Which remedy involves a court-ordered requirement that a party fulfills a promise made in a contract?

Specific performance is a legal remedy that compels a party to fulfill their contractual obligations as promised. This remedy is particularly relevant in situations where monetary damages would not adequately compensate the aggrieved party for the breach. For instance, in real estate transactions, if a seller agrees to sell a unique property and later decides not to go through with the sale, the court may order specific performance, requiring the seller to complete the sale as initially agreed.

This remedy ensures that the parties adhere to the terms of the contract, thus maintaining the essence of the agreement. It underscores the significance of the contractual promise and the expectation that both parties will act in good faith to fulfill their commitments. In circumstances where the subject matter is unique or where monetary compensation wouldn't replace what was promised, specific performance is favored.

Other remedies might involve compensating for losses or undoing the contract, but they do not require a party to act as per the contract's original terms. Therefore, specific performance stands out as the appropriate choice for a court-ordered requirement to fulfill a promise made in a contract.