import type { XpbdIncrementalPotentialDirectionPolicyN, XpbdIncrementalPotentialDirectionPolicyNameN } from './xpbd-incremental-potential-direction.js';
import type { XpbdIncrementalPotentialProblemN } from './xpbd-incremental-potential-problem.js';
interface XpbdIncrementalPotentialStepDirectionChoiceN {
    readonly directionPolicy?: XpbdIncrementalPotentialDirectionPolicyN | XpbdIncrementalPotentialDirectionPolicyNameN;
    readonly directionPolicyFactory?: (problem: XpbdIncrementalPotentialProblemN) => XpbdIncrementalPotentialDirectionPolicyN;
}
/**
 * Resolves the direct or problem-dependent direction seam for an integrated step.
 *
 * Kept outside the step module so both public policy fields have an explicit
 * consumer and one place owns their mutual-exclusion invariant.
 */
export declare function resolveXpbdIncrementalPotentialStepDirectionN(policy: XpbdIncrementalPotentialStepDirectionChoiceN | undefined, problem: XpbdIncrementalPotentialProblemN, caller: string): XpbdIncrementalPotentialDirectionPolicyN | XpbdIncrementalPotentialDirectionPolicyNameN | undefined;
export {};
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