The Missing Interface in AI-Generated Animation Is seek(t)

Why a deterministic scene contract matters more than asking a model for “a video.” When people say a language model “made a video,” the model often did something more specific: it wrote code for a scene, then a renderer turned that code into frames. That distinction...

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What Gut Health Wearables Can and Can’t Measure

A new wearable comes along every few months, promising to analyze something from your body that once required a lab. It started with sleep, then moved on to stress, and now it’s your gut. To be honest, the first time I saw a company claim that its device could measure...

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Everyone Wants FDEs But Almost Nobody Is Using Them Right

Everyone Wants FDEs But Almost Nobody Is Using Them Right

Two years ago I joined HappyRobot as the first FDE hire, before the role was even called FDE. Since then I've seen the company scale to 60 FDEs and to a $1.2B valuation. In that time, "FDE" went from a word I had to explain in every interview to one of the hottest...

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How Shallow and Deep Copies Work in Python

A few weeks ago I was testing a small feature nothing fancy, just duplicating a dictionary before running an update, the way you're taught to "be safe." I only touched the copy. And somehow, the original changed too. I hadn't touched it. I hadn't reassigned it. It...

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