Harness engineering: leveraging Codex in an agent-first world

kept by eddie feb 12

OpenAI's team built a production-grade codebase entirely via Codex agents, finding that engineering shifts from writing code to designing agent-legible environments, feedback loops, and architectural guardrails.

Inside OpenAI’s in-house data agent
OpenAI built an internal AI data agent using GPT-5, Codex, and memory to reason over massive datasets, delivering insights in minutes.
also on GPT-5, Codex, OpenAI, #ai-agents, #productivity, #developer-tools
A Practical Approach to Verifying Code at Scale
OpenAI's automated code reviewer, part of GPT-5 Codex, prioritizes precision over recall to catch critical bugs with minimal false alarms, deployed at scale internally and on GitHub.
also on GPT-5, Codex, OpenAI, #ai-coding, #software-engineering, #developer-tools