Koh Jun Hao

Ships things. This is the log.

Analyst at Ouroboros Capital. Building FullMarks and Groundcrew Robotics. Angel in 89 companies.

Activity

16 Mar to 2 Oct 2026, one square per day

Darker means more prompts typed at a coding agent.

prompts typed: 3,863; prompts
commits, 18 repos: 877; commits
days with activity: 150/196; days
prompts on the busiest day: 186; 12 Aug

Shelf

What I watched, read and played

3 Body Problem2024, David Benioff, D.B. Weiss, Alexander Woo

RIPLEY2024, Steven Zaillian

One Day2024, Nicole Taylor

A Quiet Place: Day One2024, Michael Sarnoski

Lift2024, F. Gary Gray

Dune: Part Two2024, Denis Villeneuve

What Jennifer Did2024, Jenny Popplewell

Solo Leveling2024, Chugong

Kaiju No. 82024, Shigeyuki Miya

The Wonderful Story of Henry Sugar2023, Wes Anderson

Poison2023, Wes Anderson

Physical: 1002023

The Recruit2023, Alexi Hawley

The Night Agent2023, Shawn Ryan

Chimp Empire2023, James Reed

Rough Diamonds2023, Rotem Shamir

Painkiller2023, Micah Fitzerman-Blue, Noah Harpster

The Devil's Plan2023

Bodies2023, Paul Tomalin

The Three-Body Problem2023, Yang Lei, Zhao Jilong

John Wick: Chapter 42023, Chad Stahelski

The Equalizer 32023, Antoine Fuqua

Hunger2023, Sitisiri Mongkolsiri

The Mother2023, Niki Caro

Destination EarthAli Sparkes

Lost WorldsAndrew Lane

The Vault of DreamersCaragh M. O'Brien

Cybersecurity essentialsCharles J. Brooks

ShutterCourtney Alameda

Mr MonsterDan Wells

CrazyHan Nolan

Just Call my nameHolly Goldberg Sloan

Log

39 entries since April 2026, newest first

October 2026

3 entries

1 Oct

Build

This site gets rebuilt

The old front page listed eight sections next to a spinning top. This one lists what was made, by date.

1 Oct

Build

FullMarks lets strangers try it first

FullMarks marks Singapore exam answers against the mark scheme. Anyone can now have an answer marked before making an account. Four more subject pages and three chapter guides went up the same day.

1 Oct

Invest

Five more names on the portfolio page

Nous Research, Dyna Robotics, Acier, Replit and Atoms join the portfolio page.

September 2026

10 entries

30 Sep

Build

Every coding agent on the Mac now reads the same rules

One instructions file and one skills folder, linked into each tool. One copy, so there is one place to edit.

27 Septo 28 Sep

Build

Groundcrew Robotics gets a 40 second film and a research hub

Groundcrew is building the distribution layer for robotics in Southeast Asia. The site and logo went up two weeks earlier.

26 Septo 30 Sep

Cable winder, hanger organiser and two more models queued for the printer

Prepared for a Bambu P2S between 26 and 30 Sep.

25 Sep

Write

A robotics primer, from the joint up

How humanoids and service robots work, who builds them and what the parts cost. Eighteen chapters with original drawings and sourced numbers.

24 Sep

Video

Yuzu Money gets a 30 second launch video

Six scenes, cut on the bar lines of a 128 BPM track.

17 Sep

Build

A downloader for a very long list of saved videos

Paste the links. It checks each one, downloads what it finds and reports back per link.

9 Septo 11 Sep

Build

Two chance games that run in a browser tab

Each game is plain maths first, so a simulator can prove the house edge before anyone plays a round.

7 Sep

Build

A bot that forwards X posts to Telegram

Tell it which accounts to watch and new posts arrive in the chat. Every chat keeps its own list.

6 Sep

Build

The memecoin bot gets rebuilt

The trading rules live in a written playbook. The bot follows it.

4 Sep

Build

NKHY launches

A memecoin paired to a stock, with its own site.

August 2026

15 entries

29 Aug

Home

Home wifi, tuned

One router, retuned.

28 Aug

Research

Went looking for the 52 hertz whale. Stopped at day 396.

396 days of open hydrophone recordings from Monterey Bay were banked before the download was paused. The call has drifted lower since it was first heard, so the search has to match the shape of the call.

28 Aug

Research

Six theories of eel navigation meet 106 real eels

Pure drift is ruled out. A fixed compass heading ties with steering for a goal.

28 Aug

Home

A home lab corner, drawn before anything is bought

A 3D technical drawing you can orbit, with an exact parts list.

26 Aug

Write

Eight field manuals for the admin of adult life

Retirement savings, tax, estates, cars, renovation, banking and healthcare among them. Every figure checked against an official source.

25 Aug

Write

Insurance, audited without an agent

Every policy in the folder audited, then written up as a guide to doing the same.

25 Aug

Build

The phone becomes a trackpad for the Mac

A web page on the phone moves the cursor, types, controls media and takes dictation. Nothing to install on the phone.

24 Aug

Build

The wall TV now takes orders from a terminal

One command switches it on, sets the volume or puts a dashboard on screen.

21 Aug

Build

FullMarks adds General Paper and H2 Economics

470 General Paper essays and the Economics essay paper went live on the same day.

19 Aug

Build

FullMarks opens to primary school

PSLE Maths and Science go live.

17 Aug

Write

A teardown of fast casino games, in two languages

A slide deck in English and Chinese. Each language builds from a script, so neither is edited by hand.

14 Aug

Home

The home folder gets tidied by a script

Code in one place, data in another, finished one-offs archived. A second script undoes all of it.

12 Aug

Research

Rank 1 on Paradigm's RSI Simulator, for a while

On 12 Aug a run of 127.70 months beat the previous record by 12.5 months, played as @0xVega. The board has moved on since.

6 Augto 14 Aug

Man prints butterfly knife trainer. It fails again.

A plastic practice knife. Six versions of the print file exist. Cat toys and a dock were on the print list the same month.

6 Aug

Build

FullMarks gets homework

Teachers set it and sign off the marking.

July 2026

6 entries

31 Jul

Build

A logger for custody transfers and their compliance checks

Built to write each transfer and its screening result as one row in a spreadsheet.

30 Julto 31 Jul

Write

Ten primers, started in one night

Cars, home robotics, gardening, astronomy, materials, energy, control systems, distribution, building science and capital structure. The folders were created between 23:55 and 02:35. Each one was written to learn the subject.

27 Jul

Build

An upstream fix for a mouse that would not connect

An open source driver could not see the mouse over Bluetooth. One lost message was aborting a handshake of about 35 steps. Pull request 469, merged on 10 Aug.