Worked on enhancing the stability of the 3D ChainIK feature within the godotengine/godot repository, focusing on the core inverse kinematics pipeline. Addressed a critical robustness issue by implementing a defensive guard in the ChainIK3D._update_mutable_info function, ensuring that processing exits early when encountering an invalid skeleton. This approach prevents unnecessary updates and reduces the risk of crashes, streamlining future maintenance of the codebase. Utilized C++ and 3D graphics programming skills to improve error handling in game development contexts. The work contributed to a more reliable 3D animation system by safeguarding against invalid data during inverse kinematics updates.