/**
 * DataBridge configuration file (.databridge.json) type definition
 *
 * TEACHING NOTE: This is the single source of truth for the config shape.
 * All commands that read/write .databridge.json should use this type
 * rather than untyped `any` from fs.readJSON().
 */
export interface DataBridgeConfig {
    /** Config schema version */
    version: string;
    /** Database connection settings */
    database: {
        /** Database connection URL (e.g., postgresql://user:pass@localhost:5432/db) */
        url: string;
    };
    /** API generation settings */
    api: {
        /** Output directory for generated API code (default: 'api') */
        outputPath: string;
        /** Server port (default: 3000) */
        port: number;
        /** CORS origin (default: '*') */
        cors?: string;
        /** Server host (default: '0.0.0.0') */
        host?: string;
        /** OpenAPI spec settings */
        openapi?: {
            title?: string;
            version?: string;
            description?: string;
            servers?: Array<{
                url: string;
                description?: string;
            }>;
        };
    };
    /** Authentication settings */
    auth?: {
        /** JWT secret for token signing */
        jwtSecret: string;
    };
    /** Project name (optional — may not be present in older configs) */
    projectName?: string;
}
/**
 * Validate a loaded config object has the minimum required fields.
 * Returns an array of error messages (empty = valid).
 *
 * TEACHING NOTE: We do manual validation rather than Zod here to avoid
 * adding a runtime dependency to every command. The config is small and
 * stable, so a hand-written check is sufficient.
 */
export declare function validateConfig(config: unknown): string[];
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