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application SKILL.md skillA

application 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/application@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/application/SKILL.md
Versions recorded: 5
Latest version: git:20261008.7b451f7, committed Oct 8, 2026
First version recorded: Mar 26, 2026
Size: 18,663 bytes
Repository stars: 5
License: MIT

Use when creating application layer artifacts for a NestJS bounded context — use cases, CQRS command/query handlers, DTOs, ports (cross-module interfaces), application services, or read model projections. Supports three patterns: plain UseCase (A), CQRS native (B), and Handler-as-Orchestrator (C).

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

> **Note:** Examples use `companyId` as the multi-tenant identifier. Replace with your project's term (e.g., `organizationId`, `tenantId`).

# Application Layer

This skill covers everything inside a bounded context's `application/` directory:
use cases, CQRS handlers, DTOs, ports, application services, and Redis read models.

---

## 1. Pattern Selection

Work through this flowchart before writing a single line of code.

```
Does the module already use CQRS (CommandBus / QueryBus)?
├── No  → Pattern A (plain UseCase + TOKEN)
└── Yes →
        Is this a simple read (findById) with no RBAC or transformation?
        ├── Yes → Skip use case — inject repository directly in controller
        └── No  →
                Does orchestration span multiple services (QueryBus calls,
                multiple ports, complex enrichment)?
                ├── Yes → Pattern C (Handler as Orchestrator)
                └── No  → Pattern B (CQRS Command/Query)

Need read model / projections?
└── CQRS R/W separation: write side → Pattern B/C, read side → Redis query handler
    (see references/read-model-patterns.md)

Reusable logic between 2+ handlers?
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add softtor/nestjs-hexagonal/application@sha256:91e905c812bb0531

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_kknio23iboj32fsd.svg)](https://markdownregistry.com/a/art_kknio23iboj32fsd)

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

Versions

The registry has recorded 5 versions of this file, between Mar 26, 2026 and Oct 8, 2026, about one every 49 days.

version	committed	commit	size	audit
git:20261008.7b451f7 latest	2026-10-08	7b451f7	18,663 B	A	view · diff
git:20260920.ed50a26	2026-09-20	ed50a26	18,175 B	A	view · diff
git:20260327.3ac41d8	2026-03-27	3ac41d8	18,173 B	A	view · diff
git:20260327.2694398	2026-03-27	2694398	18,080 B	A	view · diff
git:20260326.a4e1dae	2026-03-26	a4e1dae	17,939 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 (18663 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_kknio23iboj32fsd
GET https://markdownregistry.com/api/v1/resolve?ref=softtor/nestjs-hexagonal/application
GET https://markdownregistry.com/api/v1/blob/91e905c812bb053109bde9f25ec38cf946d504d33eb5f4f1f44152cb1723f1b4

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.