fix(notifications): complete severity cleanup to 3-level system

- Replace 11 info fallbacks with routine in router.py + channels.py
- Replace 2 warning min_severity defaults with priority
- Update config.example.yaml rules to use routine/priority/immediate
- Annotate config.example.yaml notifications section as transitional pending v0.3 8-toggle rewrite Phase 1.2

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

meshai/config.py

@@ -578,7 +578,7 @@ def _migrate_legacy_channels(notifications, data: dict):
                 enabled=ch.get("enabled", True),
                 trigger_type="condition",
                 categories=old_rule.get("categories", []),
-                min_severity=old_rule.get("min_severity", "warning"),
+                min_severity=old_rule.get("min_severity", "priority"),
                 delivery_type=ch.get("type", "mesh_broadcast"),
                 broadcast_channel=ch.get("channel_index", 0),
                 node_ids=ch.get("node_ids", []),

meshai/notifications/channels.py

@@ -292,7 +292,7 @@ class EmailChannel(NotificationChannel):
             return False
 
         alert_type = alert.get("type", "alert")
-        severity = alert.get("severity", "info").upper()
+        severity = alert.get("severity", "routine").upper()
         message = alert.get("message", "")
         subject = "[MeshAI %s] %s" % (severity, alert_type.replace("_", " ").title())
         body = "MeshAI Alert\n\nType: %s\nSeverity: %s\nTime: %s\n\n%s\n\n---\nAutomated message from MeshAI." % (
@@ -518,7 +518,7 @@ class WebhookChannel(NotificationChannel):
         """POST alert to webhook URL."""
         payload = {
             "type": alert.get("type"),
-            "severity": alert.get("severity", "info"),
+            "severity": alert.get("severity", "routine"),
             "message": alert.get("message", ""),
             "timestamp": time.time(),
             "node_name": alert.get("node_name"),
@@ -527,7 +527,7 @@ class WebhookChannel(NotificationChannel):
 
         # Discord/Slack format
         if "discord.com" in self._url or "slack.com" in self._url:
-            severity = alert.get("severity", "info")
+            severity = alert.get("severity", "routine")
             color = {
                 "immediate": 0xFF0000,
                 "priority": 0xFFAA00,
@@ -669,7 +669,7 @@ class WebhookChannel(NotificationChannel):
         else:
             payload = {
                 "type": "test",
-                "severity": "info",
+                "severity": "routine",
                 "message": "MeshAI channel connectivity test",
                 "timestamp": time.time(),
             }
@@ -730,7 +730,7 @@ class WebhookChannel(NotificationChannel):
     async def deliver_test(self, message: str) -> tuple[bool, str]:
         """Deliver a specific test message via webhook."""
         try:
-            test_alert = {"type": "test", "severity": "info", "message": message}
+            test_alert = {"type": "test", "severity": "routine", "message": message}
             success = await self.deliver(test_alert, {})
             if success:
                 try:

meshai/notifications/router.py

@@ -150,7 +150,7 @@ class NotificationRouter:
     async def process_alert(self, alert: dict) -> bool:
         """Route an alert through matching rules."""
         category = alert.get("type", "")
-        severity = alert.get("severity", "info")
+        severity = alert.get("severity", "routine")
         delivered = False
 
         for rule in self._rules:
@@ -160,7 +160,7 @@ class NotificationRouter:
             if rule_categories and category not in rule_categories:
                 continue
 
-            min_severity = rule.get("min_severity", "info")
+            min_severity = rule.get("min_severity", "routine")
             if not self._severity_meets(severity, min_severity):
                 continue
 
@@ -392,7 +392,7 @@ class NotificationRouter:
 
         rule_name = rule_dict.get("name", f"Rule {rule_index}")
         rule_categories = rule_dict.get("categories", [])
-        min_severity = rule_dict.get("min_severity", "info")
+        min_severity = rule_dict.get("min_severity", "routine")
         delivery_type = rule_dict.get("delivery_type", "")
 
         # Legacy support
@@ -536,7 +536,7 @@ class NotificationRouter:
                 for alert in alert_engine.get_pending_alerts():
                     all_events.append({
                         "type": alert.get("type", ""),
-                        "severity": alert.get("severity", "info"),
+                        "severity": alert.get("severity", "routine"),
                         "message": alert.get("message", ""),
                         "headline": alert.get("message", "")[:80],
                     })
@@ -548,7 +548,7 @@ class NotificationRouter:
                 for event in env_store.get_active():
                     all_events.append({
                         "type": event.get("type", event.get("category", "")),
-                        "severity": event.get("severity", "info"),
+                        "severity": event.get("severity", "routine"),
                         "message": event.get("message", event.get("headline", str(event))),
                         "headline": event.get("headline", event.get("message", "Event"))[:80],
                     })
@@ -761,7 +761,7 @@ class NotificationRouter:
             "enabled": True,
             "trigger_type": "condition",
             "categories": categories if categories else [],
-            "min_severity": "warning",
+            "min_severity": "priority",
             "delivery_type": "mesh_dm",
             "node_ids": [node_id],
             "cooldown_minutes": 10,