Whether a court of appeals may dismiss as 'frivolous' a § 1983 plea-breach claim supported by recorded evidence and governed by Santobello v. New York

Whether a court of appeals may dismiss as "frivolous" a § 1983 plea-breach claim supported by recorded evidence and governed by Santobello v. New York, where: (a) Petitioner presented recorded admissions from his own defense counsel confirming that the prosecutor knew the guilty plea was induced by custody promises, that those promises were never reduced to writing, and that the breach constituted grounds for a "viable motion to withdraw [the] plea" (see