Python FastAPI Development

Overview

Specialized workflow for building production-ready Python backends with FastAPI, featuring async patterns, SQLAlchemy ORM, Pydantic validation, and comprehensive API patterns.

When to Use This Workflow

Use this workflow when:

• -Building new REST APIs with FastAPI
• -Creating async Python backends
• -Implementing database integration with SQLAlchemy
• -Setting up API authentication
• -Developing microservices

Workflow Phases

Phase 1: Project Setup

#### Skills to Invoke

• -app-builder - Application scaffolding
• -python-development-python-scaffold - Python scaffolding
• -fastapi-templates - FastAPI templates
• -uv-package-manager - Package management

#### Actions

1. Set up Python environment (uv/poetry)

2. Create project structure

3. Configure FastAPI app

4. Set up logging

5. Configure environment variables

#### Copy-Paste Prompts

Use @fastapi-templates to scaffold a new FastAPI project

Use @python-development-python-scaffold to set up Python project structure

Phase 2: Database Setup

#### Skills to Invoke

• -prisma-expert - Prisma ORM (alternative)
• -database-design - Schema design
• -postgresql - PostgreSQL setup
• -pydantic-models-py - Pydantic models

#### Actions

1. Design database schema

2. Set up SQLAlchemy models

3. Create database connection

4. Configure migrations (Alembic)

5. Set up session management

#### Copy-Paste Prompts

Use @database-design to design PostgreSQL schema

Use @pydantic-models-py to create Pydantic models for API

Phase 3: API Routes

#### Skills to Invoke

• -fastapi-router-py - FastAPI routers
• -api-design-principles - API design
• -api-patterns - API patterns

#### Actions

1. Design API endpoints

2. Create API routers

3. Implement CRUD operations

4. Add request validation

5. Configure response models

#### Copy-Paste Prompts

Use @fastapi-router-py to create API endpoints with CRUD operations

Use @api-design-principles to design RESTful API

Phase 4: Authentication

#### Skills to Invoke

• -auth-implementation-patterns - Authentication
• -api-security-best-practices - API security

#### Actions

1. Choose auth strategy (JWT, OAuth2)

2. Implement user registration

3. Set up login endpoints

4. Create auth middleware

5. Add password hashing

#### Copy-Paste Prompts

Use @auth-implementation-patterns to implement JWT authentication

Phase 5: Error Handling

#### Skills to Invoke

• -fastapi-pro - FastAPI patterns
• -error-handling-patterns - Error handling

#### Actions

1. Create custom exceptions

2. Set up exception handlers

3. Implement error responses

4. Add request logging

5. Configure error tracking

#### Copy-Paste Prompts

Use @fastapi-pro to implement comprehensive error handling

Phase 6: Testing

#### Skills to Invoke

• -python-testing-patterns - pytest testing
• -api-testing-observability-api-mock - API testing

#### Actions

1. Set up pytest

2. Create test fixtures

3. Write unit tests

4. Implement integration tests

5. Configure test database

#### Copy-Paste Prompts

Use @python-testing-patterns to write pytest tests for FastAPI

Phase 7: Documentation

#### Skills to Invoke

• -api-documenter - API documentation
• -openapi-spec-generation - OpenAPI specs

#### Actions

1. Configure OpenAPI schema

2. Add endpoint documentation

3. Create usage examples

4. Set up API versioning

5. Generate API docs

#### Copy-Paste Prompts

Use @api-documenter to generate comprehensive API documentation

Phase 8: Deployment

#### Skills to Invoke

• -deployment-engineer - Deployment
• -docker-expert - Containerization

#### Actions

1. Create Dockerfile

2. Set up docker-compose

3. Configure production settings

4. Set up reverse proxy

5. Deploy to cloud

#### Copy-Paste Prompts

Use @docker-expert to containerize FastAPI application

Technology Stack

Quality Gates

• -[ ] All tests passing (>80% coverage)
• -[ ] Type checking passes (mypy)
• -[ ] Linting clean (ruff, black)
• -[ ] API documentation complete
• -[ ] Security scan passed
• -[ ] Performance benchmarks met

Related Workflow Bundles

• -development - General development
• -database - Database operations
• -security-audit - Security testing
• -api-development - API patterns