How to Build a Full-Stack Web App with AI (Full Tutorial with TRAE SOLO)

0:00What if you could take an idea and turn

0:02it into a fully working web application

0:04in minutes? Not just a design, but a

0:06real product with a front end, a back

0:09end, authentication, and even

0:11deployment. In this video, we're going

0:13to build a full application from start

0:15to finish using the Trey Solo agent.

0:17We'll start with a simple design

0:19inspiration and turn it into a complete

0:21SAS style application step-by-step.

0:24You'll see how it plans the entire

0:25project, generates the code, solves real

0:28issues, and builds production-ready

0:30features like user authentication. But

0:31here's the difference. You're not just

0:33watching AI generate code, you're

0:35actually working alongside it like a

0:37real development partner. So, if you

0:39want to build faster, smarter, and with

0:41far less friction, let's dive in.

0:51>> [bell]

0:54>> All right, guys. To get started, all you

0:56need to do is click the first link in

0:57the description below this video. That

1:00link will take you directly to Trey's

1:02official website. Now, Trey has recently

1:04updated their Solo AI, and I have to

1:07say, the moment you start using the new

1:08Solo and give it your first task, you'll

1:11immediately realize that this is one of

1:12the most advanced AI models in the web

1:15development space right now. At the

1:17moment, the new Solo is in beta, and the

1:19best part is that you can use it

1:21completely free during this period. So,

1:24let's go ahead and explore it together.

1:26Now, to get early access, you'll need to

1:28enter an invite code. To get your invite

1:30code, you'll just need to follow a few

1:32simple steps. For that, head over to

1:34Trey's official Twitter account. I've

1:35included the link in the description

1:36below this video. From there, you can

1:38access the invite code. Just copy the

1:41code, paste it into the field here, and

1:43claim your access.

1:46Next, the platform will ask whether you

1:48want to continue using Solo on the web

1:51or download the desktop version.

1:53If you're using a Mac device, you can go

1:55ahead and download the desktop version

1:57of the new Solo for a more native

1:59experience. However, at the time I'm

2:01recording this video, the desktop

2:02version is not yet available for

2:03Windows. By the time you're watching

2:05this, they may have already released it.

2:08So, feel free to check and download it

2:10if it's available. For now, I'm going to

2:11continue with the web version. And don't

2:14worry, the interface and overall

2:16workflow are essentially the same, so

2:18you'll be able to follow along even if

2:20you're using the desktop app. Now, once

2:22you enter the platform, you'll notice

2:24that by default, it opens in something

2:26called MTC mode. This mode is designed

2:29to help you structure your work. For

2:31example, handling research, analyzing

2:33data, creating content, or reading web

2:35resources, all in a more organized and

2:38modular way. Think of MTC as your

2:40control center, where you break down

2:42your work into tasks and let the AI

2:44assist you step-by-step. Before we jump

2:47into the Solo code mode, let me quickly

2:49show you one of Trey's most powerful

2:51features, skills. Now, in most AI tools,

2:53you have to repeat the same instructions

2:55for every project, your structure,

2:57naming, and workflow. But with skills,

3:00you can save all of that as reusable

3:02building blocks. As you can see here,

3:03Trey offers a marketplace of skills,

3:05from front-end design to back-end

3:07workflows and automation. You can

3:09install them, combine them, and reuse

3:11them anytime. So, instead of repeating

3:14yourself, you just apply a skill, and

3:15the AI already knows exactly how you

3:17want things done. This makes your

3:19workflow faster, more consistent, and

3:22much more efficient. All right, now

3:24let's move on to the Solo code mode and

3:25use it to build a complete full-stack

3:27website from scratch. Now, to switch

3:30from MTC mode to Solo mode, head over to

3:32the top left corner and click on this

3:34toggle, and there we go. So, what

3:36exactly is the Solo code mode? Think of

3:39it as your personal AI developer.

3:41Instead of just organizing tasks like

3:43MTC, Solo is designed to actually

3:45execute them. It can write code,

3:47understand your project structure, debug

3:49issues, and even help you build complete

3:51applications from start to finish. As

3:54you can see on the screen, it's focused

3:55on development workflows, things like

3:57application development, project

3:59understanding, automation tools, and

4:01even creative coding tasks. The idea is

4:04simple. You give it a goal, and Solo

4:06code figures out how to get there. And

4:08that's exactly what we're going to test

4:10in this video. Now, the first step is to

4:12create a new project. Go ahead and

4:14choose one of these two options, give

4:16your project a name, and then click on

4:18the create button.

4:19And just like that, we're ready to run

4:21our first task. In this tutorial, we're

4:23going to build a modern SAS style

4:25full-stack web application. Not just a

4:28simple landing page, but a real

4:30functional app with both front-end and

4:32back-end features. Now, when building

4:35applications with AI, one of the biggest

4:37challenges is coming up with a strong

4:38design idea or inspiration. For that,

4:41you can explore platforms like UI8 or

4:43Dribbble, where you'll find thousands of

4:45modern UI concepts. For example, I found

4:47this design right here. It has a

4:49cinematic, futuristic feel with a dark

4:51background, high-contrast visuals, and

4:54bold typography. Now, I'm going to use

4:56this design as the starting point for

4:58our project. So, first, I'll go ahead

5:00and upload the screenshot right here.

5:02Then, I'll enter my prompt and ask Solo

5:04to recreate the design. I'll say,

5:06"Recreate this exact landing page design

5:09with the same layout, spacing,

5:11typography, and element positions.

5:13Replace the brand name with my own, and

5:16update some of the text elements." And

5:18finally, I'll refine it by saying,

5:19"Remove the background image completely

5:21and use a pure black as the background.

5:24Keep all the elements, styles,

5:25gradients, and details exactly the

5:27same." And that's it. Now, I'll hit the

5:30send button, and let's see how the Solo

5:32code performs. Now, it gets to work. And

5:34as you can see, the first file it starts

5:36generating is the PRD.md file, which

5:39stands for project requirements

5:40document. This is actually a very

5:42important step. The PRD is where the AI

5:45breaks down your request and turns it

5:46into a clear, structured plan. It's not

5:48just writing code right away. It's first

5:50making sure it fully understands what

5:52we're trying to build. If we take a

5:54quick look here, you can see how

5:55detailed this is. It defines the product

5:58overview, the core features, the layout

6:01structure, and even the design style,

6:03including typography, colors, and UI

6:06elements.

6:07So, basically, the Solo agent is

6:09thinking like a real developer or

6:11product manager, planning everything

6:13before starting the actual development.

6:15And this is powerful because it ensures

6:18that the final result is accurate,

6:20consistent, and aligned with our

6:21original vision. All right, now let's

6:23give our agent a moment to complete the

6:25task.

6:28And there we go. It's done generating.

6:30And right here, we can see all the

6:32outputs created by the Solo agent. At

6:34the top, we have a live preview link,

6:36which opens our app directly on a local

6:38server, so we can instantly see the

6:39result in the browser. Below that, we

6:42have the PRD file, which outlines the

6:44full project requirements and shows how

6:46the AI understood our request. We also

6:48have an architecture file, where the

6:49agent defines the overall structure of

6:51the application, including how different

6:54parts of the system are organized and

6:56connected. And finally, we can see the

6:58list of files that were created or

6:59updated along with the exact changes

7:01made. So, this gives us full

7:03transparency into what the AI is doing

7:05behind the scenes. As you can see, it

7:07automatically opens the app in its

7:08built-in browser, and it has recreated

7:10the design almost exactly as we

7:12requested. However, there's one issue.

7:15This large headline text is not

7:17responsive across different screen

7:18sizes. So, to fix that, I'll give the

7:21Solo agent another task. I'll simply

7:23say, "Make sure the design is responsive

7:25on tablet devices and all screen sizes."

7:29Then I hit the send button,

7:31and within seconds, the agent updates

7:33the layout for us.

7:35Now, as you can see, the large text is

7:37fully responsive, but we still have

7:39another small issue. There are multiple

7:41small text elements in the hero section,

7:43and some of them, like this one here,

7:45are overlapping with the main headline.

7:47To fix this, Trey provides a very useful

7:50tool called the selector. By enabling

7:51it, we can directly target any specific

7:54element on the screen and apply precise

7:56changes exactly where we need them.

8:00And just like that, the layout looks

8:02much cleaner and more polished. Now, to

8:04take this design to the next level, I'm

8:06going to add a video background. For

8:08that, I'll use AI to animate an image

8:10based on the same design style we found

8:12on Dribbble. And to create that

8:14animation, I'll be using V.IO. Now, go

8:17ahead and open the second link in the

8:18description below and create your Veed

8:20account. Once you're logged into your

8:22dashboard, select the AI Playground

8:24option.

8:25At the bottom, click on AI models to

8:27choose your model.

8:29I'll go with the Google VO3.1 model,

8:31which is currently one of the most

8:33advanced options available.

8:35Next, upload the image that you want to

8:37animate.

8:39As soon as you upload it, the AI will

8:41automatically generate an animation

8:43prompt for you. You can either use that

8:45prompt or customize it with your own

8:48idea.

8:49Then, simply click on the generate

8:51button. After a few seconds, your video

8:53will be fully animated and ready to use.

8:57Perfect. Let's download it and add it to

8:59our project.

9:01Now, to upload the video into our

9:03project folder, head over to the left

9:05panel. Here, you can see your project

9:07files along with the active chat. Open

9:09the file management section, where all

9:11your files and folders are listed. Next,

9:14select the public folder. Click on the

9:17three-dot menu and upload your video

9:19file from your computer.

9:21If the file doesn't land in the correct

9:22folder, no problem. Just drag and drop

9:25it directly into the public folder.

9:27And there we go. Now that the video is

9:29inside our project, let's use it as the

9:31background for our hero section. To do

9:33that, right-click on the video file and

9:35add it to the chat. Also, make sure to

9:36copy its file path.

9:39Then, ask the Solo agent to use this

9:41video as a full-screen hero background

9:43with autoplay, loop, muted, no controls,

9:46object-fit cover, fixed positioning, and

9:49full responsiveness across all screen

9:50sizes. Paste the file path at the end of

9:53the prompt, hit send.

9:56And after just a few seconds, there we

9:58go.

9:59As you can see, the Solo agent has

10:01successfully applied the video as a full

10:03screen background to our hero section.

10:06It looks great, but it's a little too

10:08bright. So, let's quickly adjust the

10:10opacity to around 70%.

10:14Perfect. That looks much better. Now,

10:16it's time to give our Solo agent a more

10:18advanced task. Let's ask it to build the

10:20rest of the pages for our website. I'll

10:22go ahead and enter a prompt like this.

10:24Use the attached image as a strict

10:26design reference and extend my website

10:29by creating the remaining sections.

10:31Follow the exact same visual style,

10:33layout logic, and typography system.

10:35Build a complete landing page structure

10:37with all the necessary sections.

10:39I also have another screenshot with

10:41additional sections from a design I

10:43found on Dribbble, so I'll upload that

10:45as well and hit send. Now, here's

10:47something important. You don't have to

10:49wait for the Solo agent to finish one

10:50task before starting another. You can

10:52actually run multiple tasks directly

10:55within Solo at the same time. And on top

10:57of that, while Solo is working, you can

10:59even switch to MTC mode and start a

11:01completely separate task in parallel.

11:03So, you're not limited to a single

11:04workflow.

11:05Uh you can multitask seamlessly across

11:07both Solo and MTC without any

11:09interruptions. For example, I'll ask, "I

11:12want to integrate my Superbase project

11:14and progressively build the back end.

11:15How can I do that?" As soon as I hit

11:17send, it instantly responds with a

11:19step-by-step guide. So, yes, you can

11:22multitask between Solo and MTC and the

11:24AI will handle everything smoothly

11:26without delays.

11:28Now,

11:29the Solo agent has finished generating

11:30the rest of the design and it even

11:32provides a localhost link for preview.

11:35Let's take a look.

11:37As you can see, we now have a beautiful

11:39scrolling experience.

11:42What's really impressive is that the AI

11:44even generated a unique face image, even

11:46though the reference screenshot was

11:48completely different. It adapted the

11:50design intelligently to achieve a better

11:53overall result.

11:55The rest of the layout looks very

11:57advanced and polished. There's just a

11:58small alignment issue with this text

12:00here, but that's easy to fix. And

12:02interestingly, it also added animations

12:05to some elements, even though we didn't

12:07explicitly ask for them. That's actually

12:09pretty impressive. Let's also check how

12:11it looks on a desktop screen.

12:15And as you can see, it looks even better

12:17on larger screens.

12:19So now, let's say our front end is

12:20complete and it's time to move on to

12:22building the back end for our

12:23application. Now, if you're a beginner

12:25and not familiar with Superbase or back

12:27end development, don't worry at all. The

12:29Solo agent makes this process incredibly

12:31simple. All you need to do is type

12:33something like, "Next, I need to

12:35integrate Superbase to enable user

12:37authentication in my app." Then hit the

12:39send button and let's see the response.

12:43All right, as you can see, the agent

12:45says, "I've integrated Superbase

12:47authentication into your application.

12:49Here's a summary of what was done." And

12:51this is where things get really

12:52powerful. It automatically installs all

12:55the required dependencies, sets up the

12:57Superbase client, and even updates the

12:59front end. For example, it adds a login

13:01option directly into our interface. On

13:03top of that, it creates a .env.example

13:06file with all the necessary

13:07configuration fields. And right below

13:10that, it clearly explains the next steps

13:12we need to follow. It says, "To connect

13:15authentication to your Superbase

13:16project, create a new file called

13:18.env.local in the root directory and add

13:21your credentials." Perfect. Let's do

13:24that. Now, in the web version of Solo,

13:26there isn't a direct option to create a

13:27new file. So, instead, we can simply use

13:30the .env.example file. Just right click

13:32on it, rename it to .env.local,

13:35and that's it. Now, the final step is to

13:37create your Superbase project. Copy your

13:39Superbase URL and Superbase anon key and

13:43paste them into your .env.local file. If

13:46you've never used Superbase before,

13:47don't worry. It's actually very simple

13:49and I'll walk you through everything

13:50step-by-step. First, head over to

13:52Superbase and create your account. Once

13:54you log in for the first time, Superbase

13:56will ask you to create your first

13:58organization. Just give it a name,

14:01choose the type, select a plan, and

14:03click create. Now, inside that

14:05organization, you can create your

14:06project. Go ahead and enter a project

14:08name, set a database password, choose

14:11your preferred region, and then click on

14:13create new project. All right, once

14:15that's done, everything is ready for us

14:17to connect Superbase to our app. To do

14:19that, click on the connect button at the

14:20top.

14:22In the panel that opens, look for the

14:23connect your app section. Here, you'll

14:26see the exact values we need for our

14:27.env.local

14:29file. First, copy the project URL.

14:32Then, go back to the Solo agent and ask

14:34it to update your .env.local file. You

14:37can say something like, "Here is my

14:39Superbase URL." and paste the value.

14:46Next, go back to Superbase and copy your

14:49anon public key.

14:52Return to Solo again, paste the key.

14:55That's it. Now, just hit the send button

14:57and your application will be fully

14:59connected to Superbase.

15:01All right, now that we've connected our

15:03Superbase project, let's move on to the

15:05final step, enabling full user

15:07authentication in our app.

15:09I'll go ahead and tell the Solo agent,

15:11"Now that my Superbase project is fully

15:13connected, enable the user

15:15authentication features."

15:17Then I hit the send button and there we

15:19go. The agent completes the task and it

15:22also gives us an important tip. By

15:23default, Superbase enables email

15:25confirmation. This means that when a

15:27user signs up, they'll be asked to

15:29verify their email before logging in. If

15:31you prefer, you can disable this

15:33feature. To do that, go back to your

15:35Superbase dashboard.

15:37From the left panel, open the

15:38authentication section, then navigate to

15:41sign in and providers.

15:43Scroll down and you'll see an option

15:45called confirm your email.

15:47Simply disable it and save your changes.

15:50And that's it. Everything is now fully

15:51set up. Let's test it. I'll click on the

15:53login button.

15:54Since I don't have an account yet, I'll

15:56go ahead and create one by entering an

15:58email and a password.

16:01Now, I'll try logging in.

16:03And there we go. Everything works

16:05perfectly.

16:06To confirm, if we go back to Superbase

16:09and open the authentication section, we

16:10can see the details of the user account

16:12we just created, which means everything

16:14is fully connected between our app and

16:16Superbase. So guys, as you can see, the

16:18Solo agent can handle almost everything

16:20for you and make the entire process

16:22incredibly simple. Even when it comes to

16:25back end features, the AI takes care of

16:27everything behind the scenes. You don't

16:29need to worry about setting up

16:30databases, structuring your app, or

16:33connecting the front end with the back

16:34end. It handles all of that

16:36automatically, including user

16:37authentication, workflows, and data

16:40handling.

16:41All right, now let's say your website is

16:43complete and you want to deploy it using

16:45a platform like Netlify to make it live

16:47for everyone to see. The good news is,

16:49the Solo agent makes this process

16:51incredibly easy. All you need to do is

16:54say, "I want to deploy my app on

16:56Netlify."

16:57Within seconds, the agent prepares

16:59everything for you and walks you through

17:01the process step-by-step. For example,

17:03it automatically creates a netlify.toml

17:06configuration file.

17:08This file tells Netlify exactly how to

17:10build your project using commands like

17:12npm run build, and it also handles

17:15routing and redirects for you.

17:18Then it gives you a couple of deployment

17:19options. The easiest one is to simply

17:22upload your project. To do that, click

17:24on the three dots here and download your

17:26entire project as a zip file.

17:29Once that's done, head over to Netlify

17:30and create your account. After you land

17:32on the dashboard, go to the right side

17:35and create a new project.

17:37You'll see a panel where you can upload

17:38your files. Now, just extract your

17:41project zip file, open the folder, and

17:43drag and drop the dist folder, the one

17:45generated by the Solo agent, directly

17:47into that panel.

17:49And that's it. Netlify will

17:51automatically process those files and

17:53deploy your app. And as you can see,

17:55your website is now live and ready for

17:57the real world.

18:00That's it. We've officially built and

18:02deployed a full stack web application

18:04using the Solo agent. From designing the

18:06UI to generating the full front end, to

18:09setting up the back end, authentication,

18:11and even deploying the app, everything

18:14was handled with simple prompts. This

18:16really shows how powerful AI has become

18:19when it comes to building real world

18:20applications. Now, instead of spending

18:23hours on setup and configuration, you

18:25can focus on your ideas and bring them

18:27to life much faster.

18:29If you found this video helpful, make

18:31sure to like the video and subscribe to

18:32the channel for more content like this.

18:35And let me know in the comments, what

18:37would you build using this tool? Thanks

18:40for watching and I'll see you in the

18:41next one.