# ADR 0003: Authentica As Primary OTP Provider

## Status
Accepted

## Context
MVP auth is phone-first; production OTP delivery needed for KSA.

## Decision
Use Authentica as production OTP provider. Keep `console` provider for local development/tests.

## Consequences
- Production auth depends on Authentica credentials + uptime.
- Local development remains simple.
- Adding backup provider needs new adapter + runbook updates.

## Alternatives Considered
- Console-only: not viable for production.
- Multi-provider from day one: deferred for scope control.

## Related
- `backend/apps/accounts/services/otp.py`
- `backend/salon_api/settings.py`
- `docs/runbooks/auth_otp_failures.md`