I wrote a blog post about targeted ads and generate video using sonnet 5.5 which turned out to be crazy

I wrote a blog post on how targeted ads work (the \~100 ms auction behind every ad you see). I wanted a short video for it, so I gave Claude Code one detailed prompt. It came back with this. No video editor, no stock assets, no MCPs or skills. It: * Planned a storyboard with timestamps for each scene * Drew everything in code: an original pixel mascot (a walking barcode that stands in for your phone's advertising ID), the phones and apps, bidder robots, and a 100 ms stopwatch * Gave it a hand-drawn "boiling line" sketch style, with fast cuts, zooms and impact frames * Rendered keyframe drafts first, then the full 1080p MP4 through ffmpeg, keeping the file size small The detail that got me: the stopwatch stops at exactly 0.100s as the winning ad loads. I asked for that timing, and it hit it. **What made the prompt work:** * **A locked facts list.** I told it "use only these, don't invent numbers," so every stat in the video comes from my article. * **A shot list with…