𝗪𝗵𝗮𝘁 𝗜𝘀 𝗦𝗽𝗲𝗰-𝗗𝗿𝗶𝘃𝗲𝗻 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁?
Most AI coding starts the same way. You give an agent a short prompt. You watch it write code. It looks fast. Then you realize the agent built the wrong thing. You spend an hour fixing it.
The agent did not struggle to write code. It struggled to understand your intent.
Spec-driven development fixes this. Instead of prompting for code, you create a spec first. This spec is a written plan. You correct the plan until it is right. Only then do you let the agent build.
New tools like AWS Kiro and GitHub spec-kit make this easy. But the idea is old. It is just good engineering.
A good spec has three parts:
• Requirements: What the feature does and how to measure success. This describes behavior, not code. • Design: The technical plan. This includes architecture, data models, and constraints. • Tasks: Small, testable units. These are simple enough for an agent to finish in one go.
Each part feeds the next. Requirements guide the design. The design creates the tasks. The tasks guide the agent.
In the past, writing code was slow. Writing specs felt like a waste of time. Now, AI writes code in minutes. The bottleneck is no longer typing. The bottleneck is deciding exactly what to build.
A spec moves your mistakes to a cheap place. A wrong sentence in a document is easy to fix. A wrong implementation in a codebase is expensive to undo.
Reviewing code is hard. You have to reverse-engineer what the author meant. Reviewing a spec is easy. You agree on the intent before any code exists.
This method also helps you scale. You can give different tasks to different agents. The spec acts as a contract to keep them aligned.
This approach is not always the answer.
- It is overkill for small fixes. Do not write a spec for a one-line change.
- Specs can go stale. If the code changes but the spec does not, the spec becomes a lie.
- Agents do not always obey. A spec reduces confusion, but you must still review the output.
Use a spec to make your intent clear. Use it to catch mistakes while they are still just words.
Source: https://dev.to/jcamarate/what-is-spec-driven-development-with-ai-coding-agents-56mc
Optional learning community: https://t.me/GyaanSetuAi