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fastapi-expert SKILL.md skillA

fastapi-expert from jeffallan/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add jeffallan/claude-skills/fastapi-expert@v1.1.0

Pins v1.1.0 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: jeffallan/claude-skills
Path: skills/fastapi-expert/SKILL.md
Versions recorded: 5
Latest version: v1.1.0, committed Oct 15, 2026
First version recorded: Mar 6, 2026
Size: 7,073 bytes
Repository stars: 12,006
License: MIT

Use when building high-performance async Python APIs with FastAPI and Pydantic V2. Invoke to create REST endpoints, define Pydantic models, implement authentication flows, set up async SQLAlchemy database operations, add JWT authentication, build WebSocket endpoints, or generate OpenAPI documentation. Trigger terms: FastAPI, Pydantic, async Python, Python API, REST API Python, SQLAlchemy async, JWT authentication, OpenAPI, Swagger Python.

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

# FastAPI Expert

Deep expertise in async Python, Pydantic V2, and production-grade API development with FastAPI.

## When to Use This Skill

- Building REST APIs with FastAPI
- Implementing Pydantic V2 validation schemas
- Setting up async database operations
- Implementing JWT authentication/authorization
- Creating WebSocket endpoints
- Optimizing API performance

## Core Workflow

1. **Analyze requirements** — Identify endpoints, data models, auth needs
2. **Design schemas** — Create Pydantic V2 models for validation
3. **Implement** — Write async endpoints with proper dependency injection
4. **Secure** — Add authentication, authorization, rate limiting
5. **Test** — Write async tests with pytest and httpx; run `pytest` after each endpoint group and verify OpenAPI docs at `/docs`

> **Checkpoint after each step:** confirm schemas validate correctly, endpoints return expected HTTP status codes, and `/docs` reflects the intended API surface before proceeding.

## Minimal Complete Example

Schema + endpoint + dependency injection in one cohesive unit:

```python
# schemas.py
from pydantic import BaseModel, EmailStr, field_validator, model_config

class UserCreate(BaseModel):
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add jeffallan/claude-skills/fastapi-expert@sha256:aec3e59f351cdbaf

The 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_d6o5akue25h63447.svg)](https://markdownregistry.com/a/art_d6o5akue25h63447)

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

Versions

The registry has recorded 5 versions of this file, between Mar 6, 2026 and Oct 15, 2026, about one every 56 days.

version	committed	commit	size	audit
v1.1.0 latest	2026-10-15	a57ac17	7,073 B	A	view · diff
v1.1.0	2026-10-03	958e60f	7,074 B	A	view · diff
v1.1.0	2026-10-03	ec755b7	6,992 B	A	view · diff
v1.1.0	2026-04-29	efebc44	6,898 B	A	view · diff
v1.1.0	2026-03-06	c7afefb	6,807 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 (7073 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

jeffallan/claude-skills · 12,006 stars · license MIT · pushed 2026-10-21 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_d6o5akue25h63447
GET https://markdownregistry.com/api/v1/resolve?ref=jeffallan/claude-skills/fastapi-expert
GET https://markdownregistry.com/api/v1/blob/aec3e59f351cdbafe1260dd65bfb23480918d2df1357b7fd7a9b7a32855e08d9

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.

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