/**
 * Base class for dependency resolver errors
 */
export declare class DependencyResolverError extends Error {
    readonly cause?: Error | undefined;
    constructor(message: string, cause?: Error | undefined);
}
/**
 * Error thrown when a step is not found in the dependency graph
 */
export declare class StepNotFoundError extends DependencyResolverError {
    readonly stepName: string;
    readonly availableSteps: string[];
    constructor(message: string, stepName: string, availableSteps: string[]);
}
/**
 * Error thrown when a step depends on an unknown step
 */
export declare class UnknownDependencyError extends DependencyResolverError {
    readonly dependentStep: string;
    readonly dependencyStep: string;
    readonly availableSteps: string[];
    constructor(message: string, dependentStep: string, dependencyStep: string, availableSteps: string[]);
}
/**
 * Error thrown when a circular dependency is detected in the flow
 */
export declare class CircularDependencyError extends DependencyResolverError {
    readonly cycle: string[];
    constructor(message: string, cycle: string[]);
}