vertical-slice-architecture SKILL.md skillA
vertical-slice-architecture from mryll/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mryll/skills/vertical-slice-architecture@v1.0.3Pins v1.0.3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mryll/skills
- Path
skills/vertical-slice-architecture/SKILL.md- Versions recorded
- 5
- Latest version
- v1.0.3, committed Jun 2, 2026
- First version recorded
- Feb 27, 2026
- Size
- 5,380 bytes
- Repository stars
- 9
- License
- MIT
Enforce Vertical Slice Architecture (VSA) when building applications in any language (Go, .NET/C#, Java, Kotlin, TypeScript, Python, etc.) and any type (web API, mobile backend, CLI, event-driven). Organize code by feature/use-case instead of technical layers. Each feature is a self-contained vertical slice with a single entry point that receives the router/framework handle and its dependencies. Use when the user says "vertical slice architecture", "VSA", "organize by feature…
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
# Vertical Slice Architecture
## Quick Reference: The 5 Rules
1. **One feature = one directory** containing handler, request/response types, validation, and tests
2. **One entry point per feature** — a setup/registration function that receives the router and dependencies. Name varies by convention (`Setup`, `RegisterRoute`, `Map`); the role is the invariant, not the name.
3. **Minimize coupling between slices, maximize coupling within a slice**
4. **No premature abstractions** — no shared repository/service layers until genuine duplication emerges across multiple slices
5. **Test each feature primarily through its entry point**, verifying outcomes (DB state, API calls, response). Platform/adapter tests are also encouraged.
## Project Structure
```
{project}/
features/ # or internal/features/ (Go), Features/ (.NET)
{domain}/ # orders/, users/, kvs/
{operation}/ # create/, list/, delete/
handler # Single entry point + orchestration
request/response # DTOs
validator # Input validation (optional)
test # Co-located integration test
…Read the whole file at its exact version.
How to install
mdr add mryll/skills/vertical-slice-architecture@sha256:a495ecc9094cff16The line at the top of this page pins the label v1.0.3, 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_g3xmmw2a74foqf2n)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Feb 27, 2026 and Jun 2, 2026, about one every 24 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.3 latest | 2026-06-02 | faf19b2 | 5,380 B | A | view · diff |
| v1.0.2 | 2026-06-01 | 64425a4 | 5,382 B | A | view · diff |
| v1.0.1 | 2026-05-07 | 6ac915e | 5,379 B | A | view · diff |
| v1.0.0 | 2026-03-02 | 26ede52 | 5,379 B | A | view · diff |
| git:20260227.268bada | 2026-02-27 | 268bada | 5,364 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 (5380 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
mryll/skills · 9 stars · license MIT · pushed 2026-10-16 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_g3xmmw2a74foqf2n GET https://markdownregistry.com/api/v1/resolve?ref=mryll/skills/vertical-slice-architecture GET https://markdownregistry.com/api/v1/blob/a495ecc9094cff163198842aa77f1a53ebce1c8cf12ed73995e26fcda4ce47d9
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.