Building a Basic WebApp with Agentic IDEs in 2026
Explores how agentic IDEs like VSCode with GitHub Copilot Agent Mode let developers build full web applications from high-level prompts — with a hands-on demo creating a Next.js season survey site.
What are Agentic IDEs?
Agentic IDEs are integrated development environments equipped with fully autonomous AI collaborators. These intelligent agents can develop entire software applications from high-level instructions like “Build a web application using Next.js in the current directory.”
Rather than requiring step-by-step micro-prompts, these systems operate autonomously while requesting confirmation when needed. They handle multiple development tasks including codebase creation, testing, debugging, and build preparation. For existing projects, they can perform comprehensive refactoring, quality assurance, dependency management, and documentation updates.
Agentic IDEs in 2026
Developers now have multiple options for AI-integrated development environments:
Traditional IDEs with AI Agents:
- VSCode with GitHub Copilot Agent Mode
- Amazon Q Developer
- Tabnine
- JetBrains AI Assistant
AI-Native IDE Forks:
- Cursor
- Windsurf
- Zed
- Firebase Studio
VSCode’s GitHub Copilot now supports OpenAI’s GPT-5, Anthropic’s Claude (4.1 Opus & Sonnet), and other proprietary models — with multimodal capabilities allowing developers to switch between models mid-session.
What is Next.js?
Next.js is an open-source React framework for building full-stack web applications, developed by Vercel. It provides built-in structure, features, and performance optimisations for production use. Companies like Netflix, Hulu, Uber, and Spotify use it in production.
Demo: Building a Season Survey Website
The following walkthrough uses VSCode with GitHub Copilot Agent Mode.
Setup:
- Install VSCode and enable GitHub Copilot extensions
- Open the Copilot Chat window
- Enter a prompt requesting Next.js installation
- Answer configuration questions (TypeScript, ESLint, Tailwind CSS, etc.)
- Run the development server with
npm run dev
Project Enhancement:
After initial scaffolding, you can structure pages (Home, About, Contact, Blog) and refine the visual design through targeted prompts. The demo creates a four-season survey website with checkboxes for each season and season-specific icons — built entirely through natural language instructions.
Key Takeaways
Agentic IDEs reduce the barrier to entry for web development while giving experienced developers significant productivity gains. You can request code generation, receive detailed implementation reports, and switch between AI models for different approaches to the same problem.