The newly released skill kit to build your own Now Assist (Gen AI) skills is amazing. If you had that chance to test it already, I'm sure you agree! :)

The newly created skill can then be used via a UI action in your forms. This means you may also want to store the output from the LLM in a field on your form.

An easy way is to already apply a postprocessing script first in the skill kit:

(function(payload) {
var response = JSON.parse(payload.response);
payload.response[0] = response["model_output"];
return payload;
})(payload);

And then, in your UI Action, you can add directly in the try part:

var returnObj = sn_one_extend.OneExtendUtil.execute(request);
current.u_custom_field = returnObj.capabilities["capabilitySysId"].response;
current.update();

Please also replace the "capabilitySysId" with the sysId of your capability. You find it in the generated UI action.
You can then also replace the 'u_custom_field' with the field on your form you want to save the output into. For one skill I told the LLM to output me HTML and saved it into a HTML field. Worked very well!

Happy coding! :)