'Like handing out the blueprint to a bank vault': Why AI led one company to abandon open source

Cal.com is shifting its commercial product from AGPL open-source to a proprietary license because executives fear modern AI models can automatically analyze public code to find vulnerabilities; the article cites Mythos' ability to find a security hole in OpenBSD, includes expert commentary that open-source apps may be easier to exploit with AI, and notes Cal has published a hobbyist open-source fork (Cal.diy) while keeping production code closed to protect customer data.