ddd-module-pattern

ddd-module-pattern is a skill for Claude Code, Codex from amadeus-dlc/amadeus. It costs 65 tokens per session (318 once invoked), scanned A, original, Apache-2.0.

Guidance for organizing Domain-Driven Design (DDD) modules around business areas. A module hides its internal implementation and exposes only the small set of operations and types other parts need.

In plain words
What is it for?
Use it to design module boundaries, package layouts, bounded contexts, public APIs, visibility rules, and communication between modules.
Why use it?
It prevents business concepts from being mixed together and reduces accidental dependencies on databases, frameworks, or internal code.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/amadeus-dlc/amadeus/ddd-module-pattern
Any agent
npx skills add amadeus-dlc/amadeus --skill ddd-module-pattern
Clone the repo
git clone --depth 1 https://github.com/amadeus-dlc/amadeus

Made for: Claude Code, Codex.

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 ddd-module-pattern

README.md
[![agentmods](https://agentmods.dev/badge/skills/amadeus-dlc/amadeus/ddd-module-pattern.svg)](https://agentmods.dev/skills/amadeus-dlc/amadeus/ddd-module-pattern)
Your own site
<a href="https://agentmods.dev/skills/amadeus-dlc/amadeus/ddd-module-pattern"><img src="https://agentmods.dev/badge/skills/amadeus-dlc/amadeus/ddd-module-pattern.svg" alt="Measured on agentmods" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 318 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00065 $0.00318
Opus 5 $0.00032 $0.00159
Sonnet 5 $0.00013 $0.00064
Haiku 4.5 $0.00006 $0.00032

Measured 4d ago against content hash d35a69298272, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ddd-module-pattern scanned grade A with 0 findings 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 4d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

amadeus/spaces/default/knowledge/amadeus-shared/software-design/ddd-module-pattern/SKILL.md · 44 lines

What it actually says

DDD Module Pattern

A DDD module should hide implementation detail and expose a small language-shaped API.

Workflow

  1. Identify the bounded context or subdomain the module represents.

  2. Group aggregates, value objects, domain services, policies, and events by domain concept.

  3. Expose only stable commands, queries, ports, and domain types needed by other modules.

  4. Keep persistence mapping and framework glue outside the domain module or behind adapters.

  5. Use language visibility features to enforce the boundary.

Checks

  • Module names should be domain terms, not technical layers alone.

  • Public APIs should be smaller than internal files.

  • Cross-module calls should go through explicit interfaces or application services.

  • Shared kernels must stay small and stable.

Reference

Read references/language-guides.md for language-specific visibility and package patterns.

Detailed Reference

For non-trivial implementation, review, or refactoring work, read references/details.md before giving final guidance. It contains the detailed rules, examples, smells, and migration notes that do not belong in the short invocation body.

Output

Return a proposed module tree, public API, hidden internals, and dependency direction.

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 4d ago First seen · 44 lines · 65 tokens per session scan A d35a69298272

Subscribe to this mod's changes

ddd-module-pattern is a skill published in the GitHub repository amadeus-dlc/amadeus (8 stars, last pushed 13d ago), licensed Apache-2.0. It adds 65 tokens to every session and 318 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.