In New York, all contracts imply a covenant of good faith and fair dealing, which, broadly stated, constitutes a pledge that neither party will do anything which will have the effect of destroying or injuring the other party's right to receive the fruits of the contract. The covenant requires the parties to perform under the contract in a reasonable way.
Mahope Family L.P. v. Avgush, NY Slip Op 05253 (2d Dep't October 18, 2023)