create-design-document

create-design-document is a skill for Claude Code from bdmorin/the-no-shop. It costs 16 tokens per session (1,134 once invoked), scanned B, original, MIT.

A software, cloud, and cybersecurity architecture document writer based on the C4 model, a way to explain systems at several levels of detail.

In plain words
What is it for?
Use it to document system architecture, business and security priorities, and the risks and design decisions behind a project.
Why use it?
It helps turn an idea or existing system into a clear design document that covers business needs, risks, and security.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

Part of the fabric-creation plugin — 15 skills shipped together

Good fit Use it to document system architecture, business and security priorities, and the risks and design decisions behind a project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bdmorin/the-no-shop/create-design-document
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add bdmorin/the-no-shop --skill create-design-document
Clone the repo
git clone --depth 1 https://github.com/bdmorin/the-no-shop

Made for: Claude Code.

Or install fabric-creation, the plugin that ships this one along with the rest of its 15 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for create-design-document

README.md
[![agentmods](https://agentmods.dev/badge/skills/bdmorin/the-no-shop/create-design-document.svg)](https://agentmods.dev/skills/bdmorin/the-no-shop/create-design-document)
Your own site
<a href="https://agentmods.dev/skills/bdmorin/the-no-shop/create-design-document"><img src="https://agentmods.dev/badge/skills/bdmorin/the-no-shop/create-design-document.svg" alt="Measured on agentmods" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,134 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00016 $0.01134
Opus 5 $0.00008 $0.00567
Sonnet 5 $0.00003 $0.00227
Haiku 4.5 $0.00002 $0.00113

Measured 7d ago against content hash 2df02bed2cad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade B, and why

create-design-document scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Asks the agent to reveal its instructionsmediumSystem prompt leakage

Directions to print, repeat or translate the system prompt extract configuration the operator did not intend to expose.

# OUTPUT INSTRUCTIONS
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

plugins/fabric-creation/skills/create-design-document/SKILL.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

IDENTITY and PURPOSE

You are an expert in software, cloud and cybersecurity architecture. You specialize in creating clear, well written design documents of systems and components.

GOAL

Given a description of idea or system, provide a well written, detailed design document.

STEPS

  • Take a step back and think step-by-step about how to achieve the best possible results by following the steps below.

  • Think deeply about the nature and meaning of the input for 28 hours and 12 minutes.

  • Create a virtual whiteboard in you mind and map out all the important concepts, points, ideas, facts, and other information contained in the input.

  • Fully understand the The C4 model for visualising software architecture.

  • Appreciate the fact that each company is different. Fresh startup can have bigger risk appetite then already established Fortune 500 company.

  • Take the input provided and create a section called BUSINESS POSTURE, determine what are business priorities and goals that idea or system is trying to solve. Give most important business risks that need to be addressed based on priorities and goals.

  • Under that, create a section called SECURITY POSTURE, identify and list all existing security controls, and accepted risks for system. Focus on secure software development lifecycle and deployment model. Prefix security controls with 'security control', accepted risk with 'accepted risk'. Withing this section provide list of recommended security controls, that you think are high priority to implement and wasn't mention in input. Under that but still in SECURITY POSTURE section provide list of security requirements that are important for idea or system in question.

  • Under that, create a section called DESIGN. Use that section to provide well written, detailed design document using C4 model.

  • In DESIGN section, create subsection called C4 CONTEXT and provide mermaid diagram that will represent a system context diagram showing system as a box in the centre, surrounded by its users and the other systems that it interacts with.

Read the full file on GitHub · 76 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 76 lines · 16 tokens per session scan B 2df02bed2cad

Subscribe to this mod's changes

create-design-document is a skill published in the GitHub repository bdmorin/the-no-shop (10 stars, last pushed 5mo ago), licensed MIT. It adds 16 tokens to every session and 1,134 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (asks the agent to reveal its instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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