Interesting... but I see no information about react/graphql use to code this photoshop plugin!!! THAT would be really interesting. Is the source code available anywhere? Is this plugin a "standard" C++ plugin with a browser built-in loaded with react/graqhql?
Adobe CEP HTML Engine is based on Chromium Embedded Framework (CEF) version 3. It includes also a version of IO.js under the hood. Despite of it's now merged back with the Node.js project, developers have access to browser, but to entire stack of "server" technologies also.