"No, I don't know how to do that."

It is true in this case.

Often, I have a sense in my mind, "But I can learn in a reasonable length of time." But this time, the question was, "Well, could you work as a software engineer?"

I paused, considered, and said, in so many words, "I can write code that runs in several different languages, including the one that you are using, but I do not trust it to deploy in a production environment. I am weak at writing tests, I don't really understand scaling problems, and I am pretty sure it will fall over in a stiff breeze."

Unfortunately, she is only hiring engineers at this point. I said, "No. Claiming that I am a software engineer would be overstating my skills. I would definitely have to come on board as a junior developer at this point."

My castle looks more like this - recognizably a castle, but not something you would want to live in.

I did also tell her (since I had her on the line) that I am at a much more mature level in all the "adjacent to code" skills: project management, product management, debugging, QA, documentation, interviewing users, requirements gathering, technical training... just not architecture.

She's not hiring those at the moment, but she might someday... and perhaps when she does, she will think, "Hey, who was that woman who was clear about how well she knew how to code?"