Which API versioning strategy is recommended?

URL path versioning (e.g., /api/v1/) is generally recommended by this skill for its simplicity, visibility, and ease of caching.

How does this skill help with breaking changes?

It provides a clear checklist to distinguish between non-breaking changes (like adding optional fields) and breaking changes that require a new version bump.

Can I use these patterns with frameworks other than FastAPI?

Yes. While the code examples focus on FastAPI, the architectural principles and HTTP header strategies are applicable to any RESTful framework like Express, Django, or Go.

What are Sunset and Deprecation headers?

They are standardized HTTP headers that communicate to clients exactly when an API version is deprecated and the specific date it will be taken offline (sunset).

API Versioning Strategies

Name: API Versioning Strategies
Author: yonatangross

byyonatangross

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API Development

Implements professional REST API versioning strategies and lifecycle policies to ensure backward compatibility and smooth migrations.

About

This skill provides a comprehensive framework for managing the evolution of REST APIs without breaking client integrations. It offers implementation patterns for various versioning methods—including URL paths, custom headers, and content negotiation—specifically tailored for FastAPI and modern backend architectures. By guiding developers through version-specific schemas, deprecation headers, and sunset policies, it ensures that API growth remains manageable, predictable, and developer-friendly.

Key Features

Formal version lifecycle management from alpha to retirement
Standardized URL path, header, and content negotiation patterns
Version-specific FastAPI route and schema implementation guides
29 GitHub stars
Automated deprecation and sunset header management
Clear criteria for breaking vs. non-breaking change identification

Use Cases

Establishing a standardized sunset policy for legacy microservices
Migrating a production API from v1 to v2 without disrupting existing users
Architecting a multi-version router system using FastAPI dependency injection

About

Key Features

Formal version lifecycle management from alpha to retirement
Standardized URL path, header, and content negotiation patterns
Version-specific FastAPI route and schema implementation guides
29 GitHub stars
Automated deprecation and sunset header management
Clear criteria for breaking vs. non-breaking change identification

Use Cases

Establishing a standardized sunset policy for legacy microservices
Migrating a production API from v1 to v2 without disrupting existing users
Architecting a multi-version router system using FastAPI dependency injection