/**
 * Mandatory delivery-unit identity for public backend federation loads
 * (MV-G23, ADR-0019 / RESOLUTION-0001 §2.3): consumers pass the record's
 * `unitId` + `buildMarker` through to identity validation.
 */
export type BackendFederationExpectedIdentity = {
    unitId: string;
    buildMarker: string;
};
export type BackendFederationIdentityIssue = {
    path: string;
    message: string;
};
/** Decode independently at each received-manifest / executed-expose boundary. */
export declare function backendFederationCompatibility(loaded: unknown): Record<string, unknown> | undefined;
export declare function validateBackendFederationCompatibility(compatibility: Record<string, unknown>, expected: Record<string, string | undefined>): BackendFederationIdentityIssue[];
export declare function validateExpectedBackendFederationIdentity(loaded: unknown, expected: BackendFederationExpectedIdentity): BackendFederationIdentityIssue[];
export declare function formatBackendFederationIdentityIssues(issues: BackendFederationIdentityIssue[]): string;