Plan a deep research task before you run it

Writes a research brief with sub-questions, source types and a report format, ready to paste into a deep research tool.

Prompt, 3 blanks to fill
Help me write a brief for a deep research tool (such as ChatGPT deep research, Gemini Deep Research, Claude research or Perplexity).

Topic: {{TOPIC}}
The decision this research will inform: {{DECISION}}
What I already know: {{KNOWN}}

Write the brief with:
1. Main research question, in one sentence.
2. 4 to 7 sub-questions that together answer it.
3. Sources to prioritise and sources to avoid or treat with caution.
4. Time frame (how recent sources must be) and regions, if relevant.
5. What to do when sources disagree.
6. Report format: sections, tables, length, and a requirement to cite every factual claim.
7. Things the research should not spend time on.

Output only the brief, ready to paste.

Example output

Main question: which EU countries offer the fastest company registration for non-residents? Sub-questions: 1) online registration options 2) residency rules 3) real timelines in 2026 Sources: government portals first, then law firm guides. Output: comparison table plus 1-page recommendation.

How to use

Paste the brief into your deep research tool and let it run. Spot-check 3 to 5 citations in the report before trusting the conclusions.

Why it works

Deep research agents can spend twenty minutes reading, so a vague request wastes a lot of effort. Sub-questions, source rules and a report format give the agent a plan to follow and you a report you can check.

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96 prompts in 8 categories. Copy one, fill in the blanks, paste it into any model.

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Promptlexity is a free library of 96 AI prompts and 8 downloadable AI skills across 8 categories, plus a glossary of 64 AI and prompting terms. Each prompt shows the exact text to paste, the variables to fill in, an example of what comes back, and why it works. Each glossary term has a plain-English definition, an example and a common mistake. 6 step-by-step guides cover the basics. No signup, works with ChatGPT, Claude, Gemini and other models.

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