/**
 * Atlas Integrity Validation
 *
 * Validates the structural integrity of Atlas graphs to ensure:
 * - No orphaned nodes (all nodes reachable from at least one other node or are roots)
 * - No dangling edges (all edge endpoints exist in node set)
 * - Edge weights within valid range [0, 1]
 */
import type { Atlas } from "./rebuild.js";
/**
 * Validation result
 */
export interface ValidationResult {
    valid: boolean;
    errors: string[];
    warnings: string[];
}
/**
 * Validate Atlas integrity
 *
 * Performs comprehensive validation checks:
 * 1. No dangling edges (all edge endpoints exist in node set)
 * 2. No orphaned nodes (every node is reachable from at least one other node, or is a root)
 * 3. Edge weights within valid range [0, 1]
 *
 * @param atlas - Atlas graph to validate
 * @returns Validation result with errors and warnings
 */
export declare function validateAtlas(atlas: Atlas): ValidationResult;
/**
 * Check if all nodes in Atlas are reachable from at least one root node
 *
 * A root node is a node with no incoming edges (only outgoing edges or isolated).
 * This performs a graph traversal to ensure no nodes are unreachable from the root set.
 *
 * @param atlas - Atlas graph to check
 * @returns True if all nodes are reachable from roots, false otherwise
 */
export declare function checkReachability(atlas: Atlas): boolean;