The course · Part 4
Building
Part four. Once an idea has passed the tests, it has to become a program that connects to an exchange, holds a position, and survives a bad day. This part shows how the lab builds that program with AI coding tools doing most of the typing, what to specify, what to check by hand, and how to run it safely on paper before real money.
Reading order
Plan a small program you can understand
Split your first system into data, decisions, paper fills, and a readable log.
Use AI tools to build one piece at a time
Give the coding tool a precise task and check the behavior it produces.
Replay data before connecting a live feed
Run the same sequence twice and check that it produces the same decisions.
Follow the decisions in a paper run
Connect the pieces while keeping fills and positions explicitly simulated.
Make the program easy to stop and inspect
Finish with clear status, useful logs, and a repeatable paper-run review.
Other parts, and the research