Work you do in your own time for a hiring process. Agents can now finish many of them, so companies are banning AI on them, redesigning them, or moving to scoped builds and live follow-up. Expect to defend every line.
If an agent can pass a test, passing it shows little, so the result matters less and the conversation after it matters more. Read the rules first. Then keep your plan, your questions and your changes, because those show the part the agent didn't do.
Say it to your agent
“This is a take-home, and AI is allowed. Before any code, write PLAN.md and QUESTIONS.md: what I do first, what I defer, every gap in the spec, and what I am assuming. Then stop, and I'll decide. Keep a log of what you wrote and what I changed, so I can disclose it.”