Grade a delivered job. Code checks what it can. Jev answers the rest, and the answers are recorded.

Summarise in one sentence of at most 12 words: "The buyer escrows the price; the seller posts a deposit; an evaluator decides whether the delivery met the task, and a disputed decision goes to an arbiter."

Buyer escrows, seller deposits, evaluator decides, and disputes go to an arbiter for a final ruling.