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  1. Behind the Craft
  2. How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain
How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

Behind the Craft · Apr 5, 2026

OpenAI's Codex team reveals how they build with their own AI, embracing minimal specs, rapid iteration, and a future of agentic delegation.

A Product Manager's Role Is to "Fill in the Gaps," Not Act as a Formal Leader

On the Codex team, the PM role is not seen as a traditional leadership position. Instead, it's a support function focused on doing whatever is necessary—bridging gaps, coordinating, and sometimes criticizing—to help the team succeed, rather than directing strategy from the top.

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain thumbnail

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

Behind the Craft·11 hours ago

AI Tools Are Blurring Traditional Career Ladders into a Single "Builder" Role

AI agents empower individuals to perform tasks outside their core roles. At OpenAI, designers now write significant code, and PMs build functional prototypes. This blurs the lines between engineering, design, and product, unifying them under the umbrella of being "builders."

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain thumbnail

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

Behind the Craft·11 hours ago

OpenAI Hires for "Agency" by Prioritizing Project Links Over Resumes

The Codex team values "agency"—the quality of being a self-starter who proactively builds things. When recruiting, they are far more likely to engage with candidates who share links to their work and ideas than those who simply submit a traditional resume.

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain thumbnail

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

Behind the Craft·11 hours ago

OpenAI's Codex Team Replaces Detailed Specs with Short, 10-Bullet-Point Docs

The team writes very few specifications. When a spec is necessary for complex projects, it's incredibly brief—often just ten bullet points. This approach prioritizes speed and gives more autonomy to the people closest to the code, empowering them to make decisions.

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain thumbnail

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

Behind the Craft·11 hours ago

With Powerful AI Agents, The Bottleneck Shifts from Coding to High-Level Decision-Making

As AI becomes proficient at generating code, the critical human skill is no longer writing the code itself. Instead, the focus shifts to deciding *what* to build and maintaining a high standard of quality for the AI-generated output. The key contribution becomes strategic direction and taste.

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain thumbnail

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

Behind the Craft·11 hours ago

The Codex App Uses "Progressive Disclosure" to Onboard Users to Complex Features

The app is designed to feel simple initially, like a chat interface. It then gradually reveals advanced features like a sidebar for multiple tasks and a skills tab. This approach makes complexity discoverable over time, like playing a game, preventing new users from being overwhelmed.

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain thumbnail

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

Behind the Craft·11 hours ago

Product Managers Shouldn't Own or Maintain Features Because They Need to Be Distractible

Alex from OpenAI argues against PMs taking long-term ownership of features. A PM's value comes from being able to move around and tackle various issues across the product, making them unsuitable for the focused, stable ownership required to maintain critical systems.

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain thumbnail

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

Behind the Craft·11 hours ago

OpenAI's Codex Team Plans Near-Term (8 Weeks) and Long-Term (1 Year+), Ignoring Medium-Term Roadmaps

The team avoids traditional product roadmaps, which they find awkward and difficult. They focus on concrete 8-week sprints for immediate goals and a high-level "vibe" for their long-term vision. The medium-term is considered too unpredictable to plan effectively.

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain thumbnail

How OpenAI's Codex Team Builds with Codex (43 Min) | Alex & Romain

Behind the Craft·11 hours ago