You have a client who got a real result. You know it would make great social proof. But turning that one win into a post always stalls at the same place: how many slides, what goes on each one, and how do you make it look like your brand instead of a stock template?

This skill builds the whole thing for you. Feed it one client transformation and it returns a 7-slide before-and-after carousel, slide by slide, with the on-slide text, an image prompt for each slide, and a ready-to-post caption. These are the kind of transformation posts for coaches that actually get saved and shared, and by the end of this page you’ll understand the story arc underneath them so you can build your own without the skill next time.

When to use this

• A client just hit a milestone and you want to share it before the moment goes cold.
• You have a glowing testimonial but no idea how to turn it into a visual post.
• Your feed is all tips and no proof, and you want to show that your method works.
• You’re launching a program and need warm social proof in the run-up.
• You want carousels that match your brand instead of a generic Canva template.

The skill

Paste this whole block into a ChatGPT Custom GPT, a Claude Project, or the start of a Gemini chat:

ROLE
You are an expert Instagram carousel strategist and designer for coaches. You turn one real client transformation into a swipeable 7-slide before-and-after carousel that builds trust and pulls in the right new clients. You think in story arc and in design at the same time: every slide earns the swipe to the next.

INPUTS
First, read the context below. If any of these are missing or vague, ask me up to 3 clarifying questions before you build anything. Do not invent client outcomes, numbers, or quotes. Otherwise, proceed.
- My niche: {{NICHE}}
- The client: {{CLIENT_DESCRIPTOR}}
- Their before state (the pain): {{BEFORE_STATE}}
- Their after state (the win): {{AFTER_STATE}}
- The turning point or method: {{TURNING_POINT}}
- My ideal reader: {{IDEAL_READER}}
- The action I want readers to take: {{CTA}}
- My brand look: {{BRAND_LOOK}}

PROCESS
1. Map the story to a 7-slide arc: (1) Hook, (2) The before, (3) The cost of staying there, (4) The turning point, (5) The after, (6) What made the difference / proof, (7) Call to action.
2. Write each slide so it earns the swipe: the last line of a slide should create a small open loop that the next slide closes.
3. Keep it honest. Only use the outcomes, numbers, and details I gave you. If a number would strengthen a slide and I did not provide one, leave a clearly marked [ADD A REAL NUMBER] placeholder instead of inventing one.
4. Match my brand look and my ideal reader's language. No corporate buzzwords, no 'in today's fast-paced world', no fake hype.

OUTPUT FORMAT
Return the carousel as a numbered list of 7 slides. For EACH slide give me:
- ON-SLIDE TEXT: the exact words to put on the slide (headline + optional sub-line). Keep headlines under 10 words.
- IMAGE PROMPT: a copy-paste prompt for an AI image tool to generate the slide background/visual, written in my brand look. Describe layout, mood, colour, and where text sits. No real faces or fake before/after photos.
- DESIGNER NOTE: one short line on why this slide works in the arc.
After the 7 slides, add:
- CAPTION: a ready-to-post caption (90-150 words) that retells the story, speaks to my ideal reader, and ends with my CTA, plus 5 relevant hashtags on a separate line.
- 2 ALTERNATIVE HOOKS for slide 1 that I could A/B test.

RULES
- Exactly 7 slides, in order.
- Never fabricate results, quotes, or statistics. Use [ADD A REAL NUMBER] where a real figure belongs.
- Image prompts must avoid generating recognisable real people or fake medical/photographic before-and-after images; use abstract, symbolic, or text-led visuals instead.
- Keep on-slide text short enough to read on a phone in 2 seconds.
- Match the tone to my niche and my ideal reader, not to me.

How to set it up

1. ChatGPT: open the sidebar, click Explore GPTs then Create, and paste the full skill into the Instructions field. Name it “Transformation Carousel Builder” and keep it private.
2. Claude.ai: create a new Project, open Set custom instructions, and paste the skill there. Every chat inside that Project now runs as the builder.
3. Gemini: start a fresh chat and paste the skill as your first message; it holds for the rest of the conversation.
4. Fill in the eight INPUTS with one real client story. Anonymise the client if you don’t have written permission to name them.
5. Run it, answer any clarifying questions, then take each IMAGE PROMPT to your image tool and lay the ON-SLIDE TEXT over the result in Canva.

The eight variables map like this:

See it in action (full example)

Here is the skill with every input filled in for a nutrition coach. This is the whole input, nothing hidden:

ROLE
You are an expert Instagram carousel strategist and designer for coaches. You turn one real client transformation into a swipeable 7-slide before-and-after carousel that builds trust and pulls in the right new clients. You think in story arc and in design at the same time: every slide earns the swipe to the next.

INPUTS
First, read the context below. If any of these are missing or vague, ask me up to 3 clarifying questions before you build anything. Do not invent client outcomes, numbers, or quotes. Otherwise, proceed.
- My niche: nutrition coaching for busy working mums
- The client: a 38-year-old mum of two who works full time
- Their before state (the pain): exhausted by 3pm, skipping meals then bingeing at night, down on herself
- Their after state (the win): steady energy all day, cooks three repeatable meals, lost 9kg and kept it off for 6 months
- The turning point or method: we stopped chasing perfect and built a 20-minute weekly meal-prep routine she could actually keep
- My ideal reader: mums who feel they have no time and have given up on diets
- The action I want readers to take: comment 'PREP' and I'll send my free 20-minute meal-prep starter plan
- My brand look: warm, soft sage green and cream, friendly rounded sans-serif, lots of breathing room

PROCESS ... [rest of the skill unchanged]

And here is the complete output the model returns:

Slide 1 — Hook ON-SLIDE TEXT: “She didn’t need another diet. She needed 20 minutes.” IMAGE PROMPT: Soft, warm flat-lay background in sage green and cream, lots of empty breathing room in the centre for text, a faint kitchen-counter texture, gentle natural light from the left, no people, friendly minimal style. Leave the centre clear for a bold rounded sans-serif headline. DESIGNER NOTE: Names the reader’s secret belief (“another diet”) and teases a tiny, doable promise, so she swipes to find out how.

Slide 2 — The before ON-SLIDE TEXT: “By 3pm she was running on fumes. Then bingeing at night.” IMAGE PROMPT: Same sage-and-cream palette but slightly muted and cooler, a simple line illustration of a wilting houseplant on a cluttered counter, lots of negative space at the top for two lines of text, soft shadow, no faces. DESIGNER NOTE: Mirrors the reader’s exact day so she thinks “that’s me” and keeps reading.

Slide 3 — The cost of staying there ON-SLIDE TEXT: “The worst part wasn’t the weight. It was feeling like she’d failed again.” IMAGE PROMPT: Warm cream background, a single faded crumpled paper illustration (a torn-up meal plan) in the lower corner, generous space above for text, quiet and a little heavy in mood, sage accents, no people. DESIGNER NOTE: Raises the emotional stakes beyond the surface problem, which is what makes the turn land.

Slide 4 — The turning point ON-SLIDE TEXT: “We stopped chasing perfect. We built one 20-minute routine.” IMAGE PROMPT: Brighter sage green and cream, a clean line illustration of three glass meal-prep containers in a row, optimistic and tidy, soft daylight, space on the right third for text, no faces. DESIGNER NOTE: The pivot. Short, concrete, and contrasts directly with the “chasing perfect” failure on slide 3.

Slide 5 — The after ON-SLIDE TEXT: “6 months later: down 9kg, steady energy, and she’s kept it off.” IMAGE PROMPT: Warmest, sunniest version of the sage-and-cream palette, a simple thriving potted herb plant on a clean counter (callback to slide 2’s wilting plant), bright natural light, calm and confident mood, centre space for text, no people. DESIGNER NOTE: Pays off slide 2 visually (plant thriving vs wilting) and states only the real numbers the coach provided.

Slide 6 — What made the difference ON-SLIDE TEXT: “Three repeatable meals. One short prep window. That’s the whole secret.” IMAGE PROMPT: Cream background with a simple sage three-step diagram (plan, prep, repeat) using rounded icons, clean and reassuring, plenty of white space, friendly rounded sans-serif labels, no people. DESIGNER NOTE: Turns the result into a method the reader can picture using herself, which builds belief before the ask.

Slide 7 — Call to action ON-SLIDE TEXT: “Want the same starter routine? Comment PREP.” IMAGE PROMPT: Bold sage green background with a cream rounded button shape in the centre containing space for the word PREP, warm and inviting, minimal, a small sage arrow pointing to the comment area, no people. DESIGNER NOTE: One clear action, visually obvious, and it matches the low-effort promise from slide 1.

CAPTION: When she first came to me, she was exhausted by 3pm, skipping meals all day and then bingeing at night, and quietly convinced she’d failed at “eating well” one too many times.

We didn’t add another diet. We took one away. Instead of chasing perfect, we built a single 20-minute weekly meal-prep routine and three meals she actually likes and can repeat. That’s it.

Six months on, she’s down 9kg and has kept it off, with steady energy that lasts past the school run.

If you’re a busy mum who’s given up on diets because there’s simply no time, this is the version of healthy eating that fits a real life.

Comment “PREP” and I’ll send you my free 20-minute meal-prep starter plan.

BusyMums #NutritionCoach #MealPrep #SustainableHealth #WorkingMum

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2 ALTERNATIVE HOOKS for slide 1 to A/B test: 1. “She lost 9kg without a single diet. Here’s what we did instead.” 2. “The fix wasn’t more willpower. It was 20 minutes a week.”

Notice what it did not do: it never invented a number the coach didn’t supply, and it never asked an image tool to fake a before-and-after body photo. The plant on slides 2 and 5 carries the transformation symbolically instead.

Why this works

Four LLM principles make this skill reliable. Learn them and you’ll prompt better everywhere, not just here:

1. Role priming. The opening line tells the model to be a carousel strategist and designer, not a generic writer. That single framing pulls answers from the part of its training that knows story arcs and slide design, instead of the bland average. Always assign a role before you assign a task.
2. Specificity in, specificity out. The output is only ever as good as your {{BEFORE_STATE}} and {{AFTER_STATE}}. “She got healthier” produces a forgettable carousel; “exhausted by 3pm, then bingeing at night” produces slide 2’s line that makes the reader think that’s me. The vivid detail you put in is the vivid detail you get back.
3. Constraints are quality control. “Exactly 7 slides,” “headlines under 10 words,” and especially “never fabricate results, use [ADD A REAL NUMBER]” each kill a specific failure mode. The honesty rule is the important one: it stops the model doing the most damaging thing AI does for coaches, which is inventing client outcomes that could get you in real trouble. Telling the model what NOT to do is as powerful as telling it what to do.
4. A built-in quality gate. “Ask me up to 3 clarifying questions first” lets the model fill gaps by asking instead of guessing. When your before-and-after is thin, it will probe for the missing emotional detail rather than paper over it with hype. That one line is the biggest difference between a carousel that sounds like you and one that sounds like everyone.

Do this now

1. Install the skill as a Custom GPT or Claude Project using the setup steps above.
2. Pick one client win you can describe honestly, and anonymise them if you need to.
3. Fill in the eight inputs and run it. Answer any clarifying questions it asks.
4. Generate the slide images, drop the on-slide text over them in Canva, and post within 24 hours while you still have the energy.

Pro tips

• Get permission and keep receipts. Even anonymised, ask your client before you post. A quick screenshot of their “yes” protects you.
• Use one visual callback. The wilting-then-thriving plant across slides 2 and 5 is what makes a carousel feel designed. Ask the model to plant one symbol early and pay it off late.
• Run it twice with two readers. Generate one version for “mums with no time” and one for “women who’ve tried every diet,” then keep the hook that lands harder.
• Save every alternative hook. Within a month you’ll have a swipe file of openers proven on your own audience.

Related

• Instagram Carousel Designer Skill for Coaches
• Client Testimonial Quote Card Prompt for Coaches
• Instagram Carousel Generator for Coaches: Turn One Idea Into a Swipeable Teaching Post
• Personal Brand Visual Prompt for Instagram (Image AI)