How OpenAI Engineers Work Now: Codex Everywhere, Open Harnesses and Security Swarms

OpenAI's developer blog shows engineers deleting 800,000 lines of dead code with Astra, running evals through agent notebooks, and open-sourcing the Codex harness. This episode distills the engineering culture signals from the last year of posts and what they imply for coding, design and 'how have you used AI' questions.