export type Fail = (message: string, field?: string) => never;
export declare function includesLiteral<T extends string>(values: readonly T[], value: unknown): value is T;
export declare function protocolFailure(message: string, field?: string): never;
export declare function requestFailure(message: string, field?: string): never;
export declare function isRecord(value: unknown): value is Record<string, unknown>;
export declare function exact(record: Record<string, unknown>, required: readonly string[], optional: readonly string[], subject: string, fail: Fail): void;
export declare function string(value: unknown, field: string, maxBytes: number, empty: boolean, fail: Fail): string;
export declare function parseRunId(value: unknown, field: string, fail: Fail): string;
export declare function literal<T extends string | number | boolean>(value: unknown, expected: T, field: string, fail: Fail): T;
export declare function number(value: unknown, field: string, integer: boolean): number;
export declare function json(value: unknown, field: string, fail: Fail): void;
export declare function serializedLimit(value: unknown, max: number, subject: string, fail: Fail): void;
export declare function selector(value: unknown, field: string, fail: Fail): string;
export declare function validateSchemaSafety(schema: unknown): void;
/** @returns A deeply frozen boolean or object JSON Schema snapshot. */
export declare function immutableJsonSnapshot(value: unknown): boolean | Readonly<Record<string, unknown>>;
export declare function schemaValidator(schema: boolean | Readonly<Record<string, unknown>>): (value: unknown) => boolean;
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