An AI design agent that shows its working
Engineering · 31 Oct 2026 · 5 min read · Speed team
How the agent plans, picks real parts and checks the physics after each stage, and why it never calls a design verified.
Most of the time spent on a concept is drafting: sketching the frame, placing the motors, sizing the battery. It is necessary work, and it is exactly the kind of work an agent can do quickly.
The agent in PKD 3D starts with a plan you can read. It lists the numbers you gave it and the ones it assumed, then it searches the parts catalogue for real motors, props and batteries.
Check, then repair
After each stage it runs the physics check. If a law fails, it looks for the cause, makes the smallest change that fixes it and checks again. At the end it goes through your brief and says which requirements are met, by how much, and which are not.
What it does not do is sign off. Results are labelled with their grade, estimates are marked as estimates, and the engineer makes the call.