/** Minimal config fields required by every package. */
export interface BaseConfig {
    /** Path to the OpenAPI 3.1 spec file (JSON or YAML) */
    input_openapi: string;
    /** Directory to write generated files */
    output: string;
}
export declare const FORBIDDEN_OUTPUT_PREFIXES: string[];
export declare const FORBIDDEN_INPUT_PREFIXES: string[];
/** Returns true when the path ends in a JS/ESM config extension. */
export declare function isJsConfigPath(configPath: string): boolean;
export declare function validateConfigPath(configPath: string): void;
export declare function validateOutputPath(resolvedOutput: string): void;
export declare function validateInputPath(resolvedInput: string): void;
/** Options for loadConfigFile. */
export interface LoadConfigOptions<T> {
    /** Working directory used to resolve relative paths. */
    cwd: string;
    /** Explicit config file path (optional). If omitted, defaultFileName is used. */
    configPath?: string;
    /** Default config file name, resolved against cwd when configPath is not provided. */
    defaultFileName: string;
    /**
     * Package-specific parse function. Receives the raw config record, the validated
     * base fields, and cwd. Must return the final typed config object.
     */
    parse: (raw: Record<string, unknown>, base: BaseConfig, cwd: string) => T;
}
export declare function loadConfigFile<T>(opts: LoadConfigOptions<T>): Promise<T>;
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