/**
 * Backend-agnostic pose types.
 *
 * MoveNet backends emit the 17-point COCO topology. Apple Vision
 * (`VNDetectHumanBodyPoseRequest`) emits those 17 plus two extras
 * (`neck`, `root`) — see `VISION_EXTRA_KEYPOINT_NAMES` and
 * docs/NATIVE_POSE_BACKENDS.md. Downstream engine code that only knows
 * COCO safely ignores unknown names.
 */
export type CocoKeypointName = 'nose' | 'left_eye' | 'right_eye' | 'left_ear' | 'right_ear' | 'left_shoulder' | 'right_shoulder' | 'left_elbow' | 'right_elbow' | 'left_wrist' | 'right_wrist' | 'left_hip' | 'right_hip' | 'left_knee' | 'right_knee' | 'left_ankle' | 'right_ankle';
/** Extra joints from Apple Vision body pose (not in COCO-17 / MoveNet). */
export type VisionExtraKeypointName = 'neck' | 'root';
export type KeypointName = CocoKeypointName | VisionExtraKeypointName;
export declare const COCO_KEYPOINT_NAMES: readonly CocoKeypointName[];
/** Vision-only joints appended after the COCO-aligned 17. */
export declare const VISION_EXTRA_KEYPOINT_NAMES: readonly VisionExtraKeypointName[];
/** Full Apple Vision body-pose set (19): COCO-17 + neck + root. */
export declare const VISION_KEYPOINT_NAMES: readonly KeypointName[];
export interface Keypoint {
    name: KeypointName;
    /** Horizontal position, normalized to [0, 1] relative to the input image width. */
    x: number;
    /** Vertical position, normalized to [0, 1] relative to the input image height. */
    y: number;
    /** Optional depth (reserved for future 3D-capable backends). */
    z?: number;
    /** Confidence score in [0, 1]. */
    score: number;
}
export interface Pose {
    keypoints: Keypoint[];
    /** Overall pose confidence in [0, 1] (mean of keypoint scores for MoveNet). */
    score: number;
    /** Capture timestamp in milliseconds (host clock). */
    timestampMs: number;
}