http://akjamie.github.io/tags/spec-driven-development/ Recent content in Spec-Driven Development on Jamie's Blog Hugo en-us Sun, 01 Nov 2026 00:00:00 +0000 http://akjamie.github.io/post/2026-11-01-agentic-sdlc-dual-pr-governance/ Sun, 01 Nov 2026 00:00:00 +0000 http://akjamie.github.io/post/2026-11-01-agentic-sdlc-dual-pr-governance/ <h1 id="from-ai-first--sdd-to-agentic-sdlc-building-a-dual-pr-governance-engine-for-autonomous-coding">From AI-First + SDD to Agentic SDLC: Building a Dual-PR Governance Engine for Autonomous Coding</h1> <p>Over the past three years, software engineering underwent two quiet revolutions.</p> <p>First came the <strong>AI-Assisted</strong> era. Tools like early GitHub Copilot delivered inline tab-completions. The developer remained the compiler, the architect, and the typist—AI was simply an intelligent autocomplete.</p> <p>Then came the <strong>AI-First</strong> era, powered by <strong>Spec-Driven Development (SDD)</strong>. Senior engineers quickly realized that casual, conversational prompting produced fragile code. To get production-grade output from large language models in environments like <strong>VS Code + GitHub Copilot</strong> and <strong>VS Code + OpenCode</strong>, the industry converged on a disciplined methodology: write formal specifications first. We learned to draft Markdown PRDs, define OpenAPI schemas, and document BDD scenarios (<code>GIVEN / WHEN / THEN</code>) before asking the model to write code. Feeding structured specifications into the model allowed teams to generate entire modules, database schemas, and integration suites cleanly. For teams practicing SDD, AI-first development became the gold standard of productivity.</p>