/**
 * WAW039: RDS Backup Retention Not Set
 *
 * Flags RDS instances and clusters without a positive BackupRetentionPeriod —
 * a retention of 0 (or an unset property on a resource that otherwise pins
 * every other property explicitly) disables automated backups entirely.
 */
import type { PostSynthCheck, PostSynthContext, PostSynthDiagnostic } from "@intentius/chant/lint/post-synth";
export declare function checkRdsBackupRetention(ctx: PostSynthContext): PostSynthDiagnostic[];
export declare const waw039: PostSynthCheck;
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