OpenAI recommends that developers use leaner prompts and fewer guardrails with GPT-6 Astra, according to guidance from OpenAI's Eric Provencher. He advises reviewing skills, AGENTS.md files, and task prompts when switching models, since accumulated instructions can consume context or cause premature stopping. Vague skill descriptions can lead Codex to select the wrong skill, and blanket reading requirements waste context. Provencher also recommends defining clear completion criteria upfront, as Astra may stop earlier than previous models.
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