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Dev.to
8/1/2026
Code First, Specs After: A Practical Guide to AI-Driven Development

Code First, Specs After: A Practical Guide to AI-Driven Development

Short summary

The article proposes a dual methodology for AI-driven development: Spec-Driven Development (write specs first, then guide AI implementation) and Code-First Spec-Backfill Development (implement code first, then update specs to match). Together they keep code and specifications continuously aligned, addressing the common problem where AI-generated code diverges from documentation. The approach targets teams using Claude Code or GitHub Copilot who struggle with outdated or missing specs.

  • Proposes combining Spec-Driven Development with Code-First Spec-Backfill Development
  • Addresses code-spec divergence common in AI-assisted development
  • Targets teams using Claude Code or GitHub Copilot daily

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