Agent Skills: api-versioning

Comprehensive guide to API versioning strategies, backward compatibility, deprecation, and lifecycle management. Use when user asks about "version API", "API compatibility", "breaking changes", "semantic versioning", "API evolution", "deprecation strategy", "backwards compatibility", "API migration", "version management", "sunset header", "API changelog", "schema versioning", "OpenAPI versioning", "GraphQL versioning", or mentions API lifecycle management, consumer migration, or version negotiation.