
The Codex Changelog · Friday
ExternalMessage, Ultra Reasoning, and HookMetadata Changes
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We break down OpenAI Python SDK 0.154.0 for Codex, including ExternalMessage for injecting live context from CI, webhooks, and telemetry into active runs, plus the security implications of tool-level authority. The episode also covers late-attaching turn handles, ultra reasoning effort, tiered service control, HookMetadata breaking changes, selective history loading, and other upgrade notes.