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fastapi-pro — Claude Code skill: what it does, how to install

Guides Claude Code in building async APIs with FastAPI and Pydantic V2. Useful when architecting microservices and structuring database layers.

Install into Claude Code · claude-code-templates All methods and platforms ↓ 
npx claude-code-templates@latest --skill development/fastapi-pro
Open on GitHub

What fastapi-pro does

This skill instructs Claude Code to apply modern Python conventions when building backend services. It prioritizes FastAPI 0.100+ paired with Pydantic V2 and async SQLAlchemy 2.0. The agent structures route parameters with Annotated types and configures connection pools to avoid N+1 query bottlenecks.

Beyond basic REST routes, the skill supports real-time communication via WebSockets. It configures Redis caching alongside background workers like Celery. Production workflows rely on multi-stage Dockerfiles. For monitoring, the setup combines Prometheus metrics with structlog.

Because the skill assumes Pydantic V2 and SQLAlchemy 2.0 async paradigms, applying it to older codebases causes immediate syntax incompatibilities. Detailed architectural patterns also depend on the presence of resources/implementation-playbook.md.

What it helps with

  • architect an async FastAPI service backed by SQLAlchemy 2.0
  • implement JWT authentication with role-based access checks
  • generate multi-stage Dockerfiles and Helm charts for Kubernetes
  • write async integration tests using pytest-asyncio

Example prompts for the agent

  • Build an async FastAPI service with Redis caching and SQLAlchemy 2.0.
  • Implement JWT authentication with refresh token handling.
  • Create a multi-stage Dockerfile and Helm chart for Kubernetes deployment.

How to install fastapi-pro

1claude-code-templates

npx claude-code-templates@latest --skill development/fastapi-pro

2Skills CLI (Vercel)

npx skills add davila7/claude-code-templates --skill fastapi-pro -a claude-code

3Manually: put the files in place

~/.claude/skills/fastapi-pro/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/fastapi-pro/

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about fastapi-pro

How to install fastapi-pro in Claude Code?

Run npx claude-code-templates@latest --skill development/fastapi-pro in your terminal. This command downloads and enables the skill for Claude Code.

What does the fastapi-pro skill do?

It directs Claude Code to produce async-first FastAPI services, enforcing Pydantic V2 data contracts, SQLAlchemy 2.0 session handling, and pytest-asyncio test suites.

Can fastapi-pro be used with Pydantic V1?

The skill specifically targets Pydantic V2 and FastAPI 0.100+. Using it on legacy Pydantic V1 projects will introduce syntax mismatches and schema errors.

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