import type { ReadonlyFS } from "../types.js";
/**
 * Create a read-only filesystem abstraction rooted at the given path.
 * The adapter centralizes defensive filesystem handling because audit callers need stable null,
 * false, or empty-list results instead of platform-specific errno throws.
 *
 * @param rootPath Directory that relative fact reads resolve against.
 * @returns Cached, non-mutating filesystem helpers for audit and fact extraction.
 */
export declare function createFS(rootPath: string): ReadonlyFS;
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