# Backend API Guides

## Use this for current frontend work

- [V2 Backend API Guide](./V2/README.md)
- [V2 Core API](./V2/core-api.md)
- [V2 Command API](./V2/command-api.md)
- [V2 Query API](./V2/query-api.md)

## Legacy reference

- [Initial API contracts](./00-initial-api-contracts.md)

The legacy contract doc reflects the older Data Connect-oriented application shape. Do not use it as the source of truth for new v2 frontend work.