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docs/modules/notifier/README.md

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+# Notifier (Notifications Studio Host)
+
+**Status:** Implemented
+**Source:** `src/Notifier/`
+**Owner:** Notify Guild
+
+> **Note:** Notifier is the **deployment host** for the Notifications Studio. For the underlying notification toolkit (engine, storage, queue, connectors), see [`../notify/`](../notify/).
+
+## Purpose
+
+Notifier provides the deployable WebService and Worker that compose the Notify libraries into the Notifications Studio experience. It's the entry point for notification delivery, rule management, and delivery history.
+
+## Relationship to Notify
+
+| Component | Path | Purpose |
+|-----------|------|---------|
+| **Notify** | `src/Notify/` | Reusable toolkit: engine, models, connectors, queue |
+| **Notifier** | `src/Notifier/` | Host: WebService and Worker that compose Notify |
+
+Per **2025-11-02 module boundary decision**: Maintain separation for packaging, offline kit parity, and cross-module governance.
+
+## Components
+
+**Deployables:**
+- `StellaOps.Notifier.WebService` - REST API for rules/channels CRUD, test send, delivery browsing
+- `StellaOps.Notifier.Worker` - Event consumers, evaluators, renderers, delivery workers
+
+**Integration Points:**
+- Uses `StellaOps.Notify.Models`, `StellaOps.Notify.Queue`
+- Channels: Slack, Teams, Email, Webhook (via Notify connectors)
+- Storage: PostgreSQL (notify schema)
+- Queue: Valkey Streams / NATS JetStream
+
+## Related Documentation
+
+- Notify Architecture: `../notify/architecture.md`
+- Authority: `../authority/` (OAuth clients)
+- Scheduler: `../scheduler/` (event sources)