Gap: API Versioning Strategy

Status: 🔴 Not Started Priority: Important (Pre-Scale) Estimated Effort: 1 day

What's Missing

API versioning and evolution strategy including:

• Versioning Approach

  • URL-based (/v1/, /v2/) vs. header-based
  • Version number scheme
  • When to increment version
  • Backward compatibility policy

• Breaking Changes

  • What constitutes a breaking change
  • Deprecation timeline (e.g., 6 months notice)
  • How to communicate breaking changes
  • Migration guides for clients

• Version Sunset

  • How long to support old versions
  • Deprecation warnings in responses
  • Forced migration timeline
  • Customer communication plan

• Non-Breaking Changes

  • Adding new endpoints
  • Adding optional fields
  • Adding enum values
  • Documentation versioning

Why Important

1. Client Stability - Frontends need stable APIs
2. Evolution - Must be able to improve API over time
3. Multi-Client Support - Different clients on different versions
4. Clear Contracts - Clients know what to expect

Current State

• API uses /v1/ prefix
• No versioning policy documented
• No deprecation process

Recommended Location

docs/api/versioning.md

Success Criteria

• [ ] Versioning approach documented
• [ ] Breaking change policy defined
• [ ] Deprecation timeline established
• [ ] Communication process defined