{"ok":true,"mode":"synthetic_adversarial_regression_demo","synthetic":true,"defect":"JavaScript || changes legitimate zero into the default","before":[{"case":"missing uses the default","expected":5000,"actual":5000,"pass":true},{"case":"null uses the default","expected":5000,"actual":5000,"pass":true},{"case":"zero means disabled, not default","expected":0,"actual":5000,"pass":false},{"case":"explicit positive override","expected":50,"actual":50,"pass":true},{"case":"negative preserved for caller-side validation","expected":-1,"actual":-1,"pass":true}],"after":[{"case":"missing uses the default","expected":5000,"actual":5000,"pass":true},{"case":"null uses the default","expected":5000,"actual":5000,"pass":true},{"case":"zero means disabled, not default","expected":0,"actual":0,"pass":true},{"case":"explicit positive override","expected":50,"actual":50,"pass":true},{"case":"negative preserved for caller-side validation","expected":-1,"actual":-1,"pass":true}],"negative_control":"The original version fails the previously missing zero boundary case.","positive_control":"The corrected version passes that same case.","note":"Synthetic demo only; no external PR code or sandbox test was performed."}