export interface CollisionResult {
    collides: boolean;
    colliderPath: string | null;
}
/**
 * Detect whether a `forge` binary other than ourselves is on PATH.
 *
 * Collision = `which forge` resolves to a path whose realpath is NOT under
 * the same ancestor directory as `process.argv[1]` (our own binary).
 *
 * Uses `spawnSync("which", ["forge"])` with argv array — Iron Law 6.
 * Returns `{ collides: false, colliderPath: null }` on any error.
 */
export declare function detectFoundryCollision(): CollisionResult;
/**
 * Returns true if this collider path has already been dismissed by the user.
 * Returns false on any error (conservative: show the notification again).
 */
export declare function wasCollisionSeen(colliderPath: string): boolean;
/**
 * Mark a collider path as seen so the one-time notification is not repeated.
 * Silent no-op on any error.
 */
export declare function markCollisionSeen(colliderPath: string): void;