export interface LyraDiffOp{type:'equal'|'add'|'remove';text:string;}
/**
* A real line-level diff using Hirschberg's linear-space longest-common-subsequence algorithm --
* not a lexical/syntax-highlighting pass, and not "every removed line then every added line."
* Runtime remains O(n*m), while peak working memory is linear rather than an eager
* `(oldLines.length + 1) × (newLines.length + 1)` JavaScript-number matrix.
*/
export declare function computeLineDiff(oldLines:string[],newLines:string[]):LyraDiffOp[];export interface LyraDiffSplitRow{left:LyraDiffOp|null;right:LyraDiffOp|null;}
/**
* Regroups an already-computed `LyraDiffOp[]` (never re-diffs) into side-by-side rows: consecutive
* `remove`s buffer on the left, consecutive `add`s buffer on the right, and an `equal` op (or the
* end of the stream) flushes both buffers paired index-wise -- the k-th removed line beside the
* k-th added line, with the longer run's tail paired against `null` (rendered as an empty
* placeholder cell, never carrying a `+`/`-` prefix). An `equal` op renders identically on both
* sides.
*/
export declare function pairOpsForSplit(ops:LyraDiffOp[]):LyraDiffSplitRow[];