Approval Flows

Codex as a platform: build on the open agent harness | OpenAI Developers

OpenAI open-sources the Codex harness—the execution layer behind Codex app, CLI, and IDE extensions—so developers can embed agent loops into existing products instead of forcing users into a generic chat box. The harness handles context, tool use, approval flows, and sandboxing; developers control the interface, business logic, and integration. Real implementations already shipping: GitHub, JetBrains, Cisco, tax-prep workflows. Justy sees a product win (agent-native integration beats chat-box retrofit); Cody questions whether the harness abstraction actually reduces integration complexity or just moves friction around.