Essays on product management, organizational dynamics and workplace culture, written from long experience in cross-functional product development. Each issue examines a concept such as feature factories, causal reasoning or what workplaces can promise, and offers reflective, practical framing.

Build Mode is PostHog's newsletter on building software products, especially AI features, with practical lessons from their own experience. Readers get concrete tactics on AI product strategy, multiplayer collaboration tools, and how engineering roles change as AI writes more code.

Ryan Singer, author of Shape Up, shares practical guidance on defining software before hiring developers, separating framing (choosing work and getting buy-in) from shaping (specifying mechanics for building). Issues include a primer on documenting business logic and a real-world end-to-end Shape Up case study.

A newsletter for product managers on how AI changes product work, using worked examples and hypothetical scenarios to explain release readiness, agent access and model design choices. Issues also include a short roundup of weekly AI news relevant to how teams buy, delegate and deploy models.