api-changelog-versioning

# API Changelog & Versioning Document API changes with clear migration paths and deprecation timelines. ## Changelog Structure ```markdown # API Changelog ## v3.0.0 (2025-01-15) - Breaking Changes ### Breaking Changes - Response format now follows JSON:API specification - Authentication switched from API tokens to JWT Bearer ### Migration Steps 1. Update base URL to `/api/v3` 2. Replace `Authorization: Token xxx` with `Authorization: Bearer xxx` 3. Update response parsing for new envelope format ## v2.5.0 (2024-12-01) - Features ### New Features - Webhook support for order events - Batch operations endpoint - Field filtering via `?fields=` parameter ### Improvements - 56% faster response times on /products - Enhanced error messages with field-specific suggestions ``` ## Deprecation Schedule | Version | Status | Support Until | |---------|--------|---------------| | v3.x | Current | Full support | | v2.x | Maintenance | 2025-06-01 | | v1.x | EOL | Unsupported | ## Version Support Policy - **Current**: Full support, new features - **Maintenance**: Bug fixes and security only - **EOL**: No support, remove from docs ## Migration Guide Template ```markdown ## Migrating from v2 to v3 ### Before (v2) ```json { "user_name": "john" } ``` ### After (v3) ```json { "data": { "type": "user", "attributes": { "name": "john" } } } ``` ### Steps 1. Update SDK to v3.x 2. Modify response handlers 3. Test in staging environment 4. Update production ``` ## Best Practices - Pro...