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If you're still struggling to build apps in 2026, then I want to show you a system that I use to build and launch any app in 24 hours. And this is a system that I've developed over the course of the last six months that will allow you to build any application you can imagine with AI coding tools, and launch it all within 24 hours. And the reason that this works so well is because it takes you step by step through the entire process. And this is the exact process that I teach in my community over on school, where I've helped hundreds of other people build applications and launch them using AI coding tools. So in this video, we're going to break down what this system is, how to set it up so that you can start using it to build your applications, and how to use it to build any app in just 24 hours. And launch it so that you can start getting real customers. If you don't know me, my name is Chris and for the last 15 years, I've been designing apps and advising startups on product and design. And with that said, let's jump straight into the video and show you the system so that you can start building apps and launching them in just 24 hours.
So what is this system that I'm talking about? Well, this system is called BuilderOS, and this is something that I've been putting together over the course of the last 3 to 6 months based on my own build process for building applications and products using AI coding tools like Codex, Claude code, and Cursor. And what BuilderOS is, is basically a set of AI skills that guides you through the entire process of building your application and creating all of the context that you need to actually build and launch a real product to real paying customers. And the reason that this works is because this is built on my knowledge from working with startups for the last 15 years and advising startups for the last five years. Including Y Combinator backed startups and startups have gone on to win Apple design awards and exit for millions of dollars. And so this system is that kind of early stage startup process condensed down into a set of AI skills that you can use to not just build an app, but an app that actually works and has a really strong design style. And it's going to give you a really high chance of actually being able to get customers for it as well.
And so let's break down the actual skills that is included in BuilderOS, and if you are interested in using BuilderOS, I put a link down in the description below, and all you can just go to builder-os.dev and get hold of the skills that way. I'm going to show you exactly how to set it up in a second. And the skills here basically run across four different phases: ideate, plan and design, build, and then launch. And I'm going to break down exactly how these skills work when they're chained together, show you exactly how to go through using these skills, and I'm going to show you how to set up BuilderOS as well. But basically, we want to create our idea first, then we want to plan and design our app, and there's a reason that we do design before actually building it here as well. Then we're going to build our app, and there's a few skills in here to help you build new features and improve your app as you're building it as well. And then we are going to launch it to real paying customers, get it live and get it in the hands of real people. So how does BuilderOS actually work? So let's go through these stages in a little bit more detail, and I'll talk a little bit about the skills that are included in BuilderOS. I'm going to go through the full process here using BuilderOS so that you can use these skills to build your own applications. And if you're interested in learning a little bit more about how to use BuilderOS to actually build your own apps, you can also join my community where I have a full course on BuilderOS, how to get it set up and how to use it properly. And you can join my community on a free 7-day trial as well. And so do jump in there if you're looking to learn a little bit more about this. But basically, this breaks down to these steps. So the first step, which is the ideate step where we'll call it the same thing here, is about how do you find an idea and how do you validate your idea? And also, the way that BuilderOS is basically set up is that you can jump in at any point of this. If you already have an idea, you can jump straight into the plan stage. If you already have a PRD or a roadmap, you can jump straight into the design stage. If you already have your design.md over PRD and your roadmap, you can jump into the build stage, and if you already have something built, you can jump straight into the improve stage. So this is designed to work wherever you are on your build journey, but you might want to go back a few steps and use some of these skills in order to validate your idea and see if what you're building is actually going to work. So let's go through the ideate stage of BuilderOS here. Now, there are two skills inside of BuilderOS which help you to figure out the idea of your app that you want to build and to validate it against the market. And now I don't think the right advice is to spend ages and ages validating your idea before you actually launch, because this can just be a long period of procrastination before you actually do anything. And so I would actually advise just validating your idea using AI, getting it to do some research, and this skill is a great way to do that. And before that step, if you want to find an idea that's based on your own expertise and a problem that you know very, very well that you can solve using software, then use the idea generator. So the idea generator skill here is going to basically interview you to ask a series of questions: what do you know, what's your expertise, what problems do you come up against on a day to day basis and help you to figure out how you could solve those problems not just for yourself, but for other people using an AI application that you can build using BuilderOS. But not only that, it's going to help you identify your customer as well and outline an MVP for your idea. So we're basically trying to figure out like what is the most painful problem that we have that we can solve for ourselves that other people would also be interested in. So this is a really great way to find an idea that's actually worth building instead of building something that nobody is going to want to use. The next step then is validating your idea, which again, it validates quickly against market signals. So it takes your idea that you generated in the first step here and then it runs it through a basic like smoke test against a bunch of criteria, does a bunch of research on the web for you across Reddit, communities, blogs and a bunch of other places to kind of validate this idea to make sure that that painful problem does exist and to give you ways of pivoting it if it's not quite painful enough or you might have the wrong customer, and basically just give you a whole report on whether it's good or bad. Now once you have your idea, you want to move on to the plan phase. And this is using the product planner skill inside of BuilderOS. And what plan is going to help you do, it's going to help you create a couple of documents that you're going to need to actually give to your AI coding agent to build your full application, and that is a PRD which stands for product requirements document. This is something that people talk about a lot with AI coding and building AI software, and it's an outline of the technical architecture and everything included in the application that you're building. The product planner skill is going to go from your idea and your idea validation in the first step, and it's going to help you create a PRD off the back of that that matches that. We're going to be using it's going to find a proven tech stack, it's going to help you create a detailed plan, and it's going to create an AI-friendly PRD, not a human PRD as well. And then the most important thing here is the second document that it creates, which is the roadmap document. And this takes everything from the PRD and it creates a phased roadmap broken down into steps into tasks, with checkboxes on each task that you can give to an AI coding agent to build your entire application in one go, because it will be following that really, really clear spec, that clear roadmap with tasks for each thing that it's building in an AI-friendly format. There's a bunch of stuff inside of that roadmap that links to the PRD as well, and let me show you exactly what the PRD and the roadmap document look like in an existing project. So this is an existing project that I have open inside of Codex for an application that I'm building, and I've got on the right hand side here, I've got a few different documents and I basically got a product roadmap and a product requirements document here. Now these are the two key documents that we're going to be creating with BuilderOS in order to build your application. The PRD is going to have an overview of everything to do with your application including the objective, the product summary, the magic moment inside of the application as well, which is the key moment that people will decide whether they want to pay or basically when they realize what the app actually is going to do for them, how it solves their problem, success criteria, technical architecture and a bunch more stuff including the repository structure and everything you would expect from a PRD. And this is all done in an AI-friendly way, so it doesn't include a bunch of stuff that humans would use in a typical PRD, it just has everything that an AI coding agent would need. And then on the product roadmap side, you basically have a full product roadmap broken down into phases with a build philosophy at the top. We've got Phase 0 here and so you can see there's a bunch of tasks down here and you can't maybe can't quite see on here but there's a little checkbox against each of these tasks and these tasks reference files and notes from inside of the PRD as well. So these two documents are very much linked together, and when you give the roadmap to your coding agent to go through and build, it's going to be able to reference that PRD where each task is kind of asking it to reference specific files and it's going to build the application for you through all of these phases step by step. And I'm going to show you how the build skill works when we get to that in BuilderOS as well, because that is going to instruct the coding agent to build through the entire roadmap in one go and do all the code review and verification it needs along the way as well. So that is what your PRD and your product roadmap are going to look like in an existing project. Once you've done your PRD and your product roadmap, you're then going to want to create your design system. Now this is not an in-depth, super detailed design system, this is just your starting point for your design. So what we're going to do here is just create a rough design system, so we have a skill inside of BuilderOS called design system, we're going to create a rough design system here, we're then going to use that rough design system as a starting point and we're going to output a file called design.md, which if you don't know what design.md is, design.md is a design system documentation format that was created by Google and is kind of open source and the standard for design system documentation inside of codebases that is readable by AI agents. So this design.md file that we're going to create is basically going to give us the consistency of design across our entire app to kind of reach that kind of 70-80% quality level where we can then iterate on top of it when we start to build and when we start to improve our application after it's built. And the way that this works inside of BuilderOS is you basically give it an image reference or a set of image references, it analyzes those, asks you a bunch of questions and then generates that design.md document. And to give you an example of what a design.md looks like from an existing project that I have here, it basically gives you an overview of the entire design style for your app, so you get brand and style direction, color direction, typography, layout and spacing, elevation and depth, shapes, components and do's and don'ts as well. So this is the rough, kind of starting point for your design for your entire application and it's going to extract this from an image reference from somewhere like Dribble, basically go to somewhere like Dribble and then find an example of a UI that you like and then give the design system skill inside of BuilderOS that image so that it can generate your design.md file for you. Now once you've generated your design.md file and you've got your PRD and product and product roadmap from the plan phase, we're then going to want to build it. And BuilderOS allows you to build your entire application from your PRD and roadmap in one go without you having to do anything. And the way that this works is that it builds using a loop instead of building using a prompt, and I have a skill in here called build MVP, which basically runs a loop and all a loop is, where you ask your coding agent or your agent to do something, and then to do something else and then to keep doing that in a loop until it reaches a criteria that would be deemed as done. Now in this instance, the build loop for build MVP goes through a few steps. What it does is it says build every task from the product roadmap one at a time and tick them off as you go. Once you've built each task, do a code review and fix any issues that you find using the code review feature inside of the application that you're actually building with, so Cursor, Claude code or Codex. Once you've done a code review and fixed all the issues, then do a test using the browser to see if everything works related to this task that you're doing, then once it passes that test, move on to the next task in the roadmap and then build that and then keep going every single time until you've built all of the tasks in the entire roadmap. Now this does use a reasonable amount of tokens because you're essentially instructing it to go through this entire phased roadmap in one go, and it can take anywhere between 30 minutes to three to four hours to build your entire application depending on the complexity of your application, but the great thing with this build loop is that because it's ticking off every task in the roadmap as it goes, if you get interrupted at any point or if you hit your usage limit, you can basically pick back up exactly where you left off with your coding agent using the exact same skill to keep it going even if it has to stop because it will be able to read that roadmap and see where it got to on the checklist. And the reason that this works now as well is because models and harnesses, i.e., Cursor, Codex and Claude code, are now good enough to run in a loop, to verify their own work, to fix any issues using code review and to build a complete application with a few bits missing here and there that you're going to have to set up afterwards, but to basically build your complete application in one go. And so you can start to see how you can build and launch applications in just 24 hours basically by finding an idea, validating your idea, creating the documents that you need to then build it, building it in one go and allowing your coding agent to work for a few hours to build the foundation of your app, and then move on to the next step here which is how which is to improve your app, and we have a skill inside of BuilderOS called build loop, which basically instructs your coding agent to build the feature, do a code review, verify using a test in browser and then report back to you once it's built and once the feature works. And again, the reason that we're using a simple loop skill here is because building in a loop allows us to give the coding agent free rein to do the code review, to fix any issues for us, to test it in browser so that we don't have to do that and then to just report back once it's done. And so we can use this to build any feature or do any improvements inside of our app, and that skill is included inside of BuilderOS for each of the major coding tools, so Claude Code, Cursor and Codex. And then the last step in BuilderOS is to launch, where we basically get your app live so that real people can come on it and start paying for it and using it. And this uses a skill called launch checklist, and all the launch checklist does is it reviews your codebase, where you are at the moment with your app, and it gives you a step by step set of instructions to get your app live on a URL or in the App Store, so that you can just follow it step by step, ask questions at each step of the way, give your agent a bunch of tasks to do from that checklist, and then get your app live as quickly as possible. And this is going to guide you through everything that you need to do in terms of security review, setting up your environment variables based on what technology you're using, building your app and then submitting it to wherever you need to kind of submit it, setting up production environments for your date for your dat setting up the production environment for your database, all of those things are going to be covered in the launch checklist here, and that is how you get your app live so that people can actually start using it. And that is the way that I build any application and get it live in 24 hours using BuilderOS. And I've used this exact process myself to launch multiple products including scribe.dev which is my AI markdown writing tool and orchestrate, which is my AI development environment, as well as applications that I've built for clients that I've been working with as well. So this 100% works, it will allow you to build your app and get it out there. And so that is how you can build any application using AI coding tools with this simple builder operating system that you can install in any project. So hopefully that gives you a little bit of an idea of how I build and launch applications in 24 hours using this system that I've created called BuilderOS. And this is just based on the exact way that I work, it would massively encourage you to try out, go through the steps, follow the skills as it kind of guides you through those skills, build your application, build the application that you've had in your head that you've always wanted to create, and maybe even using some of these skills you're going to find a better app, a better product that you can build off the back of that as well and legitimately get it live in 24 hours. Hopefully, this has been helpful and if you do have any questions about BuilderOS, you can put them in the comments in the YouTube video down below or just go over to my community, go through the BuilderOS course and add any feedback or questions in there. If you enjoyed the video, then don't forget to like and subscribe. Thank you for watching and I'll see you next time.
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