# Jumper – Cute Crab Robot

> Source: <https://github.com/KingKongRobotics/jumper>
> Published: 2026-10-04 18:23:54+00:00

**English** | [简体中文](https://github.com/KingKongRobotics/jumper/blob/main/README.zh.md)

Design appearances. Train motions. Create worlds for **Jumper**, a 22-DoF crab robot. [View hardware →](https://github.com/KingKongRobotics/jumper/blob/main/docs/HARDWARE.md)

Open this repository in an AI coding assistant and describe what you want in one sentence. The linked projects and guides below give your assistant the workflows to follow.

🦀 **Get a free Jumper!** [Find out how →](https://beunlimited.me/zh/events/crab-robot-challenge-2026)

Design a warm sand ranger appearance for Jumper with coordinated body and limb colors, then export a `.skin`.

| [**Warm sand ranger**](https://github.com/KingKongRobotics/jumper-design/blob/be74e0f2e5e2433d24a3a7b1c1aa0dbeae480356/library/skins/warm-sand-ranger-integrated-v2.skin) | [**Silver armor**](https://github.com/KingKongRobotics/jumper-design/blob/be74e0f2e5e2433d24a3a7b1c1aa0dbeae480356/library/skins/mecha-tripo-v3.skin) | [**Raphael Turtle**](https://github.com/KingKongRobotics/jumper-design/blob/be74e0f2e5e2433d24a3a7b1c1aa0dbeae480356/library/skins/raphael-turtle-v1.skin) | 

Train a stable tripod gait for Jumper, replay and evaluate the result, then package it as an `.app`.

| **Walk** | **Posture** | **Gesture** | 
| **Dance** | **Jump** | **Grasp** | 

Create a park pump-track scene for Jumper with rolling terrain, trees and benches, then export a `.map`.

| [**Park pump track**](https://github.com/KingKongRobotics/jumper-design/blob/be74e0f2e5e2433d24a3a7b1c1aa0dbeae480356/library/maps/park-pump-track.map) | [**Bedroom**](https://github.com/KingKongRobotics/jumper-design/blob/be74e0f2e5e2433d24a3a7b1c1aa0dbeae480356/library/maps/bedroom.map) | [**Soccer**](https://github.com/KingKongRobotics/jumper-design/blob/be74e0f2e5e2433d24a3a7b1c1aa0dbeae480356/library/maps/soccer.map) | 

| Resource | Purpose | 
|---|---|
| [jumper-design](https://github.com/KingKongRobotics/jumper-design) | Appearance and scene creation; your assistant reads its [instructions](https://github.com/KingKongRobotics/jumper-design/blob/main/AGENTS.md) and uses its tools as needed. | 
| [Training tutorial](https://github.com/KingKongRobotics/jumper/blob/main/docs/TUTORIAL.md) | Motion training, replay and policy export in this repository. | 
| [Motion bundles](https://github.com/KingKongRobotics/jumper/blob/main/deploy/BUNDLE.md) | Package trained motions and their controller as an `.app` ; see the[build guide](https://github.com/KingKongRobotics/jumper/blob/main/deploy/README.md) for prerequisites. | 
| [Project guide](https://github.com/KingKongRobotics/jumper/blob/main/docs/PROJECT_GUIDE.md) | Setup, current capabilities and further documentation. | 

Training builds on [mjlab](https://github.com/mujocolab/mjlab),
[rsl_rl](https://github.com/leggedrobotics/rsl_rl), [MuJoCo](https://github.com/google-deepmind/mujoco)
and [MuJoCo Warp](https://github.com/google-deepmind/mujoco_warp).
Example appearance and scene images come from jumper-design; [image sources](https://github.com/KingKongRobotics/jumper/blob/main/docs/media/DESIGN_SOURCES.md)
and [third-party notices](https://github.com/KingKongRobotics/jumper/blob/main/NOTICE) record attribution.

Copyright 2026 KingKong Robotics.

Maintainer-owned project materials are licensed under Apache-2.0. See [LICENSE](https://github.com/KingKongRobotics/jumper/blob/main/LICENSE),
[NOTICE](https://github.com/KingKongRobotics/jumper/blob/main/NOTICE), and [licensing details](https://github.com/KingKongRobotics/jumper/blob/main/docs/PROJECT_GUIDE.md#license).
Third-party materials remain under their respective terms, and generated outputs do not
automatically inherit this repository's license.