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domain SKILL.md skillA

domain from softtor/nestjs-hexagonal is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add softtor/nestjs-hexagonal/domain@git:20261008.7b451f7

Pins git:20261008.7b451f7 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: softtor/nestjs-hexagonal
Path: skills/domain/SKILL.md
Versions recorded: 4
Latest version: git:20261008.7b451f7, committed Oct 8, 2026
First version recorded: Mar 26, 2026
Size: 20,062 bytes
Repository stars: 5
License: MIT

Use when creating domain layer artifacts for a NestJS bounded context — entities (pure TypeScript), value objects, domain events, repository interfaces, domain services, validators, or data builders. Covers Hexagonal Architecture + DDD with pure events and configurable dispatcher adapters.

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 Layer

The domain layer contains the pure business logic of a bounded context. It has zero framework dependencies. No `@Injectable`, no `PrismaService`, no HTTP concerns.

---

## Decision Tree

What are you creating?

```
Domain artifact needed?
│
├── An entity (aggregate root with lifecycle methods)
│   └── Go to: Entity Pattern
│
├── A simple value (email, amount, name, phone)
│   └── Go to: VO — Scalar
│
├── A grouped value (address, bank details, money)
│   └── Go to: VO — Composed
│
├── A fixed set of values (payment method, channel type)
│   └── Go to: VO — Enum
│
├── A status with allowed transitions (order status, withdrawal status)
│   └── Go to: VO — State Machine
│
├── The persistence contract for the entity
│   └── Go to: Repository Interface
│
├── Something that happened in the domain
│   └── Go to: Domain Events
│
├── Logic that belongs to the domain but not to one entity
│   └── Go to: Domain Services
│
├── A domain-specific error with context
│   └── Go to: Domain Errors
│
├── Entity invariant enforcement (field-level rules)
│   └── Go to: Validators
│
└── Fake data for tests
    └── Go to: Data Builders
```

---

## Entity Pattern
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add softtor/nestjs-hexagonal/domain@sha256:dc8ef6adad8af7e3

The line at the top of this page pins the label git:20261008.7b451f7, 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](https://markdownregistry.com/badge/art_l2fu5olt6onowgm2.svg)](https://markdownregistry.com/a/art_l2fu5olt6onowgm2)

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

Versions

The registry has recorded 4 versions of this file, between Mar 26, 2026 and Oct 8, 2026, about one every 65 days.

version	committed	commit	size	audit
git:20261008.7b451f7 latest	2026-10-08	7b451f7	20,062 B	A	view · diff
git:20260327.3ac41d8	2026-03-27	3ac41d8	19,576 B	A	view · diff
git:20260327.2694398	2026-03-27	2694398	19,469 B	A	view · diff
git:20260326.a4e1dae	2026-03-26	a4e1dae	18,142 B	A	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 (20062 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

softtor/nestjs-hexagonal · 5 stars · license MIT · pushed 2026-10-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_l2fu5olt6onowgm2
GET https://markdownregistry.com/api/v1/resolve?ref=softtor/nestjs-hexagonal/domain
GET https://markdownregistry.com/api/v1/blob/dc8ef6adad8af7e365c752f7aed1c0a31537ddaa2b40edd10f2dd2636100fe12

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.