M1 — over-the-wire event-delivery proof (new NativeAlarmMultiNotifierEventDeliveryTests
in OpcUaServer.IntegrationTests): boots the real server, wires one condition to two
equipment folders, fires ONE transition, and asserts a Server-object subscriber gets
EXACTLY ONE event (the shared-InstanceStateSnapshot queue dedup), plus overlapping
Server + equipment-folder subscribers each get exactly one copy. Captures via the
subscription FastEventCallback keyed by ClientHandle (the per-item Notification/DequeueEvents
path delivers nothing for these conditions in the SDK client — the working capture is the
fast callback).
M2 — resolution-failure signal + path-agreement tripwire (AddressSpaceApplier): when a
native alarm HAS ReferencingEquipmentPaths but NONE resolve to an equipment folder, count
it as a failed node (degraded-apply meter) + LogWarning instead of a silent skip; documented
the DisplayName==Name coupling as a binding invariant. Tests:
Composer_referencing_equipment_paths_resolve_back_to_equipment_ids_in_the_applier (real
composer output → applier inversion) + ..._unresolvable_referencing_equipment_counts_as_failed.
M3 — WireAlarmNotifiers is now a RECONCILE (unwires a folder dropped from the supplied set,
bidirectionally) so a future surgical ChangedRawTags path can't leave a de-referenced
equipment receiving the alarm; binding guard comment added on the classifier's
ChangedRawTags→Rebuild branch. Test: WireAlarmNotifiers_reconciles_a_dropped_folder_out_of_the_notifier_set.
L1 — MaterialiseAlarmCondition's kind-swap drop-and-recreate now calls
UnwireAlarmNotifiers(conditionKey) before discarding the old instance (teardown symmetry).
L3 — BuildEquipmentIdByFolderPath LogWarnings on a duplicate Area/Line/Name collision
(defense-in-depth; UNS uniqueness prevents it).
Claude-Session: https://claude.ai/code/session_01LVneM3eh1UtJxEisFXgmox
Materialize each native alarm ONCE at the raw tag (ConditionId = RawPath, Raw
realm); wire the single condition as an SDK event notifier of each referencing
equipment's UNS folder so one ReportEvent fans to every root without
re-reporting per root (which would break Server-object dedup + Part 9 ack
correlation).
- New sink method WireAlarmNotifiers(alarmNodeId, alarmRealm,
notifierFolderNodeIds, notifierFolderRealm) on IOpcUaAddressSpaceSink,
forwarded through DeferredAddressSpaceSink + SdkAddressSpaceSink +
NullOpcUaAddressSpaceSink (the forwarding-trap guard); auto-covered by the
DeferredSinkForwardingReflectionTests realm + forwarding guards + a
hand-written forward test.
- OtOpcUaNodeManager: the normative AddNotifier(isInverse) pair + idempotent
EnsureFolderIsEventNotifier per equipment folder; tracked per condition in
_alarmNotifierWiring. Teardown symmetry: RemoveNotifier(bidirectional:true) on
RebuildAddressSpace, RemoveAlarmConditionNode, and RemoveEquipmentSubtree so no
inverse-notifier entry leaks across redeploys.
- AddressSpaceApplier.MaterialiseRawSubtree wires notifiers for each native alarm
tag, resolving its ReferencingEquipmentPaths (Area/Line/Equipment) to the
EquipmentId folder NodeIds via BuildEquipmentIdByFolderPath.
- AlarmTransitionEvent gains ReferencingEquipmentPaths (empty default); /alerts
renders the referencing-equipment list as display metadata.
- Un-skipped + rewrote the native-alarm dark tests
(DriverHostActorNativeAlarmTests x6, DriverHostActorNativeAlarmAckRoutingTests
x1) for the v3 raw-condition model; new NodeManagerMultiNotifierAlarmTests
proves multi-notifier wiring + teardown symmetry (no leaked duplicates after a
re-trip) + applier wiring test.
Claude-Session: https://claude.ai/code/session_01LVneM3eh1UtJxEisFXgmox
Wave B of Batch 4 — the runtime binding seam for the dual namespace.
Applier (both realms, explicit realm at every sink call site):
- MaterialiseRawSubtree: Raw containers as folders + Raw tags as variables
keyed by RawPath (native-alarm tag → single Part 9 condition at the RawPath),
all in AddressSpaceRealm.Raw; historian tagname = override else RawPath.
- MaterialiseUnsReferences: each UNS reference Variable under its equipment
folder (Uns realm) + an Organizes UNS->Raw edge; inherits writable/array/
historian tagname from the backing raw tag (both NodeIds -> one tagname).
- FeedHistorizedRefs / ProvisionHistorizedTags now source RAW tags (mux ref
stays single, keyed by RawPath); ApplyPureRemove tears down raw tags + UNS
refs in place (raw-container removal falls back to rebuild).
DriverHostActor (dual-NodeId, single-source fan-out):
- _nodeIdByDriverRef value gains a realm (NodeRealmRef); rebuilt from
RawTags UNION UnsReferenceVariables so one (DriverInstanceId, RawPath) fans
to the raw NodeId AND every referencing UNS NodeId with identical
value/quality/timestamp. Write inverse map keyed by the bare id; the
ns-qualified NodeId the write hook passes is normalised (BareNodeId) so a
write to either NodeId resolves the same driver ref (-> RawPath write).
- Native raw alarm condition routing is realm-tagged (Raw); AttributeValueUpdate
+ AlarmStateUpdate carry the realm through to the sink.
Retire EquipmentNodeIds -> V3NodeIds.Uns (applier/VirtualTagHostActor) and
RawPaths.Combine (DiscoveredNodeMapper, discovered nodes are Raw now).
DeploymentArtifact.ParseComposition emits the Raw + UNS subtrees byte-parity
with the composer (reconstruct entities -> AddressSpaceComposer.Compose).
Sink surface: removed the transitional `= AddressSpaceRealm.Uns` defaults from
IOpcUaAddressSpaceSink / ISurgicalAddressSpaceSink / SdkAddressSpaceSink /
DeferredAddressSpaceSink / NullOpcUaAddressSpaceSink — every call site is now
explicit (realm reordered before the trailing optionals on EnsureVariable +
MaterialiseAlarmCondition). Node-manager convenience methods keep their
defaults (they are not the interface impl; Sdk delegates explicitly).
Tests: rewrote DriverHostActorLiveValueTests (fan-out drift, 1:N) +
DriverHostActorWriteRoutingTests (dual-NodeId raw/uns write routing) to the v3
raw+uns model; new AddressSpaceApplierRawUnsTests; migrated the EquipmentTags
provisioning/feed tests to RawTags; swept EquipmentNodeIds test callers.
Claude-Session: https://claude.ai/code/session_01LVneM3eh1UtJxEisFXgmox
Joseph Doherty