{"slug": "building-the-first-version-of-sitegen-ai-turning-an-idea-into-reality", "title": "Building the First Version of SiteGen AI – Turning an Idea into Reality", "summary": "A developer built the first version of SiteGen AI, an application that generates websites from user prompts using FastAPI and the Gemini API. The initial prototype, though imperfect, proved the concept and led to lessons about the importance of prompt engineering and system design. The project has since evolved into a vision for an AI Software Engineer capable of generating complete applications.", "body_md": "In my previous article, I shared how the idea for **SiteGen AI** was born.\n\nIn this article, I want to talk about how I built the **first working version** of the project.\n\nSpoiler alert...\n\nIt wasn't perfect.\n\nBut it worked.\n\nAnd that's where every great project starts.\n\nThe first version had only one objective.\n\nA user types something like:\n\nBuild a modern portfolio website for an MCA student.\n\nThe application should automatically generate:\n\nand display the result instantly.\n\nSounds simple.\n\nIt wasn't.\n\nSince I'm comfortable with Python, I decided to use **FastAPI** for the backend.\n\nMy initial stack looked like this.\n\nI intentionally kept the first version simple.\n\nThe goal wasn't to build the perfect architecture.\n\nThe goal was to make something work.\n\nThe first workflow looked like this.\n\n```\nUser Prompt\n\n↓\n\nFastAPI Backend\n\n↓\n\nGemini API\n\n↓\n\nGenerated HTML\n\n↓\n\nBrowser Preview\n```\n\nThe user entered a prompt.\n\nThe backend sent it to the AI.\n\nThe AI generated the website.\n\nThe browser rendered it immediately.\n\nWhen I saw my application generate its first webpage, it felt amazing.\n\nOne of the first prompts I tested was:\n\nBuild a portfolio website for a software developer.\n\nWithin seconds, the application generated:\n\nHTML\n\nCSS\n\nJavaScript\n\nIt wasn't beautiful.\n\nIt wasn't production ready.\n\nBut it proved that the idea worked.\n\nAs I continued testing, I noticed several issues.\n\nSometimes the generated websites looked almost identical.\n\nSometimes the AI ignored parts of the prompt.\n\nSometimes the design was too generic.\n\nThe more prompts I tested...\n\nthe more problems I discovered.\n\nAt first I thought the AI was the problem.\n\nLater I realized the real problem was my architecture.\n\nOne of my biggest lessons was this:\n\n**Good AI output depends on good prompts and good system design.**\n\nSimply sending:\n\nBuild a business website\n\nisn't enough.\n\nThe AI needs context.\n\nIt needs structure.\n\nIt needs clear instructions.\n\nThat realization completely changed how I thought about AI development.\n\nThe first version of SiteGen AI was only the beginning.\n\nIt could generate simple websites.\n\nBut my vision became much bigger.\n\nI didn't want to build another HTML generator.\n\nI wanted to build an **AI Software Engineer**.\n\nA system capable of generating complete applications, not just webpages.\n\nThat vision became **SiteGen AI v2**.\n\nI'll talk more about that in the next article.\n\nLooking back, the first version wasn't impressive from a technical standpoint.\n\nBut it taught me one of the most important lessons in software engineering:\n\n**Start simple. Learn. Improve. Repeat.**\n\nEvery feature I add today is built on top of that first working prototype.\n\nIf you're building your own AI project, don't wait until it's perfect.\n\nBuild the first version.\n\nYou'll learn far more from a working prototype than from endless planning.\n\nThanks for reading!\n\nIf you're also building AI applications, I'd love to hear about your journey in the comments.\n\nHappy Coding!", "url": "https://wpnews.pro/news/building-the-first-version-of-sitegen-ai-turning-an-idea-into-reality", "canonical_source": "https://dev.to/bharath_kumar_30_vog/building-the-first-version-of-sitegen-ai-turning-an-idea-into-reality-2o21", "published_at": "2026-07-08 11:00:55+00:00", "updated_at": "2026-07-08 11:28:54.819659+00:00", "lang": "en", "topics": ["artificial-intelligence", "generative-ai", "developer-tools", "ai-products", "large-language-models"], "entities": ["SiteGen AI", "FastAPI", "Gemini API", "Python"], "alternates": {"html": "https://wpnews.pro/news/building-the-first-version-of-sitegen-ai-turning-an-idea-into-reality", "markdown": "https://wpnews.pro/news/building-the-first-version-of-sitegen-ai-turning-an-idea-into-reality.md", "text": "https://wpnews.pro/news/building-the-first-version-of-sitegen-ai-turning-an-idea-into-reality.txt", "jsonld": "https://wpnews.pro/news/building-the-first-version-of-sitegen-ai-turning-an-idea-into-reality.jsonld"}}