If Craven then repudiates the agreement and the foregoing facts are proved or admitted in Bypast's suit against Craven for breach of contract, is Bypast entitled to recover under the prevailing view?
No, because Bypast did not bring the will contest in good faith. 
No, because an agreement to oust the court of its jurisdiction to decide a will contest is contrary to public policy
Yes, because the Bypast-Craven agreement was a bargained-for exchange. 
Yes, because the law encourages the settlement of disputed claims. 