/**
 * MRSF Writer — serialize MrsfDocument back to YAML or JSON.
 *
 * Uses CST-level (Concrete Syntax Tree) round-trip editing via the `yaml`
 * library so that unchanged content is byte-identical to the original file.
 *   - Preserves YAML comments (#)
 *   - Preserves scalar styles (>, |, quotes)
 *   - Preserves key ordering and whitespace
 *   - Only modifies values that actually changed
 *
 * Auto-computes selected_text_hash when selected_text changes.
 */
import type { MrsfDocument, Comment } from "./types.js";
/**
 * Compute SHA-256 hex hash of a string (UTF-8).
 */
export declare function computeHash(text: string): string;
/**
 * Ensure selected_text_hash is consistent for a comment.
 * If selected_text is present, computes/updates the hash.
 * If selected_text is absent, removes the hash.
 */
export declare function syncHash(comment: Comment): Comment;
export { toYaml, toJson } from "./serialize.js";
/**
 * Write an MrsfDocument to disk.
 *
 * When a YAML file already exists on disk, performs a **CST-level** round-trip
 * merge that preserves YAML comments, scalar styles, key ordering, and
 * whitespace byte-for-byte for unchanged content.
 *
 * For new files or JSON, writes from scratch.
 *
 * Writes to the same file path are serialized (queued) to prevent race
 * conditions from concurrent calls.  All writes are atomic (temp + rename).
 */
export declare function writeSidecar(filePath: string, doc: MrsfDocument): Promise<void>;
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