GPT-5.6 prompt guide: write fewer steps, define clearer deliverables

GPT-5.6 的新提示指南：prompt 该少写什么，多写什么

OpenAI's July 22 guidance for GPT-5.6 tells developers to strip hand-written intermediate steps from prompts and instead constrain agents with completion criteria, verification evidence, and permission boundaries. The recommended method is ablation testing on eval sets—remove a section, rerun, and keep it only if metrics hold. This reverses the GPT-4.1 era of hard-coding eight-step workflows into system prompts. GPT-5 had already started loosening route control by scene. The author validated the approach in a long-form translation system, replacing chunking and retry logic with deliverable specs that let the agent decide its own execution path.

Why it matters: Connects three generations of OpenAI prompt guides into a coherent engineering narrative with concrete methodology (ablation testing), not generic advice. Score capped here because it's a secondary analysis of official docs rather than a primary release, and the excerpt doesn'...