[Question] Plan for an Inverse Kinematics (IK) glTF Extension

[shawn0326]

Is there any plan or ongoing discussion to introduce an extension for inverse kinematics (IK) in glTF? Has anyone in the community expressed interest or started similar work?

Reason

Many 3D modeling tools provide IK editing features. If the joint connections and joint constraints could be exported directly for runtime use, it would greatly simplify workflows and improve interoperability. This proposal is not about a specific IK algorithm—the runtime could choose any implementation—but about standardizing the description of IK chains and constraints in glTF.

Any information, references, or suggestions would be appreciated. Thank you!

[Shinmera]

There is some amount of specification for IK constraints that could be done via AGI_articulations, but it does not allow specifying IK chains or targets, so it's not enough by itself.