---
id: post/katson-com/4756
type: post
title: Spec-Driven Development — The Way to Build Apps with Agents
summary: Spec-Driven Development is a methodology for building Business Central extensions with AI agents, where structured specifications capture architecture decisions before code is written. This approach maintains consistency across multiple development sessions and prevents agents from reinventing patterns or making conflicting decisions.
tier: community
language: en
tags:
  - agentic development
  - spec-driven development
  - al coding
  - ai agents
  - codebase consistency
  - workflow methodology
system: development
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    title: Spec-Driven Development — The Way to Build Apps with Agents
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    title: Spec-Driven Development — The Way to Build Apps with Agents
    date: "2026-05-17"
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    quote: The spec is the brain, the agent is the muscle.
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    title: Spec-Driven Development — The Way to Build Apps with Agents
    date: "2026-05-17"
    commit: null
    t: null
    quote: The specs survive session resets. The agent forgets everything when you create new the chat. The spec doesn't.
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post_id: "4756"
source_id: katson-com
source_name: Katson.com
url: https://katson.com/spec-driven-development-the-way-to-build-apps-with-agents/?utm_source=rss&utm_medium=rss&utm_campaign=spec-driven-development-the-way-to-build-apps-with-agents
published_at: "2026-05-17T08:35:52.000Z"
author: Dmitry Katson
full_text: false
words: 933
quotes:
  - text: The spec is the brain, the agent is the muscle.
    why_it_matters: Encapsulates the core principle that humans provide strategic direction and decisions while agents handle implementation
  - text: The specs survive session resets. The agent forgets everything when you create new the chat. The spec doesn't.
    why_it_matters: Explains why written specifications are essential when working with AI agents that lose context between sessions
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---

# Spec-Driven Development — The Way to Build Apps with Agents

[Read the post](https://katson.com/spec-driven-development-the-way-to-build-apps-with-agents/?utm_source=rss&utm_medium=rss&utm_campaign=spec-driven-development-the-way-to-build-apps-with-agents) · Katson.com (Dmitry Katson, MVP) · 2026-05-17 · 933 words · tier community · reviewed (checked by Opus)

> Spec-Driven Development is a methodology for building Business Central extensions with AI agents, where structured specifications capture architecture decisions before code is written. This approach maintains consistency across multiple development sessions and prevents agents from reinventing patterns or making conflicting decisions.

## Key points

- SDD uses a project constitution including brief.md, tech-design.md, roadmap.md, and AGENTS.md to maintain project memory across agent sessions
- Developers write feature specifications with requirements and acceptance criteria before asking agents to code, staying in control of architecture decisions
- One chat per feature keeps context clean, and consistent coding rules ensure coherent output regardless of which developer or AI model works on the codebase
- The approach prevents vibe-coding chaos where multiple agents or developers produce inconsistent code by establishing the spec as the authoritative brain

## Quotes

- "The spec is the brain, the agent is the muscle." (Encapsulates the core principle that humans provide strategic direction and decisions while agents handle implementation)
- "The specs survive session resets. The agent forgets everything when you create new the chat. The spec doesn't." (Explains why written specifications are essential when working with AI agents that lose context between sessions)

## Context

- Features: Spec-Driven Development, feature specifications, project constitution, coding rules, session management, architecture documentation

Source: Katson.com, community blog. Summary, key points and quotes are derived (CONTENT-NOTICE.md); read the original for the full text.