Agents And SkillsSkill

Codex app server for building agentic apps

April 5, 2026Greg Brockman, Peter Yang, Lee Robinson

Greg Brockman promotes the Codex app server as a way to build agentic applications, while Peter Yang previews an inside look at how the Codex team ships products around this ecosystem.

Codex app server makes it easy to build your own agentic apps:
This weekend, I'm sharing a rare inside look at how OpenAI's Codex team ship products, including:
Codex app is nice! There's a lot of differences once you start using it more (namely full integration with editing files, LSPs, multi-model, etc).
Codex App Server is completely open source.
when is the first video game on steam where the npcs are powered by the codex app server?
Codex app server makes it easy to build your own agentic apps
Greg Brockman
Peter Yang
Lee Robinson
jason liu
coding agentsdeveloper toolsopenaicodexopen source

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