Dispatch
OpenAI repositioned Codex from a coding agent to an embeddable agent runtime, five days after DeepSeek open-sourced its own
OpenAI's August 19 developer post "Codex as a platform: build on the open agent harness" tells developers to build their own applications on the same harness that powers the Codex app, CLI and IDE extensions, with the harness owning session state, context, tool calls, sandboxes and human approvals while the calling application owns interface and policy. Three integration paths are offered: `codex exec` for noninteractive jobs, the Codex SDK, and app-server. Cited deployments include Cisco building an App Builder inside its cloud control platform, and tax partners Thrive Holdings and Crete processing 7,000 returns with roughly a third less preparation time.
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