docs(plans): Lever 1 live gate PASS on the docker rig (one request per 45 s ceiling, backoff 5→9.4→20.4 s, Good within ~95 s of restore); plan tasks 1-8 completed

Claude-Session: https://claude.ai/code/session_019ZxXT5sxZs5XrtdwYzJDPV

docs/plans/2026-08-28-mxgateway-subscribe-storm-prevention-design.md

@@ -59,6 +59,9 @@ Levers 1 and 2 are each sufficient to break the feedback loop; together they are
 
 **Invariants preserved:** a superseded correlation id is still ignored (`HandleSubscribeTagsResponse` :1262-1264 stale-reply drop); a `Success` still cancels the timer (:1269) and resets backoff; `PostStop` still cancels all timers (`:391-394`).
 
+
+> **Live gate PASS 2026-08-28 (docker rig, main @ 0589486f).** OPC UA sim stopped and the instance's site node restarted so the boot-time subscribe could not be answered (failover landed `rig-probe-1` on site-a-b): the log shows exactly **one** outstanding `SubscribeTagsRequest` per in-flight ceiling — `unanswered for 45091ms … presuming lost, re-sending`, then `47130ms` — with the backoff climbing `next retry in 00:00:05 → 00:00:09.415 → 00:00:20.369` (jittered), i.e. 3 requests in ~110 s where the pre-Lever-1 actor would have issued ~22. Sim restarted → DCL `Entering Connected state` in 4 s → all three attributes `Good` with fresh timestamps within ~95 s (`debug snapshot --id 1492`). Steady state on a healthy node: one `subscribing` line per (instance, connection), no `still in flight` / `presuming lost` at all. Note for future gates: an OPC UA outage *alone* never reaches this path — the DCL reconnects and re-subscribes transparently and the Instance Actor's subscribe stays confirmed; you must make the subscribe itself go unanswered (node restart / redeploy while the source is down).
+
 ---
 
 ## 4. Lever 2 — bulk supervisory-advise RPC (capability-negotiated)

docs/plans/2026-08-28-tag-subscribe-inflight-guard-backoff.md.tasks.json

@@ -1,14 +1,66 @@
 {
   "planPath": "docs/plans/2026-08-28-tag-subscribe-inflight-guard-backoff.md",
   "tasks": [
-    {"id": 1, "subject": "Task 1: Options + validator (new keys)", "status": "pending"},
-    {"id": 2, "subject": "Task 2: Pure backoff step NextTagSubscribeInterval", "status": "pending"},
-    {"id": 3, "subject": "Task 3: In-flight guard", "status": "pending", "blockedBy": [1, 2]},
-    {"id": 4, "subject": "Task 4: Failure reply frees slot, backs off, Success resets", "status": "pending", "blockedBy": [3]},
-    {"id": 5, "subject": "Task 5: Superseded-reply lock-in test", "status": "pending", "blockedBy": [4]},
-    {"id": 6, "subject": "Task 6: ConnectionQualityChanged(Good) resets backoff", "status": "pending", "blockedBy": [4]},
-    {"id": 7, "subject": "Task 7: Spec + CLAUDE.md + design-doc status", "status": "pending", "blockedBy": [5, 6]},
-    {"id": 8, "subject": "Task 8: Rig redeploy + live gate", "status": "pending", "blockedBy": [7]}
+    {
+      "id": 1,
+      "subject": "Task 1: Options + validator (new keys)",
+      "status": "completed"
+    },
+    {
+      "id": 2,
+      "subject": "Task 2: Pure backoff step NextTagSubscribeInterval",
+      "status": "completed"
+    },
+    {
+      "id": 3,
+      "subject": "Task 3: In-flight guard",
+      "status": "completed",
+      "blockedBy": [
+        1,
+        2
+      ]
+    },
+    {
+      "id": 4,
+      "subject": "Task 4: Failure reply frees slot, backs off, Success resets",
+      "status": "completed",
+      "blockedBy": [
+        3
+      ]
+    },
+    {
+      "id": 5,
+      "subject": "Task 5: Superseded-reply lock-in test",
+      "status": "completed",
+      "blockedBy": [
+        4
+      ]
+    },
+    {
+      "id": 6,
+      "subject": "Task 6: ConnectionQualityChanged(Good) resets backoff",
+      "status": "completed",
+      "blockedBy": [
+        4
+      ]
+    },
+    {
+      "id": 7,
+      "subject": "Task 7: Spec + CLAUDE.md + design-doc status",
+      "status": "completed",
+      "blockedBy": [
+        5,
+        6
+      ]
+    },
+    {
+      "id": 8,
+      "subject": "Task 8: Rig redeploy + live gate",
+      "status": "completed",
+      "blockedBy": [
+        7
+      ]
+    }
   ],
-  "lastUpdated": "2026-08-28T18:00:00Z"
-}
+  "lastUpdated": "2026-08-28T19:06:22Z"
+}