---
title: "Phase-per-command folder pipeline · agent topology · Agent Fieldbook"
url: https://agentfieldbook.org/design/topologies/spec-driven-workflow/
description: "A single-agent workflow driven by a folder tree (.specify/) plus a fixed phase sequence: constitution, specify, plan, tasks, implement. Each phase reads and writes markdown artefacts in its own directory; the filesystem carries state between commands."
section: "Design · Topologies"
source: Agent Fieldbook — generated from the published page
---

# Phase-per-command folder pipeline

A single-agent workflow driven by a folder tree (.specify/) plus a fixed phase sequence: constitution, specify, plan, tasks, implement. Each phase reads and writes markdown artefacts in its own directory; the filesystem carries state between commands.

Verified against [github.blog](https://github.blog/ai-and-ml/generative-ai/spec-driven-development-with-ai-get-started-with-a-new-open-source-toolkit/)

- [github.blog](https://github.blog/ai-and-ml/generative-ai/spec-driven-development-with-ai-get-started-with-a-new-open-source-toolkit/)

## At a glance

| Field | Value |
| --- | --- |
| Pattern | Phase-per-command folder pipeline |
| State model | workspace |
| Example | GitHub Spec-Kit |

## Basis

## Verified against

- [https://github.blog/ai-and-ml/generative-ai/spec-driven-development-with-ai-get-started-with-a-new-open-source-toolkit/](https://github.blog/ai-and-ml/generative-ai/spec-driven-development-with-ai-get-started-with-a-new-open-source-toolkit/)

The corpus does not rewrite vendor documentation. Where copy is quoted verbatim it is marked as such and attributed to its source.