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Byte-Sized Design

The Future of AI Coding: Spec-Driven Development with GitHub’s New Toolkit

Streamlining the AI-Powered Development Process with Spec Kit

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Byte-Sized Design
Sep 03, 2025
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As coding agents have become more powerful, a new pattern has emerged: you describe your goal, get a block of code back, and often... it looks right, but doesn't quite work. This "vibe-coding" approach can be great for quick prototypes, but less reliable when building serious, mission-critical applications or working with existing codebases.

TLDR

Spec-driven development is the solution. Instead of coding first and writing docs later, you start with a detailed specification that becomes the source of truth for your tools and AI agents to generate, test, and validate code. The result is less guesswork, fewer surprises, and higher quality code.

Why this matters

The issue with the "vibe-coding" approach isn't the coding agent's ability, but our approach. We treat coding agents like search engines when we should be treating them more like literal-minded pair programmers. They excel at pattern recognition but still need unambiguous instructions.

Spec-driven development solves this by making your specification the center of your engineering process. Your primary role is to steer, while the coding agent does the bulk of the writing. This structured workflow turns vague prompts into clear intent that coding agents can reliably execute.

The Spec-Driven Process with Spec Kit

Spec Kit makes your specification the center of your engineering process, with a four-phase approach:

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