import type { GraphileConfig } from 'graphile-config';
/**
 * Many-to-Many Preset with OPT-IN behavior (disabled by default).
 *
 * WHY THIS EXISTS:
 * The default @graphile-contrib/pg-many-to-many plugin adds many-to-many connection
 * fields to EVERY junction table automatically. This can bloat the API with fields
 * that may never be used.
 *
 * OUR FIX:
 * We override the default behavior to be OPT-IN instead of OPT-OUT:
 * - By default, NO many-to-many fields are generated
 * - To enable for a specific junction table, use: @behavior +manyToMany
 *
 * USAGE:
 * To enable many-to-many for a specific junction table, add a smart comment:
 *
 * ```sql
 * -- Enable many-to-many through this junction table
 * COMMENT ON TABLE post_tags IS E'@behavior +manyToMany';
 *
 * -- Or enable on a specific constraint
 * COMMENT ON CONSTRAINT post_tags_tag_id_fkey ON post_tags IS E'@behavior +manyToMany';
 * ```
 *
 * SOURCE CODE REFERENCE:
 * The many-to-many plugin uses the behavior system to control field generation:
 * https://github.com/graphile-contrib/pg-many-to-many/blob/v2.0.0-rc.1/src/PgManyToManyRelationPlugin.ts#L478-L503
 *
 * The plugin defines these behaviors:
 * - `manyToMany` - Controls whether many-to-many fields are generated
 * - `connection` - Controls whether connection fields are generated
 * - `list` - Controls whether list fields are generated
 *
 * By default, the plugin's entityBehavior for pgManyToMany includes:
 * `["manyToMany", "connection", "list", behavior]`
 *
 * We override this to be `-manyToMany` by default, requiring explicit opt-in.
 */
/**
 * Plugin that makes many-to-many fields opt-in by default.
 *
 * This overrides the default behavior from @graphile-contrib/pg-many-to-many
 * to require explicit `@behavior +manyToMany` smart tags.
 *
 * NOTE ON TYPE REGISTRATION:
 * The upstream plugin's init hook registers GraphQL types (edge/connection)
 * for ALL discovered relationships unconditionally — before behavior filtering.
 * Our pgManyToMany behavior only gates field creation, not type registration.
 * If two junction tables produce the same inflected type name, the duplicate
 * registration will crash graphile-build. The build hook below wraps
 * registerObjectType to catch such collisions and skip the duplicate,
 * preventing the crash without modifying the upstream plugin.
 */
export declare const ManyToManyOptInPlugin: GraphileConfig.Plugin;
/**
 * Preset that includes the many-to-many plugin with opt-in behavior.
 *
 * Use this in your main preset's `extends` array:
 * ```typescript
 * const preset: GraphileConfig.Preset = {
 *   extends: [
 *     MinimalPreset,
 *     ManyToManyOptInPreset,
 *     // ... other presets
 *   ],
 * };
 * ```
 */
export declare const ManyToManyOptInPreset: GraphileConfig.Preset;
export default ManyToManyOptInPreset;