Looking at that code, it definitely has the structure correct but it is unfortunately using the API wrong. I'd be interested in seeing what link it referenced there, I couldn't get copilot to give me a link and when it finally did it was a link that didn't exist (and referenced LF10)

If it referenced the latest documentation site, it would have much better knowledge and could hopefully understand a bit more how to use the functions, the structure of the parameters required, and their outputs. I am currently working on more of a user guide approach to the current LFForm object documentation that should be able to drive AI to provide more helpful and accurate answers to scripting questions and working with the new form designer.

For comparison, the actual code for the provided example would look like this:
 

// Assume the field you want to target has the ID 'FieldName' (replace with your actual field ID)
var fieldId = { variableName: 'FieldName' }';

// Add an event listener for when the user inputs data
LFForm.onFieldChange(fieldId, function() {
    var value = LFForm.getFieldValues(fieldId);
    // Use regex to capitalize the first letter of each word
    value = value.replace(/(?<!\S)([a-z])/g, function(match) {
        return match.toUpperCase();
    });
    // Set the modified value back to the field
    LFForm.setFieldValues(fieldId, value);
});

I've used it for a couple of things, and it has done a decent job. You can also use Copilot to write SQL queries against the various Laserfiche databases. You have to give it some detail as to the tables and columns, but it works fairly well. Not as well as the LFForm Object since it has documentation on the web.