type SandboxFilesystemPolicyBuildInput = {
    writeDirs: string[];
    workingDir?: string;
    homeDir?: string;
    platform?: NodeJS.Platform;
};
type SandboxFilesystemPolicy = {
    denyRead: string[];
    allowWrite: string[];
    denyWrite: string[];
};
/**
 * Builds sandbox filesystem policy with read/write deny-lists.
 * Expects: permissions paths are already absolute and normalized.
 */
export declare function sandboxFilesystemPolicyBuild(input: SandboxFilesystemPolicyBuildInput): SandboxFilesystemPolicy;
export {};
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