Hi,

I was trying to implement the same thing, and I used new Date("<dateString>").valueOf() and used it with the existing operators.

In order to make the value attribute inside your conditions dynamic use the Fact() with asynchronous call to load you fact and inside the condition you can spcify it as follows:

let rule = new Rule({
 conditions: {
 all: [{
 fact: "TEST_FACT_01",
 operator: "equal",
 value: {
 fact: "TEST_FACT_02",
 }
 }]
 }
}

path and param helpers are availble inside the rule for both fact and value.

Reference: #274 (comment)