Spec-driven development, yes, but

Finished this course from DeepLearning.AI: Spec-Driven Development with Coding Agents.

Spec-driven development definitely makes sense — especially for demos, PoCs, and smaller projects. Writing clear specs helps reduce randomness and keeps AI agents aligned with your intent.

But when it comes to large, existing systems, I’m not fully convinced yet.

In reality, maintaining detailed specs at scale means:

• a lot of documentation overhead
• constant need to keep specs in sync with evolving code
• additional context management on top of already complex systems

First published on LinkedIn, April 16, 2026.