Official prompting guides from the major AI providers — practical references for writing effective prompts.
OpenAI – GPT-4.1 prompting guide
OpenAI’s official guide to prompting GPT-4.1: instructions, agentic workflows, long context, and tool use.
Google – Gemini for Workspace prompt guide
A practical prompting handbook for Gemini in Google Workspace (October 2024 edition), with role-based examples.
Google – Prompt engineering whitepaper
Google’s in-depth whitepaper on prompt engineering techniques: zero/few-shot, chain of thought, ReAct, and configuration best practices.