/**
 * cfn-lint patch fetcher and applier.
 *
 * Downloads cfn-lint patches from GitHub and applies them to raw schemas
 * before parsing. This enriches the schemas with additional type information,
 * enum values, and constraint fixes.
 */
export interface PatchWarning {
    typeName: string;
    patchFile: string;
    error: Error;
}
export interface PatchStats {
    patchesApplied: number;
    resourcesFixed: number;
    warnings: PatchWarning[];
}
/**
 * Fetch cfn-lint patches from GitHub tarball and extract to cache.
 * Returns the path to the extracted patches directory.
 */
export declare function fetchCfnLintPatches(force?: boolean): Promise<string>;
/**
 * Apply cfn-lint RFC 6902 patches to raw schema bytes.
 * For each schema, converts type name to directory name and applies
 * manual.json, smithy.json, format.json in order.
 */
export declare function applyPatches(schemas: Map<string, Buffer>, patchesDir: string): {
    schemas: Map<string, Buffer>;
    stats: PatchStats;
};
/**
 * Convert CloudFormation type name to cfn-lint patch directory name.
 * AWS::S3::Bucket → aws_s3_bucket
 */
export declare function typeNameToPatchDir(typeName: string): string;
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