Claude on Taeyoung Kim

Claude Code Source Code Got Leaked

Fri, 03 Apr 2026 00:00:00 +0900

The day Claude Code's source code leaked, I pulled two all-nighters after work building an agent harness. Then I opened the source and found everything I'd built was already in there. A tale of wasted effort.

Claude Code Token Saving EP.3 — Splitting CLAUDE.md into rules/

Mon, 30 Mar 2026 00:00:00 +0900

Splitting CLAUDE.md into .claude/rules/ to reduce per-turn token reads. Achieved 32–47% reduction across 3 projects, but the real culprit was something else entirely.

Claude Code Discord Alert Integration — Multi-Project Monitoring System

Sun, 29 Mar 2026 00:00:00 +0000

I now have 5 projects. shop, blog, code_dungeon, good_game, and a root that manages them all (that’s not its actual name). Each project runs its own Claude session. The problem is there’s only one of me.

If I kick off a task in shop and switch to editing a draft in blog, I have no idea when shop finishes. If I start Phase 1 in code_dungeon and go check on good_game, code_dungeon might be stuck waiting for permission and I wouldn’t know. Staring at 5 terminals in rotation isn’t monitoring. It’s just eye strain.

Claude Code Token Saving EP.2 — Cutting Costs with Hooks and Subagents

Sat, 28 Mar 2026 00:00:00 +0000

After trimming down to 9 agents and putting CLAUDE.md on a diet, the intervals between Compacting conversation... messages got noticeably longer. Same tasks, but it lasted much longer than before. Felt good.

Then I was watching the console after requesting a new feature. Tests ran. 30 cases, all passing. But Claude was mentioning the successful tests again. Something felt subtly off.

I asked Claude. “Why are you mentioning tests that already passed?” Claude explained the concept of tools. When Claude executes a terminal command or reads a file, those are all “tool calls.” And every time a tool runs, its entire output stacks into the conversation context. npm test results — 30 lines. Hugo build log — 180 lines. All of it. Tests all passed with nothing to look at, yet it read all 30. For build errors, only the last 5 lines mattered, but it loaded all 180.

Claude Code Token Saving EP.1 — Hit the Limit in Three Hours

Fri, 27 Mar 2026 00:00:00 +0900

A friend asked me to build an e-commerce site for cosmetics. I’d been writing nothing but C at work, so this was a chance to try a new stack. Toss Payments for checkout, React for the frontend. “Every next-gen finance project is going React” — that comment stuck with me, and Toss Payments was Node-friendly. The direction came together quickly.

Obviously, I’d never used this stack before. I wanted to learn it, but the deadline didn’t allow for “study first, build later.” So I gave vibe coding a shot.