innate

Don't fix the weakness.Build on the strength.

Nothing innate gets corrected here. It gets somewhere to grow.

Record

The same method, run four times at a widening scale.

I tried it on myself first.
Four books on productivity
Bookie · Hyejiwon · Youngjin · 2011–2023
I send it out every week.
Carrotletter
265+ issues · 12,000+ readers
I install it in other people's teams.
Lectures · workshops · consulting · mentoring
EBS Class-e · bootcamps · accelerators · companies
I finally built it into a tool.
Rondo
macOS desktop app

an innate product

One letter every Monday morning — only the productivity and AI tools I've actually used.

carrotletter.com

an innate product

Open a folder and its structure becomes your AI agent's context. A desktop workspace for CLI agents.

tryrondo.com

Not a tool demo. I build a system on top of how a team already works, so the structure carries the load instead of the people.

Lectures · workshops: AI productivity, working with agents, Claude Code. From a 90-minute talk to a multi-week course.
Consulting: Pull apart how a team works first, then decide where AI goes and in what order.
Mentoring · coaching: For founding teams and individuals, including accelerator and incubation programs.
Advisory: Product, content, and brand — the long engagement, not the short one.

Ask and I'll tell you who I've worked with.

01
What's innate
Look at it first. It isn't a defect to correct — it's material.
02
System
Build a structure that fits that material.
03
Output
Structure carries it, not willpower.

Three measures hold the structure up.

Evernote, mmhmm, Chegg, Moment Studio. Fifteen years using productivity tools and turning what I learned into books and lectures.

As of July 2026