export type PillBox = {
    left: number;
    right: number;
};
export type PillTargetResolution = {
    /** Apply as the pill's inset target. `null` = leave current target alone. */
    commit: PillBox | null;
    /** Stash for landing. `null` = nothing pending. */
    pending: PillBox | null;
};
/**
 * While the pill is flying, measurements must not retarget insets
 * (that restarts the CSS transition and elongates the pill).
 * Outside flight, commit only when the measured box actually changed.
 */
export declare const resolvePillTarget: (current: PillBox | null, measured: PillBox, isFlying: boolean) => PillTargetResolution;