DhungJoo Kim.
Vol. 01 · May 2026Mon · 8am ET

Operator notes from inside the businesses I run.

8,400+ operators read the memo on Monday morning. A specific call from last week, the trade-off, and the rule that came out of it. Three to seven minutes. No frameworks.

Start here.

One memo a week. Filed Monday at 8am ET.

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DhungJoo Kim
DhungJoo Kim.
Operator · Advisor · Writer
003· issue
Filed · 05·01·26Read · 5 minOperator log
Latest issue

The week I stopped running standup.

Five hours a week, four people on the call, one person doing the talking — me. The cut, the replacement, and the metric I'm watching for two weeks before I call it.


§ What you get

The memo, every Monday.

Operator log

A specific call this week. The decision, the trade-off, and the rule that came out of it. From inside the businesses I run.

Builder breakdown

An internal tool I built this week — the prompt, the API, the hour count, and the report it replaced. The library lives at /tools and /workflows.

Selective take

Once a week, a contrarian read on operating advice — with a specific receipt: the hire, the spec, the call, the number.


03 · Recent issues

From the archive.

All memos →
003· issue
Operator log

The week I stopped running standup.


Filed · May 01 · 26Read · 5 min
002· issue
Builder breakdown

An image-prompt pipeline in an afternoon.


Filed · Apr 24 · 26Read · 7 min
001· issue
Selective take

Hiring isn't the fix. The spec is.


Filed · Apr 17 · 26Read · 4 min

04 · Companies

Inside the businesses I run.

A small portfolio of services and software businesses. The memo is the operating log from inside them.


Selected exits
  • DataGhost
    Acquired by LeadMagic, 2023
  • Spuddy's & Friends
    Sold via Acquire.com
  • Marvel Maids
    Sold to a private buyer in Arizona
05 · The library

The tools we actually use.

Prompts.

Tested AI prompts, by output type.

Tools.

The model + app stack we run on.

Workflows.

Multi-step playbooks end-to-end.

Open-source repos.

What we shipped to GitHub.

Dk

Read the memo from inside the work.

One memo a week. Filed Monday at 8am ET.