domain-model SKILL.md skillA

domain-model from stevepolitodesign/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add stevepolitodesign/skills/domain-model@git:20260915.6a51426

Pins git:20260915.6a51426 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
stevepolitodesign/skills
Path
domain-model/SKILL.md
Versions recorded
2
Latest version
git:20260915.6a51426, committed Sep 15, 2026
First version recorded
Sep 10, 2026
Size
9,348 bytes
Repository stars
10
License
none declared

Turn a described business process into a domain model.

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

# Domain model

The user describes how their business actually works. You come back with the concepts hiding in that description — and every one of them traces to something they said. An invented model is worse than none: it's fluent, confident, wrong, and in six months it's in the code under a name nobody in the business recognizes.

Five things come out, and nothing else:

| | |
| --- | --- |
| **Language** | The words the business uses, meaning what the business means. |
| **Flow** | The events, in order. Past tense — something became true. |
| **Rules** | Whenever X happens, we do Y. The branches and the exceptions. |
| **Aggregates** | Whatever protects a rule and emits those events. |
| **Contexts** | Where a word stops meaning one thing and starts meaning another. |

No entities-versus-value-objects, no repositories, no schema, no class diagram — those are implementation, and this is what implementation gets checked against. Don't read code either. The code already chose names, and the ones it chose are the loudest thing in the room; read them and they end up in the model, at which point the model can only tell you what the code already says.

## Workflow
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add stevepolitodesign/skills/domain-model@sha256:f8b7c951c9f0439c

The line at the top of this page pins the label git:20260915.6a51426, 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_cw5qqe6755mmdagr.svg)](https://markdownregistry.com/a/art_cw5qqe6755mmdagr)

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

Versions

The registry has recorded 2 versions of this file, between Sep 10, 2026 and Sep 15, 2026, about one every 5 days.

versioncommittedcommitsizeaudit
git:20260915.6a51426 latest2026-09-15 6a51426 9,348 BA view · diff
git:20260910.a0e9dc72026-09-10 a0e9dc7 9,379 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 (9348 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

stevepolitodesign/skills · 10 stars · license none declared · pushed 2026-11-05 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_cw5qqe6755mmdagr
GET https://markdownregistry.com/api/v1/resolve?ref=stevepolitodesign/skills/domain-model
GET https://markdownregistry.com/api/v1/blob/f8b7c951c9f0439c61614eac99bae986bdbea2ad579d7c6bfb6eab38d5073310

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.

More from stevepolitodesign/skills

ask-claude SKILL.md skill
stevepolitodesign/skills · ask-claude/SKILL.md · Recommend the best way to have Claude do something, checked against Anthropic's current docs, then write the prompt and…
git:20261014.fe9e53f · audit A · 10 stars
commit SKILL.md skill
stevepolitodesign/skills · commit/SKILL.md · Commit the current changes as atomic commits, recording risks, tradeoffs, and alternatives considered.
git:20260925.01f2dea · audit A · 10 stars
diff-explainer SKILL.md skill
stevepolitodesign/skills · diff-explainer/SKILL.md · Builds a shareable HTML walkthrough of the current changes, highlighting risks, tradeoffs, and alternatives considered.
git:20261104.fc359ac · audit A · 10 stars
eli5 SKILL.md skill
stevepolitodesign/skills · eli5/SKILL.md · Explain something to someone who knows nothing about it.
git:20261104.06b438d · audit A · 10 stars
implement-with-tdd SKILL.md skill
stevepolitodesign/skills · implement-with-tdd/SKILL.md · Implement a SPEC, plan, or feature outside-in, with TDD.
git:20260916.114dbbf · audit A · 10 stars
multi-lens-review SKILL.md skill
stevepolitodesign/skills · multi-lens-review/SKILL.md · Review a change for defects, then against its spec, its codebase's conventions, the domains trying to emerge from it…
git:20260926.c0ccd57 · audit A · 10 stars
pr SKILL.md skill
stevepolitodesign/skills · pr/SKILL.md · Open a pull request whose description you write yourself, with a suggested title and a light proofread.
git:20261105.1f2e432 · audit A · 10 stars
preparatory-refactor SKILL.md skill
stevepolitodesign/skills · preparatory-refactor/SKILL.md · Identify opportunities to introduce a refactor that would make a feature easy to implement.
git:20260926.c0ccd57 · audit A · 10 stars
risk-score SKILL.md skill
stevepolitodesign/skills · risk-score/SKILL.md · Score how risky a pull request or branch is with fixed rules, and reply with the result as JSON. Use when asked how…
git:20261105.6b5e67c · audit A · 10 stars
rubber-duck SKILL.md skill
stevepolitodesign/skills · rubber-duck/SKILL.md · Start a rubber duck session.
git:20260926.c0ccd57 · audit A · 10 stars
ship SKILL.md skill
stevepolitodesign/skills · ship/SKILL.md · Implement, verify and review a feature based on its SPEC, then open a draft PR.
git:20261105.4a4785a · audit A · 10 stars
slice SKILL.md skill
stevepolitodesign/skills · slice/SKILL.md · Cut a feature or idea down to one full-stack slice.
git:20261105.0b5f9f2 · audit A · 10 stars

Every file in stevepolitodesign/skills

Other files named domain-model

domain-model SKILL.md skill
asymmetric-al/core · .agents/skills/domain-model/SKILL.md · Alias for domain-modeling. Use when the user asks for domain modeling, ubiquitous language, domain terminology…
git:20260709.906b9e6 · audit A · 370 stars
domain-model SKILL.md skill
thoughtbot/rails-consultant · skills/domain-model/SKILL.md · Turn a described business process into a domain model.
git:20261106.ce8ab68 · audit A · 29 stars
domain-model SKILL.md skill
andreibesleaga/gabbe · plugins/gabbe-architecture/skills/domain-model/SKILL.md · Create or review a domain model — bounded contexts, entities, value objects, aggregates, domain events, relationships…
git:20261014.de0823c · audit A · 23 stars

Browse by kind, by grade A, or by owner.