I Built My Own Tiny ATS to Stress-Test the "AI Scoring" Resume Advice — Here's What Held Up and What Didn't

I Built My Own Tiny ATS to Stress-Test the "AI Scoring" Resume Advice - Here's What Held Up and What Didn't Follow-up to Your Job Application Is Being Scored by AI and I Reverse-Engineered 5 ATS Systems. Both posts are based on testing real resumes against real ATSes. But there's only so much you can learn from the outside. So I built a tiny ATS scorer myself - semantic match + keyword density + section parser - and ran 50 resumes through it. Here's what the conventional advice gets right, what it gets wrong, and what nobody is saying.