<p><strong>Level:</strong> Intermediate · <strong>Topic:</strong> Prompts</p>
<p><strong>Prompts vs prompt contracts:</strong> a prompt is the message you send. A prompt contract is the same job written so you can tell, next Tuesday, whether the model kept the deal.</p>
<h2>A prompt is a request</h2>
<p>You type what you want. The model replies. If the reply is good, you move on. That is how most people work, and it is fine for one-off questions: “explain this paragraph,” “rewrite this more clearly,” “give me three subject lines.”</p>
<p>The request can be clever. It can even be long. It is still a request. You are hoping.</p>
<h2>A prompt contract is a checkable deal</h2>
<p>You still send a message. You also name four things the output can fail:</p>
<ul>
<li>Did it only use the inputs you allowed?</li>
<li>Did it return the shape you asked for?</li>
<li>Did it refuse the jobs it must not do?</li>
<li>Did it escalate instead of guessing?</li>
</ul>
<p>If any clause is missing, you do not argue with the prose. You fix the clause. That is the difference. A prompt is judged by whether you liked the paragraph. A contract is judged by whether the next person (or the next run) can use it without a meeting.</p>
<h2>When a prompt is enough</h2>
<p>One person, one screen, no one else will rerun it. Drafting a note you will edit yourself. Exploring an idea. You are the quality gate.</p>
<p>Do not add a contract because it sounds mature. Add it when failure is expensive or repeated.</p>
<h2>When you need a contract</h2>
<p>The same job will run again. Someone else will read the output. A system will parse it. A customer might see it. A number might go into a slide. That is when “be helpful” becomes a risk. The model will fill gaps. Filling gaps is what it is good at. Your job is to say which gaps are forbidden.</p>
<h2>A side-by-side</h2>
<p><strong>Prompt:</strong> “Write a status update for the project.”</p>
<p><strong>Contract:</strong> “Use only the bullet list below. Output: Done / Blocked / Need from you. Each line one sentence. If a date is not in the list, write unknown. Do not promise a ship date. If legal or HR is mentioned, stop and name the human owner.”</p>
<p>The second version is longer. It is also easier. You can paste last week’s list and see whether the shape held. That is the test: not prettier words — same shape, same refusals, twice.</p>
<h2>How to move from one to the other this week</h2>
<p>Take one prompt you already reuse. Add the missing clause. Run it on two real inputs. If the output shape breaks, the contract is not finished. Do that on your phone between meetings if you have to. Easy beats a workshop.</p>
<p>Instilligent Courses teaches judgement when AI does the first draft (The Durable Stack, live). We are not selling a live “prompt contracts” course on the storefront today. The idea is still the one to use at work.</p>
<p><a href="https://courses.instilligent.com/blog/what-is-a-prompt-contract/">Start here if you want the beginner version</a> · <a href="https://courses.instilligent.com/course-detail/the-durable-stack-whats-left-when-ai-does-the-work/43735/">Practise this week — The Durable Stack</a></p>


A prompt is a request. A prompt contract is the same job written so you can check it next Tuesday.

Prompts vs prompt contracts

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Prompts vs prompt contracts

Prompts vs prompt contracts

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What is a prompt contract?