# Notification channels

Supported types
- Slack and Teams via webhooks.
- Email via SMTP or relay.
- Generic webhook and escalation webhook.
- Console in-app delivery.

Channel schema (summary)
- id, tenant, type, endpoint, secretRef, labels.
- throttle and quietHours.
- enabled flag and createdUtc timestamp.

Security and determinism
- No secrets stored in Notify DB; use secretRef.
- Endpoints must be allowlisted.
- Webhook payloads use HMAC-SHA256 with nonce and timestamp.
- Deterministic channel ids for manifest-based creation.

Offline posture
- Offline kits include placeholder channel manifests.
- Operators replace endpoints and secretRefs before deployment.

Related references
- docs/notifications/channels.md
- docs/notifications/architecture.md