Changeset 0.28.2 (#183)

docs/ICD/enums.md

@@ -193,9 +193,25 @@ All enum values used across the API. Definitive source of truth.
 
 ## Notification Types
 
-`role.fallback`, `memory.extracted`, `system.announcement`,
-`workflow.assigned`, `workflow.claimed`, `task.completed`,
-`task.failed`, `user.mentioned`
+Convention: `domain.action`. Free-form strings — new types don't
+require migration.
+
+| Type | Description |
+|------|-------------|
+| `role.fallback` | Model role fell back to secondary provider |
+| `kb.ready` | Knowledge base finished indexing |
+| `kb.error` | Knowledge base indexing failed |
+| `grant.changed` | User added to or removed from a group |
+| `memory.extracted` | New memories extracted from conversation |
+| `user.mentioned` | User was @mentioned in a channel |
+| `workflow.assigned` | Workflow stage assigned to team/user |
+| `workflow.claimed` | Workflow assignment claimed by a user |
+| `task.completed` | Scheduled task finished successfully |
+| `task.failed` | Scheduled task failed |
+| `task.budget_exceeded` | Task hit token/tool/wall-clock budget |
+
+**Planned (not yet implemented):**
+`system.announcement` (v0.28.4 — admin broadcast to all users)
 
 ## Git Auth Types