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+---
+name: "Pipeline stage notifications for WhatsApp and Slack transports"
+---
+
+# Story 393: Pipeline stage notifications for WhatsApp and Slack transports
+
+## User Story
+
+As a WhatsApp or Slack user, I want to receive pipeline stage transition notifications (e.g. "story moved from Current to QA") just like Matrix users do, so I can track story progress from any transport.
+
+## Acceptance Criteria
+
+- [ ] WhatsApp transport spawns a notification listener at startup using the existing spawn_notification_listener infrastructure
+- [ ] Slack transport spawns a notification listener at startup using the same infrastructure
+- [ ] Notifications are sent to all active ambient senders/channels for the respective transport
+- [ ] Stage transition notifications (story moved between pipeline stages) are delivered
+- [ ] Error notifications (story failures) are delivered
+- [ ] Rate limit warnings are delivered with debouncing
+- [ ] Matrix notification behavior is completely unaffected
+
+## Out of Scope
+
+- TBD