import type Database from 'better-sqlite3';
import type { EntityType, RelationType, BootstrapResult, SchemaMeta } from './entity';
/** Schema YAML structure (simplified) */
interface SchemaDefinition {
    entity_types?: Array<{
        name: string;
        description?: string;
        required_fields?: Record<string, string>;
    }>;
    relation_types?: Array<{
        name: string;
        from_types?: string[];
        to_types?: string[];
        cardinality?: string;
        inverse_of?: string;
        description?: string;
    }>;
}
/**
 * Bootstrap graph schema from a definition object.
 * Idempotent: existing types are skipped.
 */
export declare function bootstrapSchema(db: Database.Database, schema: SchemaDefinition, sourceFile?: string): BootstrapResult;
/**
 * Get schema metadata (returns the most recent row).
 */
export declare function getSchemaMeta(db: Database.Database): SchemaMeta | undefined;
/**
 * Check if schema has been bootstrapped.
 */
export declare function isSchemaBootstrapped(db: Database.Database): boolean;
/**
 * Get all entity types.
 * builtin:3.0 (Sprint 31): Derives entity types from documents.type dynamically.
 * No entity_types table is read.
 */
export declare function getEntityTypes(db: Database.Database): EntityType[];
/**
 * Get all relation types.
 */
export declare function getRelationTypes(db: Database.Database): RelationType[];
export {};
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