# ADR 004: Select SMS Providers With Strategy

## Status

Accepted.

## Context

The project supports Kavenegar, SMS.ir, and local debug delivery.

## Decision

Expose a stable `SmsClient` port and choose the concrete provider through a small factory based on `SMS_PROVIDER`.

## Consequences

Adding a new SMS provider does not change the auth use case or worker flow. Tests can mock providers without network access.