hexagonal-arch SKILL.md skillA
hexagonal-arch from ralvarez-ai/ralvaskills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ralvarez-ai/ralvaskills/hexagonal-arch@v1.1.0Pins v1.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ralvarez-ai/ralvaskills
- Path
skills/design/hexagonal-arch/SKILL.md- Versions recorded
- 3
- Latest version
- v1.1.0, committed Jul 8, 2026
- First version recorded
- May 21, 2026
- Size
- 9,899 bytes
- Repository stars
- 4
- License
- GPL-3.0
Hexagonal architecture (ports & adapters) — dependencies point inward; domain declares ports, adapters implement them; domain never imports framework/DB/HTTP. Dependency graph is prescribed, folder layout is not. Use when designing service structure, placing interfaces, or evaluating seam cleanliness.
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
# Hexagonal Architecture — Ports & Adapters The pattern, distilled: **the domain core knows nothing about the world**. Everything that touches the outside (HTTP, DB, queue, cron, third-party API) is an adapter. Adapters depend on the domain; the domain never depends on adapters. Pairs with [ddd-architect](../ddd-architect/SKILL.md) — DDD answers "what's in the domain"; hexagonal answers "where does the domain live and what touches it". ## 1. The pattern Three layers, named by their role rather than their location: - **Domain core** — entities, value objects, aggregates, domain services, business policies. Plain language types and functions. No imports from any framework, database driver, or HTTP library. - **Ports** — interfaces declared *by the domain* describing what it needs from the outside (`UserRepo`, `EmailSender`, `PaymentGateway`). The names are domain-meaningful, not technology-meaningful (`UserRepo`, not `PostgresClient`). - **Adapters** — concrete implementations of ports. Live outside the domain. One adapter per concrete technology: `PostgresUserRepo`, `SmtpEmailSender`, `StripePaymentGateway`. Also one per testing strategy: `InMemoryUserRepo`, `FakeEmailSender`. …
Read the whole file at its exact version.
How to install
mdr add ralvarez-ai/ralvaskills/hexagonal-arch@sha256:6f2bd12c7fb2a641The line at the top of this page pins the label v1.1.0, 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.
[](https://markdownregistry.com/a/art_6ljcr2gfcphzbggo)
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Versions
The registry has recorded 3 versions of this file, between May 21, 2026 and Jul 8, 2026, about one every 24 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.0 latest | 2026-07-08 | 8572b29 | 9,899 B | A | view · diff |
| v1.0.0 | 2026-05-22 | f678526 | 9,334 B | A | view · diff |
| v1.0.0 | 2026-05-21 | bdf342e | 9,328 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9899 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
ralvarez-ai/ralvaskills · 4 stars · license GPL-3.0 · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6ljcr2gfcphzbggo GET https://markdownregistry.com/api/v1/resolve?ref=ralvarez-ai/ralvaskills/hexagonal-arch GET https://markdownregistry.com/api/v1/blob/6f2bd12c7fb2a641758c192280f453076e0f07f334a847c24f8f6916a09cc87e
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.