AnalysisDevelopersAugust 27, 2026

OpenAI's Codex client reveals GenUI interface platform

RuntimeWire reverse-engineered OpenAI's Codex desktop client, finding an undocumented GenUI architecture for structured conversational interfaces and a bundled catalog of 467 'Learning Block' types. The client includes a refresh_widget endpoint, suggesting OpenAI is building a first-party interface platform inside ChatGPT.

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