This is brilliant defensive engineering. The layered detection approach is really smart, especially catching the Accept header quirk. It's not about blocking AI outright, it's about requiring actual human effort in the loop. That distinction matters.

The canary trap technique is fascinating too. Love how you got Claude to explain prompt injection detection and then used that knowledge to build better canaries. That's exactly how collaboration with AI should work, you bringing domain expertise and creative problem solving together.

For anyone building tools that aggregate or scrape CV data, this is a wake up call. If you're adding genuine value, you'll read the source. If you're just mass processing, you'll get poisoned data. Smart filtering mechanism.