/**
 * Small AWS ARN / ECR URI parsing helpers used by the ECS agent feature.
 *
 * The region for each AWS SDK client is derived deterministically from the
 * resource the caller is operating on (ECR repository URI or ECS cluster ARN)
 * instead of relying on ambient AWS_REGION configuration.
 */
/**
 * Extract the region from an AWS ARN.
 * Example: arn:aws:ecs:ap-northeast-1:123456789012:cluster/my-cluster -> ap-northeast-1
 * Returns null when the string is not a valid ARN or has no region part.
 */
export declare function regionFromArn(arn: string): string | null;
export interface EcrRepositoryUriParts {
    /** Registry host, e.g. 123456789012.dkr.ecr.ap-northeast-1.amazonaws.com */
    registry: string;
    /** AWS account id of the registry */
    accountId: string;
    /** Region parsed from the registry host */
    region: string;
    /** Repository name (path after the registry host) */
    repositoryName: string;
}
/**
 * Parse an ECR repository URI of the form
 * `{accountId}.dkr.ecr.{region}.amazonaws.com/{repositoryName}`.
 * Returns null when the URI does not look like an ECR repository URI.
 */
export declare function parseEcrRepositoryUri(uri: string): EcrRepositoryUriParts | null;
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