/**
 * HumanoidSkeleton.ts
 *
 * 65-bone humanoid skeleton template compatible with VRM, Mixamo,
 * Ready Player Me, Apple ARKit, and Unreal MetaHuman.
 *
 * Hierarchy:
 *   root → hips → spine chain → neck/head (+ FACS bones)
 *                → shoulder → arm → forearm → hand (+ 15 finger bones)
 *                → upper_leg → lower_leg → foot → toes
 *
 * @see W.244: Seven-stage pipeline enables single-source multi-platform deploy
 * @see P.CHAR.004: Multi-Platform Export
 * @module character
 */
export interface BoneDefinition {
    name: string;
    parent: string | null;
    /** Local-space position relative to parent */
    position: [number, number, number];
    /** Bone length in meters */
    length: number;
    /** Rotation limits in degrees [minX, maxX, minY, maxY, minZ, maxZ] */
    rotationLimits?: [number, number, number, number, number, number];
}
export declare const HUMANOID_BONE_NAMES: readonly ["root", "hips", "spine", "spine1", "spine2", "neck", "head", "left_shoulder", "left_upper_arm", "left_forearm", "left_hand", "left_thumb_proximal", "left_thumb_intermediate", "left_thumb_distal", "left_index_proximal", "left_index_intermediate", "left_index_distal", "left_middle_proximal", "left_middle_intermediate", "left_middle_distal", "left_ring_proximal", "left_ring_intermediate", "left_ring_distal", "left_pinky_proximal", "left_pinky_intermediate", "left_pinky_distal", "right_shoulder", "right_upper_arm", "right_forearm", "right_hand", "right_thumb_proximal", "right_thumb_intermediate", "right_thumb_distal", "right_index_proximal", "right_index_intermediate", "right_index_distal", "right_middle_proximal", "right_middle_intermediate", "right_middle_distal", "right_ring_proximal", "right_ring_intermediate", "right_ring_distal", "right_pinky_proximal", "right_pinky_intermediate", "right_pinky_distal", "left_upper_leg", "left_lower_leg", "left_foot", "left_toes", "left_toe_end", "right_upper_leg", "right_lower_leg", "right_foot", "right_toes", "right_toe_end"];
export type HumanoidBoneName = (typeof HUMANOID_BONE_NAMES)[number];
/** Average adult male proportions (1.75m height). */
export declare const HUMANOID_65_SKELETON: BoneDefinition[];
/** Maps HumanoidBoneName → Mixamo bone name for animation retargeting. */
export declare const MIXAMO_BONE_MAP: Partial<Record<HumanoidBoneName, string>>;
/** Maps HumanoidBoneName → VRM 1.0 humanBones key. */
export declare const VRM_BONE_MAP: Partial<Record<HumanoidBoneName, string>>;
/** Maps HumanoidBoneName → standard URDF joint name for humanoid robots. */
export declare const URDF_BONE_MAP: Partial<Record<HumanoidBoneName, string>>;
/**
 * Get all children of a bone in the skeleton hierarchy.
 */
export declare function getBoneChildren(boneName: string, skeleton?: BoneDefinition[]): BoneDefinition[];
/**
 * Get the chain of bones from root to target bone.
 */
export declare function getBoneChain(boneName: string, skeleton?: BoneDefinition[]): BoneDefinition[];
/**
 * Validate that a skeleton definition has no orphaned bones.
 */
export declare function validateSkeleton(skeleton: BoneDefinition[]): {
    valid: boolean;
    errors: string[];
};
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