Howdy!
Photoshop just added support for OpenColorIO (in version 26.0), a feature that was long-awaited by the VFX/Animation community and industry.
The integration of OCIO into Photoshop apparently meant introducing a new dedicated file type/mode, representing OCIO-based Photoshop files opposed to regular ones. Another necessity of the implementation was to rely more heavily on smart layers. You can follow the corresponding discussion/reasoning in the responses here.
It would be fantastic if the Photoshop UXP API (and documentation) could be updated to support the new OCIO features. For proper pipeline integration it would help to have at least a way to find out if a document is of type OpenColorIO and to access/change the corresponding color settings. As a bonus point it would be amazing if better support for placing and editing smart layers could be added. (Yes, I know that a lot of this can be accessed via batchPlay 
).
Thanks a lot!