Spec Driven Development: A Hello World Exercise for AI-Driven SDLC

GitHub spec-driven development is reshaping how engineers approach the software development lifecycle – and in this video, John Capobianco walks through his first hands-on attempt using the GitHub Spec Kit to build a browser-based side-scrolling game from scratch, entirely with Claude as the AI backbone. This is spec-driven development (SDD) in action: no code written until the constitution, specification, clarify, plan, and task phases are complete. John demonstrates the full workflow, from project initialization through AI-generated assets using the Gemini API, making this a practical hello world for anyone exploring AI-driven SDLC workflows. John also previews what's coming next: applying spec-driven development directly to the Itential platform to build automated network workflows – proving this methodology extends well beyond game dev into enterprise network automation. In this video: 0:00 Introduction: Spec-Driven Development vs. Test-Driven Development 0:40 GitHub Spec Kit Overview 1:43 Project Setup: Hello World Side-Scroller 3:37 Initializing the Project with Claude 4:26 Step 1 – Constitution: Defining Project Principles 7:23 Step 2 – Specify: Writing the Feature Specification 11:34 Step 3 – Clarify: Surfacing Gaps & Answering Design Questions 18:18 Step 4 – Plan: Generating the Architecture & Research Docs 24:53 Step 5 – Tasks: Breaking Down 33 Implementation Tasks 28:34 Step 6 – Analyze: Cross-Artifact Consistency Check 33:19 Step 7 – Implement: Claude Writes the Code 38:09 First Run: Testing the Working Side-Scroller 40:06 Amending the Spec: Iterating Without Touching Code 46:14 Re-running Clarify, Plan & Tasks for Sprite Generation 54:35 Implement Pass 2: AI-Generated Assets via Gemini (Nano Banana 2) 58:13 Results, Flaws & What's Coming Next 🔗 Learn how Itential uses AI-driven automation for network orchestration → https://itential.com/solutions/network-orchestration/ 🔗 Explore the Itential Platform → https://www.itential.com/cloud-platform/overview/ ___________________ Itential is the infrastructure and network orchestration platform for the AI era. Our cloud-native solution unifies lifecycle operations across hybrid network and cloud environments, empowering enterprises to automate everything from configuration management and compliance to service delivery. With support for both low-code orchestration and high-code extensibility, Itential enables teams to build, adapt, and scale automations faster. Through agentic orchestration via MCP and intelligent workflows, Itential connects IT systems, CI/CD pipelines, and network infrastructure to deliver secure, end-to-end automation that’s ready for the next generation of digital and AI-driven operations. Watch Itential’s full video catalog: https://www.youtube.com/c/Itential/videos X ➡️ https://x.com/Itential LinkedIn ➡️ https://www.linkedin.com/company/itential/ Follow John: X ➡️ https://x.com/John_Capobianco LinkedIn ➡️ https://www.linkedin.com/in/john-capobianco-644a1515/ Visit our website: https://www.itential.com/