JArchitect is able to tell the developer that over the past hour, the code just written has introduced debt that would cost for example about 30 minutes should it have to be repaid later. Knowing this, the developer can fix the code before even committing it to the source control. With JArchitect code rules are LINQ queries that can be created and customized in a matter of seconds. These queries contain formulas to compute accurate technical debt estimations. The default rule-set offers over a hundred code rules that detect a wide range of code smells including entangled code, dead-code, API breaking changes and bad OOP usage.