/**
 * LtreeCodecPlugin
 *
 * Ensures PostGraphile v5 properly handles ltree, lquery, and ltxtquery types.
 *
 * PostGraphile v5 (rc.8+) natively maps ltree to a GraphQL scalar named "LTree".
 * This plugin:
 * 1. Falls back to registering codecs if PostGraphile's native handling misses them
 * 2. Re-enables ltree columns for select/filterBy (overrides rc.8 HIDE_BY_DEFAULT)
 * 3. Converts between slash-delimited file paths (external API) and dot-delimited
 *    ltree (internal storage) at the GraphQL boundary via the codec's fromPg/toPg.
 *
 * External API: "/projects/alpha/docs" (slash-delimited file paths)
 * Internal DB:  "projects.alpha.docs" (ltree native format)
 *
 * The conversion happens at the codec level (fromPg/toPg) so it works regardless
 * of whether PostGraphile registers its own LTree scalar or we register ours.
 *
 * The native scalar name is "LTree" (capital T). All operators and downstream
 * plugins should reference LTREE_SCALAR_NAME for consistency.
 */
import type { GraphileConfig } from 'graphile-config';
export declare const LTREE_SCALAR_NAME = "LTree";
/**
 * Convert a slash-delimited file path to ltree format.
 * Idempotent on ltree values (no slashes → no change).
 *
 * "/projects/alpha/docs" → "projects.alpha.docs"
 * "projects.alpha.docs"  → "projects.alpha.docs" (no-op)
 */
export declare function slashToLtree(value: string): string;
/**
 * Convert an ltree value to a slash-delimited file path.
 *
 * "projects.alpha.docs" → "/projects/alpha/docs"
 * ""                     → "/"
 */
export declare function ltreeToSlash(value: string): string;
export declare const LtreeCodecPlugin: GraphileConfig.Plugin;