diff --git a/machine-docs/REVIEW-regall.md b/machine-docs/REVIEW-regall.md
index 6991880..0ee1453 100644
--- a/machine-docs/REVIEW-regall.md
+++ b/machine-docs/REVIEW-regall.md
@@ -122,3 +122,12 @@ Cold-read Drone logs for custom-html (build 737):
 - No `previous/` overlay applied — correct, custom-html has no `UPGRADE_BASE_VERSION` set ✓
 - `base = main-tip/ref 2b82ebabde74 → chaos deploy of the checked-out ref` ✓
 **PASS: prevb previous/ overlay correctly scoped to UPGRADE_BASE_VERSION recipes only.**
+
+### Batch 4 cold-verified @2026-06-17T03:00Z — all L5, no regressions
+
+From Drone builds API + cc-ci run results.json:
+- **lasuite-docs** (run 743, Drone 743, PR#6): level=5, all rungs pass (upgrade=pass, backup_restore=pass) ✓
+- **ghost** (run 744, Drone 744, PR#6): level=5, all rungs pass (upgrade=pass, backup_restore=pass) ✓
+- **immich** (run 745, Drone 745, PR#3): level=5, all rungs pass (upgrade=pass, backup_restore=pass) ✓
+
+No regressions vs baseline in batch 4. Sweep progress: 16/21 recipes GREEN.