import type { CslItem } from "../../core/csl-json/types.js";
/**
 * Compare two CSL items and return the list of changed field names.
 * Excludes protected custom fields (uuid, created_at, timestamp).
 */
export declare function getChangedFields(oldItem: CslItem, newItem: CslItem): string[];
/**
 * Format a single field change for display.
 *
 * Examples:
 *   title: "Old Title" → "New Title"
 *   author: +1 entry
 *   volume: → "42"
 *   volume: "42" → (removed)
 *   issued: "2024-03-15" → "2024-04-01"
 */
export declare function formatFieldChange(field: string, oldValue: unknown, newValue: unknown): string;
/**
 * Get a field value from a CslItem, supporting dot notation for custom fields.
 */
export declare function getFieldValue(item: CslItem, field: string): unknown;
/**
 * Format all change details for a pair of old/new items.
 * Returns formatted change lines (indented with 2 spaces).
 */
export declare function formatChangeDetails(oldItem: CslItem, newItem: CslItem): string[];
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