The Last of Us 2 tool. Currently it can get all models with skeletons & textures.
Video with example model: https://youtu.be/Wr34rhWa3v8
There are 2 special switches for skeleton export:
/r - reparent helper bones. Helper bones are originally parented to other helper bones, and the whole helper set is then driven by famous naughty dog physics system. This option reparents them based on bone names, so this is incorrect way and thus not supported option. I dont guarantee that it will work any good so use this on your own risk.
/rs - only extract skeletons, and skip all other assets in PAK file, which is useful for skeleton preparing before anim conversion. Its called "rs" because it scans for skeletons, but also reparents helpers.
Tool also supports animations. Examples videos here: https://www.youtube.com/watch?v=cwPrcn-9i_Q https://www.youtube.com/watch?v=pZ3KrzEiyNM https://www.youtube.com/watch?v=6K1ax8pobEw