Agent Skills: gpt-prompting

Prompt patterns, reusable system-prompt blocks, and a migration checklist for GPT-5.2 (GPT-5-class) models. Use when you need to (1) write/refine prompts for GPT-5.2 production agents, (2) clamp verbosity/output shape, (3) prevent scope drift (esp. frontend/UX and over-building), (4) handle ambiguity and reduce hallucinations, (5) improve tool grounding + structured extraction, or (6) migrate prompts from GPT-5/5.1/4.1/4o to GPT-5.2 with stable reasoning_effort.