---
title: "spec-writer"
description: "An expert-guided skill for creating layered software specification documents for greenfield projects. Produces Vision, Business Requirements, Software Requirements, Architecture & Design, and Behavioral Spec & Test Verif"
canonical: https://agentpluginsdirectory.com/plugins/spec-writer
last-updated: 2026-10-12
---

# spec-writer
An expert-guided skill for creating layered software specification documents for greenfield projects. Produces Vision, Business Requirements, Software Requirements, Architecture & Design, and Behavioral Spec & Test Verification documents.
- Slug: spec-writer
- Publisher: Florian Buetow
- Repository: https://github.com/florianbuetow/codex-plugins
- Manifest: plugins/spec-writer/plugin.json
- Version: 1.0.1
- License: MIT
- Category (editorial): other
- Skills: 1 (spec-writer)
- MCP servers: 0
- Stars: 0
- Repository created: 2026-09-10
- Repository last pushed: 2026-10-11
- Publisher type: User
- Listing: https://agentpluginsdirectory.com/plugins/spec-writer
- Schema: https://agent-plugins.org/schemas/1.0.0/plugin.schema.json

## What spec-writer does, in the publisher's words

> Generated for Codex from the canonical source plugin. Run just update at the marketplace root to refresh it.

An expert-guided skill for creating layered software specification documents for greenfield projects. Produces Vision, Business Requirements, Software Requirements, Architecture & Design, and Behavioral Spec & Test Verification documents.

Register the repository marketplace with codex plugin marketplace add., then run codex plugin add spec-writer@florianbuetow-codex-plugins or install it from Florian Buetow Codex Plugins in the Plugins Directory. Invoke its workflows with $.

From the project README, punctuation lightly normalized. Full text: https://raw.githubusercontent.com/florianbuetow/codex-plugins/HEAD/plugins/spec-writer/README.md