diff --git a/archreview/plans/PLAN-04-data-audit-backbone.md.tasks.json b/archreview/plans/PLAN-04-data-audit-backbone.md.tasks.json
index 8830c2fc..b2232dcf 100644
--- a/archreview/plans/PLAN-04-data-audit-backbone.md.tasks.json
+++ b/archreview/plans/PLAN-04-data-audit-backbone.md.tasks.json
@@ -4,9 +4,9 @@
     { "id": 1, "subject": "Task 1: Site SQLite retention purge — PurgeExpiredAsync on the writer", "status": "completed", "blockedBy": [] },
     { "id": 2, "subject": "Task 2: Site retention options", "status": "completed", "blockedBy": [] },
     { "id": 3, "subject": "Task 3: Site retention hosted job + registration + design doc", "status": "completed", "blockedBy": [1, 2] },
-    { "id": 4, "subject": "Task 4: Maintenance command timeout on partition switch + per-channel purge", "status": "pending", "blockedBy": [] },
-    { "id": 5, "subject": "Task 5: Purge-failure health event (not just a log line)", "status": "pending", "blockedBy": [4] },
-    { "id": 6, "subject": "Task 6: Fix purger role grants (migration)", "status": "pending", "blockedBy": [] },
+    { "id": 4, "subject": "Task 4: Maintenance command timeout on partition switch + per-channel purge", "status": "completed", "blockedBy": [] },
+    { "id": 5, "subject": "Task 5: Purge-failure health event (not just a log line)", "status": "completed", "blockedBy": [4] },
+    { "id": 6, "subject": "Task 6: Fix purger role grants (migration)", "status": "completed", "blockedBy": [] },
     { "id": 7, "subject": "Task 7: Honest append-only enforcement story (docs)", "status": "pending", "blockedBy": [6] },
     { "id": 8, "subject": "Task 8: SiteCalls filtered non-terminal index (migration)", "status": "pending", "blockedBy": [6] },
     { "id": 9, "subject": "Task 9: Bound the execution-tree edge scan with a root time window", "status": "pending", "blockedBy": [] },
@@ -28,5 +28,5 @@
     { "id": 25, "subject": "Task 25: Bounded parallel notification delivery", "status": "pending", "blockedBy": [13] },
     { "id": 26, "subject": "Final verification: full solution build + test sweep (infra up for MSSQL suites)", "status": "pending", "blockedBy": [3, 8, 9, 10, 12, 14, 18, 19, 20, 21, 22, 23, 24, 25] }
   ],
-  "lastUpdated": "2026-07-09"
+  "lastUpdated": "2026-07-09 (Batch 2: Tasks 4-6 completed)"
 }