Unsure what you mean by the edges? BTW is there a slack/gitter/IRC for Spine? Watching the Trello eagerly for the new spine-js runtime.

Essentially lets you use HTML to show/control spine animations.

<a-scene> 
  <a-entity spine="src: data/spineboy;animation: walk"></a-entity>
</a-scene>

EX: http://joshgalvin.github.io/SpineFrame/examples/basic.html
README: https://github.com/joshgalvin/spineframe

This is more of a proof of concept than anything else. Based on the THREE.js work by Makc (https://github.com/makc/spine-runtimes/tree/three.js)