How product teams are building with AI.
Ben Horowitz wrote 'Good Product Manager, Bad Product Manager' in 2002. Here's the 2026 version — what separates great AI product managers from the rest, written in the same spirit as the original.
A PM operating system is the persistent infrastructure layer — context, skills, integrations, and intelligence — that makes every PM on your team consistently productive. Here's what it includes, how it differs from PM tools, and how to evaluate whether your team needs one.