python-backend-expert SKILL.md skillA
python-backend-expert from mathisk2095/jko-claude-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mathisk2095/jko-claude-plugins/python-backend-expert@git:20260316.59861c1Pins git:20260316.59861c1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mathisk2095/jko-claude-plugins
- Path
plugins/python-backend/skills/python-backend-expert/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260316.59861c1, committed Mar 16, 2026
- Size
- 11,693 bytes
- Repository stars
- 3
- License
- MIT
This skill should be used when the user is writing, reviewing, debugging, or architecting Python backend code using Litestar or FastAPI with SQLAlchemy or Advanced Alchemy. Provides expert critique covering SOLID principles, hexagonal architecture, repository/service patterns, dependency injection, async correctness, ORM usage, API design, anti-pattern detection, and modern Python patterns for mature production backends. Use when the user asks "critique my Python backend…
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
Write production-grade Python backends. Not scripts. Not notebooks. Not prototypes. Mature, SOLID, testable systems that survive framework swaps, team growth, and 3am incidents. ## Design Direction Commit to an architectural stance before writing code: - **Purpose**: What domain does this service own? What is its single bounded context? - **Boundaries**: Where does the domain end and infrastructure begin? Draw the line. - **DI Strategy**: How do dependencies flow? Constructor injection, framework DI, or container? - **Data Flow**: Request -> Controller -> Service -> Repository -> Domain Entity -> Response DTO. Never skip layers. **CRITICAL**: The architecture serves the domain, not the framework. If replacing Litestar with FastAPI would require rewriting business logic, the boundaries are wrong. ## Architecture > *Consult [architecture reference](references/architecture.md) for hexagonal patterns, layer rules, and directory structure.* Dependencies point inward. Domain imports nothing from infrastructure. Controllers are thin. Services orchestrate. Repositories hide persistence. The composition root wires everything together. …
Read the whole file at its exact version.
How to install
mdr add mathisk2095/jko-claude-plugins/python-backend-expert@sha256:0fda8fa2775ca65fThe line at the top of this page pins the label git:20260316.59861c1, 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_wvggc6drqiun6iqt)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 16, 2026.
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 (11693 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
mathisk2095/jko-claude-plugins · 3 stars · license MIT · pushed 2026-10-13 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wvggc6drqiun6iqt GET https://markdownregistry.com/api/v1/resolve?ref=mathisk2095/jko-claude-plugins/python-backend-expert GET https://markdownregistry.com/api/v1/blob/0fda8fa2775ca65fbb8be26309bdd196c6f671c5c1ec1be49ef60fa8447b9d9e
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.