ddd SKILL.md skillA

ddd from fabiandistler/agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add fabiandistler/agents/ddd@v2.0

Pins v2.0 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
fabiandistler/agents
Path
skills/ddd/SKILL.md
Versions recorded
5
Latest version
v2.0, committed Oct 23, 2026
First version recorded
Oct 12, 2026
Size
8,036 bytes
Repository stars
2
License
none declared

Applies Domain-Driven Design: subdomain classification, context mapping, legacy integration (ACL), tactical pattern choice, and conventions for aggregates, value objects, events, and event sourcing. Use for DDD design or review.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# DDD

Strategic design decides *where* to invest; tactical design decides *how* to build. Match the investment to the value — over-engineering a Supporting subdomain and under-investing a Core one are both failures of the same discipline.

## When to use

Whenever a design conversation touches subdomain classification, buy-vs-build
for a capability, integration with a legacy or third-party system,
bounded-context boundaries, or how much domain modeling a piece of business
logic actually deserves — *and* whenever implementing domain logic, persisting
aggregates, publishing events, or wiring cross-context integration — even if
the user never says "DDD". Use the decision path below for the upfront design
choice, the workflow for the design conversation, and the reference files as
the code-review checklist while writing.

## Core principle

A subdomain's strategic classification
(Core / Generic / Supporting) should drive both *how much* engineering effort
it gets and *which tactical pattern* implements it. Never let architectural
enthusiasm outrun the subdomain's actual importance.

## Decision path
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add fabiandistler/agents/ddd@sha256:0030548531d47a21

The line at the top of this page pins the label v2.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_k7443w7sj4i3xh3u.svg)](https://markdownregistry.com/a/art_k7443w7sj4i3xh3u)

1 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between Oct 12, 2026 and Oct 23, 2026, about one every 3 days.

versioncommittedcommitsizeaudit
v2.0 latest2026-10-23 6421c34 8,036 BA view · diff
v2.02026-10-21 a0a4411 7,897 BA view · diff
v2.02026-10-19 b3c7d90 7,868 BA view · diff
v2.02026-10-16 cecec81 7,762 BA view · diff
v2.02026-10-12 204299c 7,758 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (8036 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

fabiandistler/agents · 2 stars · license none declared · pushed 2026-11-01 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_k7443w7sj4i3xh3u
GET https://markdownregistry.com/api/v1/resolve?ref=fabiandistler/agents/ddd
GET https://markdownregistry.com/api/v1/blob/0030548531d47a210fe7ae8292e00010c12b63cbb765e55b6ab52ae792075b53

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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Every file in fabiandistler/agents

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