/**
 * Normalize OpenAI-style `*** Begin Patch` hunks for display.
 *
 * Problem: in the `Begin Patch` format the model often emits a hunk that
 * reproduces a whole block of a file with the old version as `-` lines and the
 * new version as `+` lines, even when most of those lines are identical. This is
 * the "contextless / loose hunk matching" behavior. A patch that effectively
 * only adds one line can therefore look like it deletes several existing rules.
 *
 * The naive per-line renderer (`diffLineStyle`) faithfully colors every `-` red
 * and every `+` green, which misleads the user.
 *
 * Fix: for each `*** Update File:` hunk we reconstruct the old side
 * (context + `-` lines) and the new side (context + `+` lines), compute a
 * minimal LCS line diff between them, and re-emit the hunk so that:
 *   - lines present in both sides become plain context (no `-`),
 *   - truly removed lines stay `-`,
 *   - truly added lines stay `+`.
 *
 * This is a display-only transformation. Well-formed minimal hunks (and any
 * non-`Begin Patch` unified diffs) are left untouched.
 */
/** Re-emit a `*** Begin Patch` string with loose hunks re-minimized. */
export declare function normalizeBeginPatchForDisplay(patch: string): string;