI Control a Phone 10x Faster

Merged 6 MCP tools into one, replaced coordinate taps with text targeting, added React Native support. Completed a real DeFi bridge in 2 MCP calls.

AI Tool Development Is Fundamentally Different from Building Conventional Services

Design philosophy, testing methodology, and the fundamental differences I discovered while building MCP tools for AI agents.

Digital Finance 3.0 Era: Analysis of Capital Market Transformation Led by RWA and Stablecoins

In the RWA era, 'US Treasury-backed' vs 'Korean Bond-backed', where should Korea stand?

Reflections on the Stages of Jongshim and Self-Constitution

RWA Revolution: Why Wall Street is Going All-In on the 'Single On-Chain Golden Source'

Switching from Claude to Codex