AI Overlay for HackerRank Tests and CodePair on Mac
HackerRank is the default coding-assessment vendor for a long list of US tech employers. You will see it as an async Test (take-home, usually 60-90 minutes) or as CodePair, the live interview product. Both run in Chrome and use a similar behavioral proctoring stack.
HackerRank was founded in 2009 by Vivek Ravisankar and Hari Karunanidhi (originally as InterviewStreet, rebranded after Y Combinator Summer 2011) and is now headquartered in Mountain View. The platform measures three things: algorithmic correctness via test cases, code quality via static analysis, and behavioral signals via proctoring. Tab proctoring is the headline anti-cheat feature: HackerRank logs every tab focus loss, full-screen exit, and window blur, then flags the candidate report.
HackerRank infers AI use from indirect signals: paste events, abnormally fast solve time, tab switches, and code similarity to known model outputs.
The overlay is invisible to the recording and to the interviewer screen-share view. The risk is human: if you stare at one corner of your screen for long stretches, an alert interviewer notices.
Audio recording on CodePair captures whatever your microphone hears. Use a headset or text mode for live interviews.
Most employers explicitly prohibit AI on real assessments. We strongly suggest using the overlay for LeetCode and HackerRank practice problems.
HackerRank cannot enumerate macOS processes from a Chrome tab.
Need reference access during your exam?
Fracture runs a native floating overlay that sets the macOS window privacy flag. It is 100% excluded from screen capture feeds, window lists, and proctor recordings.