tuck-jump

name	tuck-jump
description	Performs a tuck jump, leaping straight up and pulling both knees high to the chest at the apex, via a sequence with a root.y arc. Use when a command mentions tuck jump, knees-to-chest jump, tuck your knees jumping, or jump and tuck.
category	locomotion
disable-model-invocation	true
subskills	["bend-knees","move-leg"]

tuck-jump

Vertical jump pulling both knees to the chest at the top, then land soft.

Composes: bend-knees + move-leg

How

• Use a sequence with loop:false. Crouch (root.y~-0.18), apex with knees tucked high (UpLeg/Leg~120, root.y~0.45), land (legs to rest).
• durationMs ~1000.

Example

• "do a tuck jump" -> {"durationMs":1000,"say":"Tuck!","sequence":{"loop":false,"frames":[{"t":0,"pose":{"LeftUpLeg":[40,0,0],"LeftLeg":[60,0,0],"RightUpLeg":[40,0,0],"RightLeg":[60,0,0]},"root":{"y":-0.18}},{"t":0.5,"pose":{"LeftUpLeg":[120,0,0],"LeftLeg":[120,0,0],"RightUpLeg":[120,0,0],"RightLeg":[120,0,0]},"root":{"y":0.45}},{"t":1,"pose":{"LeftUpLeg":[0,0,180],"LeftLeg":[0,0,0],"RightUpLeg":[0,0,180],"RightLeg":[0,0,0]},"root":{"y":0}}]}}

Limits & posture

Keep ≥1 foot grounded except at a jump's airborne apex; stay inside human joint ranges and keep weight over the support — see balance-and-posture.