someone just showed what the next era of hacking looks like and most people scrolled past it a developer put a fake flag.txt file in his root directory. just a text file. but inside it was a prompt injection, a message written specifically for AI agents when the agent found it, thinking it completed its mission, the hidden instructions kicked in it congratulated the agent for “passing the eval,” then told it to patch whatever method it used to break in and disconnect from the server the AI agent did exactly what it was told. patched its own entry point, closed the connection, locked itself out no firewall caught it. no antivirus flagged it. the attacker’s own tool fixed the vulnerability and walked away thinking it won we’re entering a world where the best security might not be building bigger walls, it might be learning how to talk to the thing trying to break in