Here is the part I was told, when I started, that I had no business attempting. I knew nothing about farming, and I designed a livestock feature now used across 835 farms in 114 countries.
But the number isn't the proof. The proof is that the two farmers at the opposite ends of everything the research uncovered are both served by the same feature, and neither was compromised for the other.
Take Tristan and Aubyn, in British Columbia. They run hundreds of pigs and thousands of chickens, and for them, individual animals are neither trackable nor relevant. "During the summer we'll raise about 4,000 chickens, but those are tracked per batch, the whole 2,000 in one go. Any mortalities, feed numbers, slaughter data, it's all tracked for that flock." When I asked how they identify animals, the answer was blunt: "I don't have an animal ID for each one of those pigs. I just have an animal ID for that group of pigs, and I use the invoice number." What they needed from software was the ability to add forty hogs and be done: "I don't even really know or care which ones are male or female. I just need to be able to save the whole thing with no details."
Now take Sara, in the west of Ireland. She keeps six dairy goats, maxing out at ten, and knows every one by personality. "A bottle fed goat is like a dog, and a parent fed goat is like a goat." For her, the individuality is the point, and it's exactly what she finds missing in farm software: "There's not a lot of room for that individuality. I like that this app is more for niche farms, that there's that bespoke nature to it." When she used the prototype, she reacted to the precise thing the research had told me to build: "You have the animal's name and their tag number right there. That's awesome."
Tristan needs to save forty hogs with no details. Sara needs her goats' names on the screen. The interviews revealed that fork, herd size decides which side of it a farmer lives on, and the feature holds both without forcing either to bend. The breeder who names every animal and the rancher running flocks of thousands are both in the product, both served, exactly as the research said they'd need to be.
That is what I mean when I say the craft transfers. I did not become a livestock expert. I became a good enough student of livestock farmers that the thing I designed fits their lives, whether they run six goats or four thousand chickens. The domain terrified me at the start. The process, research, synthesis, the discipline to let farmers' reality drive the decisions, is what carried me from zero to a feature they rely on. Drop me into a domain I don't understand, and this is what I'll do in it.