Big Idea

The argument in one line.

A custom Claude Code skill file paired with the Gemini API reduces thumbnail production to a one-prompt workflow that costs less than a dollar per batch with no design experience required.

Who This Is For

Read if. Skip if.

READ IF YOU ARE…

You make YouTube videos and dread the thumbnail workflow because design feels out of reach.
You already use Claude Code and want to extend it into a creative production workflow.
You want to see what AI-generated thumbnail concepts look like in practice before committing to the workflow.
You are comfortable spending a few dollars on API credits for a faster iteration loop.

SKIP IF…

You already have a thumbnail workflow you are satisfied with.
You need pixel-perfect text legibility inside generated images. Gemini still garbles inline copy.
You are looking for a fully automated zero-touch solution. Headshot prep and prompt iteration are still manual.

TL;DR

The full version, fast.

A Claude Code skill file orchestrates the full thumbnail pipeline: it routes your headshot, sends a styled prompt to Gemini, and dumps output into a local folder. Eight to ten thumbnails run about 57 cents on a $10 Gemini API credit. The workflow solves ideation and composition; text legibility inside generated images still needs a manual layer. The video closes with a preview of a proprietary drag-and-drop editor the creator built on Claude Code that adds face-swap, background-scraping from competitor thumbnails, and targeted AI inpainting.

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Chapters

Where the time goes.

00:00 – 00:22

01 · Cold open / hook

Live demo of AI-generated thumbnails; self-deprecating admission about thumbnail skills; promise of the tutorial

00:22 – 01:17

02 · Setup overview

Folder structure for projects and assets, VS Code or AntiGravity as Claude Code host, pro plan requirement

01:17 – 02:13

03 · Skill file download

Automate Classroom community tab on Skool, download and extract the ZIP, paste skill file into project folder

02:13 – 02:50

04 · VS Code + Claude extension

Install Claude Code extension, open project folder, open Claude chat panel inside VS Code

02:50 – 03:59

05 · Prompt preferences + headshots

Set style prefs (dark/dramatic, before/after, pointing finger); prep headshots with transparent backgrounds; multiple angles recommended

03:59 – 04:34

06 · Gemini API key setup

AI Studio walkthrough, create API key, add $10 credit balance, paste key into .env file

04:34 – 06:38

07 · Live generation + review

Four thumbnail variants generated and reviewed in real time; honest critique of AI face accuracy and text garbling; iterates on v2

06:38 – 09:22

08 · Claude Thumbnail tool reveal

Demo of proprietary canvas editor: project dashboard, YouTube thumbnail scrape/face-swap feature, drag-and-drop canvas with AI inpainting panel

09:22 – 09:44

09 · Close / CTA

Cost callout (57 cents per 8-10 thumbs), build-something-you-use motivation, next-video plug, community link

Atomic Insights

Lines worth screenshotting.

Eight to ten AI thumbnails cost 57 cents when routed through Gemini API via a Claude Code skill file.
Claude orchestrates the thumbnail workflow but does not generate the images. Gemini does the actual rendering.
Gemini consistently garbles text inside generated thumbnails. Treat generated copy as a composition placeholder, not final copy.
Headshot preparation matters more than the prompt itself. Transparent background, varied angles, and multiple expressions are the real leverage.
A $10 Gemini API credit produces roughly 140-175 thumbnail concepts at the rate shown in the video.
The real value of AI thumbnail generation is a four-to-eight concept shortlist in under two minutes, not publication-ready finals.
Prompting style preferences before the headshot tag significantly narrows output variance on the first pass.
A custom .env file for API keys and a dedicated assets folder for headshots are the two structural decisions that make the skill file reusable across projects.
Building your own editor on top of Claude Code removes the re-prompting loop. Inpainting lets you change one element without regenerating the full composition.
Scraping a competitor thumbnail and swapping the face is a documented feature of the proprietary tool shown at the end of the video.

Takeaway

What 57 cents of AI actually buys you at the thumbnail stage

WHAT TO LEARN

AI generation solves ideation and composition cheaply; the remaining gaps of text legibility and face accuracy still need a human layer.

Claude Code acts as orchestrator in a thumbnail workflow: it handles the prompt loop, file routing, and API calls so you interact with a natural-language interface rather than raw API endpoints.
Gemini garbles text inside generated thumbnails consistently. Treat AI-generated copy as a placeholder and plan to overlay it manually or through a canvas editor.
Four to eight rough concepts in under two minutes is the real deliverable. Use AI output as a split-test shortlist, not a publication-ready final.
A $10 Gemini API credit generates roughly 140-175 thumbnail concepts at the 57-cent-per-batch rate shown, making the budget risk near-zero for experimentation.
Headshot preparation matters more than prompt sophistication. Transparent background, varied angles, and multiple expressions give the model enough raw material to produce usable compositions on the first pass.
Building a canvas editor on top of the generation pipeline eliminates the re-prompting loop. Inpainting lets you change one element like glow color or background without regenerating the entire composition.

Glossary

Terms worth knowing.

Claude Code skill file: A structured prompt and file routing configuration given to Claude Code that defines a repeatable workflow. In this context it handles folder setup, headshot references, Gemini API calls, and output naming.
Gemini API (AI Studio): Google image generation API accessed via aistudio.google.com. Used here as the rendering backend because Claude itself does not generate images directly.
AntiGravity: Google next-generation multi-agent development platform presented as an alternative to VS Code for hosting Claude Code.
AI inpainting: Editing a specific region of an existing image using a generative model while leaving the rest unchanged. Used in the proprietary editor to change only a glow color without regenerating the full thumbnail.
CTR (Click-Through Rate): The percentage of people who see a YouTube thumbnail and click on it. Higher CTR means the thumbnail is converting impressions into views.

Resources

Things they pointed at.

03:59toolGoogle AI Studio ↗

01:34linkAutomate Classroom (Skool) ↗

01:05toolVS Code ↗

01:05toolAntiGravity

06:38productClaude Thumbnail

Quotables

Lines you could clip.

00:15

“None of them matter if nobody clicks on your video.”

Tight reframe that reorders the creator priority stack→ TikTok hook↗ Tweet quote

09:14

“This only cost me about 57 cents and I was able to generate eight to 10 thumbnails, give or take.”

Specific number, surprisingly low. The money shot of the whole video.→ IG reel cold open↗ Tweet quote

09:22

“It is never too late to start. Just make sure that when you jump in, build something that you are interested in.”

Motivational close with a practical filter. Broadly shareable.→ newsletter pull-quote↗ Tweet quote

The Script

Word for word.

Read-along

Don't just watch it. Burn it in.

See every word as it's spoken — crank it to 2× and still catch all of it. The same dual-channel trick behind Amazon's Kindle + Audible.

00:00If you're like me, you are terrible at making thumbnails, which is unfortunate because 90% of your energy is used for ideation, script writing, being on camera, and editing.

00:09While, yes, all those things are important, none of them matter if nobody clicks on your video. So I asked Claude this question. How can I fix this?

00:16How can I double my click through rate? And this is what Claude gave me. Very clean, minimalistic.

00:22Who the heck is that? Now that one I like. That looks nothing like me.

00:27Okay. Clean me up a little bit. These really aren't bad for my first shot, but the second shot looks a little better.

00:33Today, I'm gonna show you how quick and easy it is to use Claude to make thumbnails for your channel. I'm gonna give you the skills file you need to create these exact style of thumbnails, and I'm gonna give you a sneak peek of the tool that I've been working on the last few weeks that's gonna make this whole process next level.

00:46The first thing that we're gonna need is a folder, someplace that you can store your projects, the skill file, the Claude MD file, any and thumbnails that we end up generating through this process. So go ahead and create a brand new folder. If you already have a folder dedicated to clod projects, you can use that one.

01:01Otherwise, create a brand new folder specifically for this clod project. Next, you're gonna need to either install Versus Code or Anti Gravity. That way, we have a way to access Claude Code.

01:11You can generally just go through the app, but what we're gonna be working on today is gonna need a little bit more utility, and it's a lot easier to navigate inside Versus Code or Anti Gravity. But whichever your preference, it really doesn't matter.

01:23In order to get access to Cloud Code, you will need a pro plan or better. So make sure that you have that set up already to go. Then you are gonna need a custom skill and Cloud MD file.

01:31I made both of these for you. Just click the first link in the description. Right here, you'll see automate classroom, and at the very top right here, and then you should see this resource at the bottom right here, Claude thumbnail skill.

01:42Just click on that, and click on download. Go to your downloads folder, extract the files, and then paste those files right in to the folder that you just created. In this case, I made mine Claude test, so I'm gonna right click and paste.

01:55And there it is. Inside currently, you should just see a Claude folder, an EMV example, and a Claude MD example inside. Next, we're gonna open up Versus Code.

02:03Alright. When you open up your Visual Studio, it's gonna look something similar to this. You might have a few windows popped up or a few pop ups, but you can close those.

02:10What you need to do is on the left here, click on extensions. You can see I already have it installed here, you're gonna type in Claude code and then there should be a small button like right here, it'll say install.

02:21Just go ahead and install Claude code for Visual Studio. Once you have that installed, let's go to the file explorer at the top here and then click on open folder. I saved mine to the desktop here and you can see Claude test thumbnail, so I'm gonna click on that folder.

02:35But whatever folder you name, that's the one that you're looking to open up here, so I'm gonna select that folder. I'm gonna go ahead and click on the EMV example here, then click on the Claude icon top right. We don't actually need this window open.

02:45This is gonna open up the actual Claude chat that we can prompt and have Claude set this all up for me.

02:52It is gonna ask for a few preferences, so I chose dark and dramatic. Let's go before and after. No text hooks, and pointing finger usually works well.

03:00If you plan on using your own face in a thumbnail, make sure that you get a good clear image, plenty of good lighting, and the expression that you're wanting to show in the video. But for the best results, I would take several photos of yourself with different expressions from different angles. Some from the side, some straightforward, some from the other side.

03:17A wide variety of images and headshots. That way you have a lot of assets that you can use for a long time. Once you have your headshots, make sure that you remove the background so it's just a transparent image of your headshot, and then just drag it right over inside of the assets folder right here.

03:31And you can see it just added a brand new headshot. So now I have two headshots. The last thing we need to do to get the ball rolling is get our API key.

03:38Claude does a great many things, but image generation is not its strongest suit. So instead, we're gonna use Gemini. But before I show you where to get your API key, make sure you hit that subscribe button and comment down below what thumbnail style you're most interested in.

03:51This will give me feedback so I can start building templates you can use more on that later on. Go to your web browser and go to aistudio.google.com. Sign in to your Google account if you haven't already.

04:00Then on the bottom left here, click on get API key. And at the very top right, create API key. Go ahead and click on that.

04:08Give it a name. I'll call this test create key. This is your API key here.

04:13You're gonna go ahead and click on copy. Then when you get back to Versus code, you're gonna paste that inside your EMV file. I'm not gonna show you mine because that's the real code, but essentially gonna delete this right here and paste in that API key that you just got.

04:26Don't forget to add a balance to your credit limit on Google. Otherwise, you will not get any generation. I just put in a one time credit of $10.

04:34You can see right here. And after a few generations, I'm at $9.43. So this will go a long way.

04:41Once everything checks out, it's as simple as putting in your preferred prompt. For this example, I use the prompt, I want to create four different thumbnails using Claude to make thumbnails. Please use my headshot at, and I just tagged march arms crossing.

04:53That's where all this came from. On the right, while the window on the left shows thumbnails being designed.

05:00And underneath the workspace here, this is where they all popped up. So take a look and see what they come up with. This one's actually kinda cool.

05:06I'm not a huge fan of the orange glow behind me, but this is a really clean thumbnail on the very first prompt. Let's take a look at the second one. Not a huge fan of my facial expression.

05:15It kinda doesn't look like me. A little a little scary. But, yeah, I'm not a I guess I'm not a fan of this one as much.

05:23The the whole design plus my face, so we're not gonna use that one. Claude, no designer needed. Took my hat off and comb my hair.

05:30That looks better than what I actually got in real life. You know, it looks pretty good. Before my video, after Scraeler for skiviliogues to design.

05:40I mean, besides for the whatever that text supposed to say, that actually looks really good. And then let's look at the fourth one. Claude four thumbnails in sixty seconds.

05:49Same image you me, nice and clean. AI mastermind, generate four times faster. The clawed advantage, instant results proven system.

05:56And I mean, that one's meh, but I guess the whole thing is just to show an example. So right here you can see the comparison of all of them. These look pretty good, but let's let's do some more.

06:04Alright. It's been about two minutes. Let's see what we got here.

06:07Alright. So we're gonna start on e. Okay.

06:10That one's actually pretty cool. It's like it's being designed inside of a Photoshop directly there.

06:15Yeah. That looks really nice. I actually like that one a lot.

06:18This is cheating with Claude up there. Yeah. Random random text again.

06:24I don't know what that says, but that one looks pretty clean aside from the image within the image. Okay.

06:30I don't know who that person is, but the actual concept inside looks really cool. I do like that. Um, just I don't know who's in that image.

06:40And again, I would do multiple prompts, multiple rounds because you're not gonna get an exact image that you're looking for one shot. Very rare. Let's look at the last one here.

06:49Hours of work, five minutes. It's not the cleanest, but you understand the concept the the best there. Give me a v two of I think this one was from c.

06:58Yeah. C, I like that one as well. I'm very likely gonna use these examples as a split test for this video.

07:05So, you know, comment down below which one you saw when it popped up in your feed because it might not be the exact same a few days, a few weeks, even a few months down the road. See, I wanted the ability to generate images and then edit them without having to re prompt everything every time. So I created this platform where you could upload your own avatars or your own headshots.

07:22Like, you can see right here, I have two of my own. You can upload them here. If you back go to the dashboard here, you can create a new project.

07:28Pick a name for the project. So I'm just gonna call this one demo, and then the niche will also be demo. This will help you find things later.

07:34But you can prompt in what you're looking to do right here. This will generate an image fresh using whatever API you have plugged in. You can also click here to YouTube, and you can actually grab and scrape another YouTuber's thumbnail by swapping their face and body, removing the title and text, and changing the background color or design.

07:52Uh, just adding the link there. You can also drop in your own image if you wanna go ahead and remove a background, or you could also upscale the image and increase the face enhancements or start from a blank canvas.

08:03So let's just go ahead and start right here. So on the left hand side, can create a text, a rectangle, a eclipse background, or an image.

08:09I'm gonna go ahead and just click on image and upload this one that we just made from the cloud demo. And on the right side here, you can see the AI panel. So this is where we can actually make changes by generative AI.

08:20Currently have Gemini plugged in, and I'm gonna go ahead and change the prompt to change the orange glow to a blue glow. And look at that. It just didn't change anything else.

08:29I was having issues before with it changing everything else in the image, but you can see here orange, it literally the only thing it changed here was the glow color. So I'll go ahead and duplicate this real quick and then let's go ahead and try something different here. I'm gonna go ahead and just remove the glow this time.

08:44That's not terrible. It's not the best. But on the left here, can add another layer.

08:48So let's go ahead and add a text layer. If we wanna go ahead and add my own headline, say times to click through rate.

08:56Change this to my preferred font here. And then for the fill, let's change this to a color we can actually see.

09:04I'm thinking probably black or a dark color here. This is essentially a demo of what, uh, I've created and, uh, what you can do with, uh, this tool. By the way, for those of you wondering, this only cost me about 57¢ and I was able to generate eight to 10 thumbnails, give or take.

09:17I lightly edited them on a software that I created with Cloud Code.

09:23Look, it's never too late to start. Just make sure that when you jump in, build something that you're interested in. Build something that you would actually use.

09:32A website is a good starting place. And if you check out this video right here, I walk you through how you can build beautiful websites in just minutes. Or if you're ready, click the link below and build some cool shit with me.

The Hook

The bait, then the rug-pull.

Nine minutes and 57 cents is what it takes to go from blank canvas to eight AI-generated thumbnail concepts with no Photoshop, no designer, no guessing. Cody McDowell built a Claude Code skill file that routes your headshot through Gemini and drops finished compositions into a folder while you watch.

Frameworks