The JavaScript AI Build-a-thon is a focused, hands-on initiative that helps builders quickly move from exploration to working AI prototypes. Through concise quests and practical demos, you'll gain real skills with modern AI tools in a clear, outcome-driven format.
If you're building your first AI app or architecting multi-agent systems, the Build-a-thon gives you the tools, the mentorship, and the stage to ship something real.
| Milestone | Date |
|---|---|
| 🎬 Build-a-thon Began | Monday, March 2, 2026 |
| 📚 Quests & Livestreams | March 2 – March 13, 2026 |
| 🔥 Hackathon Phase | Friday, March 13 – Tuesday, March 31, 2026 |
| 🏆 Program Concluded | Tuesday, March 31, 2026 |
The Build-a-thon ran in two phases.
Participants completed guided quests and attended expert-led livestreams to build the skills needed for the hackathon phase. Each quest was hands-on, self-paced, and designed to teach a core AI development pattern with JavaScript/TypeScript:
| Quest | Topic | What You'll Learn |
|---|---|---|
| Quest 1 | Local AI Development with Foundry Local | Run AI models on-device for privacy, speed, and offline access |
| Quest 2 | End-to-End Model Development on Microsoft Foundry | Build, train and deploy custom AI models with Microsoft Foundry's unified platform |
| Quest 3 | Serverless RAG Support System | Build retrieval-augmented generation pipelines with LangChain.js |
| Quest 4 | Build Agents with AI Toolkit | Create AI agents with MCP tools, evaluation, and code export on VS Code |
| Quest 5 | E2E Burger Ordering Agent | Design and run a full agentic system with MCP server integration |
Participation Requirement: Participants were required to complete at least 2 quests (including the guided project) to be eligible for the hackathon phase.
Participants built solutions that matter using everything they learned in the quests and beyond, creating AI Agents that solved real problems, delighted users, and pushed what's possible.
During the hack phase, participants attended technical demos and special Discord Office Hours (8:00 AM PDT) to learn the latest tools and best practices.
| Date (8:00 AM PDT) | Demo | Archive |
|---|---|---|
| March 16 | Azure & Foundry MCP Server Demo | Recording |
| March 18 | Azure Developer CLI (azd) Demo | Recording |
| March 20 | Azure DocumentDB Demo | Recording |
| March 23 | GitHub Copilot CLI & SDK Demo | Recording |
| March 25 | GitHub Agentic Workflows Demo | Recording |
| March 27 | GitHub Copilot App Modernization Demo | Recording |
Join our community to connect with other participants and experts from Microsoft &. GitHub to support your builder journey.
- Foundry Discord (#js-ai-build-a-thon channel): Our platform for office hours, live QnA, quick questions, finding teammates, community & expert support
- Social: Share your progress online using #JSAIBuildathon
The JavaScript AI Build-a-thon (June 2025)
Developers from all over the world joined us in the AI June Jams with JavaScript - turning their real-world ideas into ready AI apps, through this hands-on learning experience!
june2025-spotlight-project.mov
© 2026 JavaScript at Microsoft • Code of Conduct • MIT License

