Which tool to choose
To learn the technique a normal conversation with any AI assistant is enough: you carry the chain forward one message at a time, in the same chat, so the AI remembers the previous steps. When a chain always repeats the same way (for example your weekly process for writing an article), you can automate it with workflow tools, but that's an advanced step. Start with the chain done by hand in the conversation: understand where the chain breaks before automating it. If you don't know where to begin, the single chat is just fine.
How to do it
- Break the task into logical steps. Ask yourself: what stages would a person go through? For an article: understand the topic, gather the points, make the outline, write, review. Each stage is a link.
- Run one link at a time and check the output. Don't launch the whole chain blindly: after each step, read and correct before moving to the next.
- Pass the result of one link to the next. The operational syntax for the second link of an editorial chain:
Below is the outline we just defined.
Develop only the first point into a paragraph of about eight lines,
staying faithful to the outline and without anticipating the other points.
[paste the outline]
- Have it produce structured outputs in the intermediate links. An outline as a list, data in a table: clean formats are easier to pass to the next step than discursive text.
- Keep a final verification link. The last step of the chain checks the work: "reread the complete text and verify that every point of the initial outline has been covered."
A concrete example
You have to prepare a presentation for a client. In a single prompt — "make me a presentation about X" — you get something generic and disorganized. With a chain: first link, "list the five questions this client will ask"; second link, "turn these questions into a slide outline"; third link, "write the content of the first slide based on the outline"; fourth link, repeat for the others; last link, "reread all the slides and flag where the argument doesn't flow." At each step you adjust your aim: if the questions from the first link miss the client, you fix them before the error propagates to everything else. The final result is coherent because each link was verified, not because the AI guessed everything in one go.
When it does NOT work (and how to fix it)
If the AI loses track of the previous steps
On long chains, the first links can fade from the conversation's memory. Fix: re-paste the key output (the outline, the data) into the prompt of the next link, instead of relying on "as we said before." What's in front of the model's eyes doesn't get forgotten.
If an error in one link ruins the whole chain
If the second link starts from a wrong first link, all the rest inherits the error. Fix: that's exactly why you check at every step. If you notice late, go back to the faulty link, correct it and relaunch only from there onward.
If breaking up the task seems like more work than doing it in one prompt
For small tasks the chain is overkill. Fix: use it only when the task has genuinely distinct stages or when a single prompt always gives you confused results. If a single request works, don't complicate it.
A tip from someone who actually uses it
The gain of the chain isn't the splitting itself: it's the checkpoint between one link and the next. There you catch the error when it's cheap to correct, before it drags on to the end. Whoever skips the checks and chains the links on the fly loses the main advantage and ends up with the same mess as the single prompt, just spread over more messages. Stop at each link, look, correct, continue.
Frequently asked questions
How many links should a chain have?
As many as the real logical steps of the task, usually three to five. Too many links on a simple job is wasted effort; too few on a complex job brings back the confusion of the single prompt. Let the natural stages of the task guide you, not a fixed number.
Do I have to automate the chain to take advantage of it?
No, on the contrary: better to do it by hand many times first. Automation is worth it only when the chain is stable and you repeat it often, and it removes the manual checkpoints, so it's suited only to chains you already know are reliable. For most uses, the chain done in the conversation is more than enough.
Does a prompt chain always give a better result than a single prompt?
Only on complex tasks, and only if you check the links. On a simple task, breaking it up adds steps without value. And a chain launched without intermediate checks is no more reliable than a single prompt: the advantage comes from the check at every step, not from the fact of having split. Splitting without checking is just slower.