interface OldBackendApp {
    id: string;
    type: string;
    name: string;
    enableBullQueue?: boolean;
    [key: string]: unknown;
}
interface NewBackendApp {
    id: string;
    type: string;
    name: string;
    [key: string]: unknown;
}
interface PluginConfig {
    id: string;
    name: string;
    packageName: string;
    version: string;
    config?: unknown;
}
interface OldConfig {
    apps?: OldBackendApp[];
    plugins?: PluginConfig[];
    [key: string]: unknown;
}
interface NewConfig {
    apps?: NewBackendApp[];
    plugins?: PluginConfig[];
    [key: string]: unknown;
}
/**
 * Migration to move enableBullQueue from backend apps to queue/bullmq plugins
 *
 * This migration:
 * 1. Finds backend apps with enableBullQueue: true
 * 2. If found, adds the queue parent plugin with implementationPluginKey pointing to bullmq
 * 3. Adds the bullmq child plugin with default config
 * 4. Removes enableBullQueue from all backend apps
 */
export declare const migration021MigrateBullmqToPlugin: import("./types.js").SchemaMigration<OldConfig, NewConfig>;
export {};
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