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OpenAICodex app

Custom prompts deprecated

Thursday, 22 January 2026

In short

From the official notes.

Custom prompts are now deprecated. Use skills for reusable instructions and workflows instead.

Official notes on developers.openai.com

Full release notes

Custom prompts are now deprecated. Use skills for reusable instructions and workflows instead.

Older · Dec 19, 2025Agent skills in Codex Newer · Jan 23, 2026Team Config for shared configuration