Thoughts

What I feel or have learned about products.

Notes from building products for a living. Some are frameworks I use every week. Some are opinions I hold strongly. All of them come from something I shipped and what it taught me.

25 September 2026

Plumbing is easy. Filters are hard.

Building an AI product is plumbing: a model, some pipes, a user. That part has become easy. The filter, the evals that tell you the water is safe to drink, is where products live or die. Two products I shipped, one embarrassing number, and what I do differently now.

9 min readevalsai productsframeworks