/**
 * @param allBots every bot known to this host (from bots.json), each with its
 * `larkAppId` and `apiOnly` flag. apiOnly (core-only) bots are EXCLUDED as
 * migration candidates: they have no Feishu transport and can never DM an admin,
 * so migrating one to `enabled=true` would produce an undeliverable target (and
 * by sort order could even shadow a perfectly good non-apiOnly bot). The runtime
 * `isOverloadAlertTarget` fail-closes on apiOnly too, as a backstop for
 * hand-edited configs. Order-independent: the target is chosen by sorted app id
 * for determinism.
 */
export declare function migrateOverloadAlertAtStartup(allBots: Array<{
    larkAppId: string;
    apiOnly?: boolean;
}>): Promise<void>;
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