Callum van den Enden
Product leader who ships production AI systems.
Currently founding hey anna, an analyst that tells you why your numbers moved. Before that, I repositioned a consumer tool into a $1M ARR enterprise business, led UK market entry from $20M to $60M in 12 months at Luxury Escapes, and much more over the journey.
Latest essays
- Context pruning is a bet on the future When an agent's window fills, the obvious move is to drop the oldest, biggest tool results. That's a cache-eviction bet you can't make optimally without seeing the future, and the right one depends entirely on your workload.
- Google wins consumer AI on distribution Intelligence is commoditising, so the model stops being the moat. What's left is distribution and a business that profits from giving intelligence away, and Google is the only company with both - fighting Nvidia, Apple, Amazon, Microsoft and Meta each on one front while it works all five.
- Mechanistic interpretability as generative art If a network has learned a concept, that concept is a location in its embedding space. Steer a generator toward that location and you don't get a diagram of what the model knows - you get a picture of it.
- AI is an interface The interface was always the tax you paid to use a system: its menus, its query language, its API. AI's most durable job is to take that tax off, by turning plain language into the task you meant and the systems that carry it out.
- Three gaps: coverage, synthesis, intent Most AI insights requests get treated as a synthesis problem. That's the wrong reframe. There are three stacked gaps - coverage, synthesis, intent - and you can't skip a layer without trust collapsing underneath you.