Most of what determines whether a platform succeeds isn't in the platform. It's in the team. Engineering culture covers how decisions get made, how disagreements get resolved, how incidents get learned from, how the unwritten rules form, and how all of that interacts with the technical work.
These posts are about the parts of engineering that don't show up in architecture diagrams. Documentation that gets read versus documentation that gets written. Decision records that keep teams honest. The difference between being right and being effective. The operational habits that distinguish teams that ship from teams that stall.
If you've ever had a perfect technical proposal die in review, you already know why this category exists.