diff --git a/docs/plans/2026-07-22-clusterclient-to-grpc-plan.md b/docs/plans/2026-07-22-clusterclient-to-grpc-plan.md
index 76be2a6e..ca2e82b0 100644
--- a/docs/plans/2026-07-22-clusterclient-to-grpc-plan.md
+++ b/docs/plans/2026-07-22-clusterclient-to-grpc-plan.md
@@ -318,8 +318,8 @@ Critical path ≈ 1B: **~4–6 weeks total**, matching the design estimate.
 **Phase 1B — site command plane** (worktree, `feat/grpc-sitecommand`)
 - [x] T1B.1 `site_command.proto` (6 oneof RPCs / 28 commands) + `SiteCommandDtoMapper` + round-trip golden tests (all 28 + replies)
 - [x] T1B.2 `SiteCommandDispatcher` refactor (actor + new `SiteCommandGrpcService` share it; parked stays node-local)
-- [ ] T1B.3 `ISiteCommandTransport` in `CentralCommunicationActor` (Akka extract + Grpc impl), `SitePairChannelProvider` (Site entity Grpc columns + DB refresh loop), `SiteTransport` flag default `Akka`
-- [ ] T1B.4 Tests: dispatcher routing ×28, actor envelope/reply plumbing, TestServer service tests, existing Communication suites green
+- [x] T1B.3 `ISiteCommandTransport` in `CentralCommunicationActor` (Akka extract + Grpc impl), `SitePairChannelProvider` (Site entity Grpc columns + DB refresh loop), `SiteTransport` flag default `Akka`
+- [x] T1B.4 Tests: dispatcher routing ×28, actor envelope/reply plumbing, TestServer service tests, existing Communication suites green
 - [ ] 1B DoD: rig central on `Grpc` for site-a proves full command matrix incl. standby parked retry; rebased on 1A; PR merged
 
 **Phase 2 ∥ 3 — cutover + soak**
diff --git a/docs/plans/2026-07-22-clusterclient-to-grpc-plan.md.tasks.json b/docs/plans/2026-07-22-clusterclient-to-grpc-plan.md.tasks.json
index bc3bb5b2..43218e43 100644
--- a/docs/plans/2026-07-22-clusterclient-to-grpc-plan.md.tasks.json
+++ b/docs/plans/2026-07-22-clusterclient-to-grpc-plan.md.tasks.json
@@ -164,22 +164,24 @@
       "id": "T1B.3",
       "phase": "1B",
       "subject": "ISiteCommandTransport in CentralCommunicationActor (Akka extract + Grpc impl), SitePairChannelProvider, SiteTransport flag",
-      "status": "in_progress",
+      "status": "completed",
       "activeForm": "Building the central->site transport seam",
       "blockedBy": [
         "T1B.1"
-      ]
+      ],
+      "notes": "3be85f19 on feat/grpc-sitecommand. ISiteCommandTransport injected into CentralCommunicationActor; HandleSiteEnvelope->_transport.Send(env,Sender), HandleSiteAddressCacheLoaded->_transport.ReconcileSites. AkkaSiteTransport extracted verbatim (incl no-client->drop path). GrpcSiteTransport + SitePairChannelProvider (A/B from GrpcNode*Address, per-site PSK via ISitePskProvider, Invalidate on removal). Rode the EXISTING LoadSiteAddressesFromDb loop (extended SiteAddressCacheLoaded to carry gRPC cols too) - ONE poll loop. Flag SiteTransport default Akka. PLAN CORRECTIONS: (1) LoadSiteAddressesFromDb DOES exist (known); (2) plan deadline table wrong TWICE - DeploymentStateQuery uses QueryTimeout not LifecycleTimeout, TriggerSiteFailover uses QueryTimeout not LifecycleTimeout - resolver is per-command-type not per-group, verified in code; (3) SiteCommandGroup XML doc's 'shared deadline class' claim is false; (4) THIRD SiteEnvelope producer DebugStreamBridgeActor (not just CommunicationService+SiteCallAudit) - reply plumbing routes to a real actor sender, not only Ask temp actors. RetryParkedOperation/DiscardParkedOperation->QueryTimeout(30s) keeps SiteCallAudit RelayTimeout(10s)<30s. Communication.Tests 607, gRPC Host.Tests 34. Existing suites: 1 trivial helper edit (SiteAddressCacheLoaded internal->public + new dict arg)."
     },
     {
       "id": "T1B.4",
       "phase": "1B",
       "subject": "Tests: dispatcher routing x28, actor envelope/reply plumbing, TestServer service tests, existing suites green",
-      "status": "pending",
+      "status": "completed",
       "activeForm": "Testing the site command plane",
       "blockedBy": [
         "T1B.2",
         "T1B.3"
-      ]
+      ],
+      "notes": "Tests shipped inside T1B.1/1B.2/1B.3 per the plan folding T1B.4 into each task. Dispatcher routing x28, actor envelope/reply plumbing, TestServer service tests, deadline theory, failover/failback, existing Communication suites green with Akka default."
     },
     {
       "id": "P1B.DoD",