/**
 * Capture array elements that will be removed when shrinking array length.
 *
 * @param targetArray - The array being modified
 * @param oldLen - The current length
 * @param newLen - The new (smaller) length
 * @returns Array of {index, value} pairs for elements that will be removed
 */
export declare const captureShrinkRemovals: (targetArray: any[], oldLen: number, newLen: number) => {
    index: number;
    value: any;
}[];
/**
 * Delete an array element by index using splice to avoid sparse arrays.
 * Suspends write notifications during the splice to avoid noisy intermediate records.
 *
 * @param root - The root object (for suspend/resume context)
 * @param arrayTarget - The array to modify
 * @param index - The numeric index to delete
 * @returns true if deletion succeeded
 */
export declare const deleteIndex: (root: object, arrayTarget: any[], index: number) => boolean;
/**
 * Check if a delete operation is for an array index.
 *
 * @param target - The target object
 * @param key - The normalized key
 * @returns true if this is an array index deletion
 */
export declare const isArrayIndexDeletion: (target: any, key: string) => boolean;
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