person.js

function Person() {
    
    // properties and validations
    attr(
        { id:Number, unique:true, nullable:false },
        { email:String, unique:true, nullable:false, min:1, max:55, format:'[a-b]' },
        { salt:String }, 
        { pswd:String },
        { active:Boolean, init:false },
        { tags:Array }
    );
    
    // helpful property declarations
    timestamp();
    
    // callbacks
    creating({ before:poundSalt, after:emailActivationCode });
    updating();
    deleting();

    // a private function to generate a unique salt for hashing the password, called in 'creating' callback
    // testable therefore by the creating callback?
    var poundSalt = function(obj) {
        
    };
    
    // emails an activation code 
    var emailActivationCode = function(obj) {
        
    };
    
    
    var forgotPassword = function(obj) {
        
    };
    
    // public instance attributes
    this.prototype = {
        // activates the user account
        get active() {

        },
        set active() {

        }        
    }
    
    // views, beautiful custom finders
    view('tags', { map:function(){}, reduce:function(){} });
    view('popular');
};

I left work so I actually do not remember how I made it sort work but essentially it was some runtime recompilation. Yes: evil. But this is just a thought experiment.

Another way would be to create a magical methods() method that accepts an obj for mixing into the __proto__. Meh.

The combinations of Proxy and Reflect make this sort of business pretty easy... I do hope those innovations make it into the language proper.

I created a fork with some style changes. Also I noticed the views section. What exactly do they do?