/**
 * Return why a suggestion body cannot be reconciled safely with GitHub's
 * anchored line range, or null when the exact range is safe to use.
 *
 * The range is authoritative: this validator never shifts or expands it. It
 * only detects bodies that appear to reach beyond the anchor, leaving manual
 * interpretation to the caller instead of emitting a structurally unsafe diff.
 */
export declare function getUnsafeSuggestionRangeReason({ originalContent, startLine, endLine, replacementLines, }: {
    originalContent: string;
    startLine: number;
    endLine: number;
    replacementLines: readonly string[];
}): string | null;