Phase 1 Streams B–E scaffold + Phase 2 Streams A–C scaffold — 8 new projects with ~70 new tests, all green alongside the 494 v1 IntegrationTests baseline (parity preserved: no v1 tests broken; legacy OtOpcUa.Host untouched). Phase 1 finish: Configuration project (16 entities + 10 enums + DbContext + DesignTimeDbContextFactory + InitialSchema/StoredProcedures/AuthorizationGrants migrations — 8 procs including sp_PublishGeneration with MERGE on ExternalIdReservation per decision #124, sp_RollbackToGeneration cloning rows into a new published generation, sp_ValidateDraft with cross-cluster-namespace + EquipmentUuid-immutability + ZTag/SAPID reservation pre-flight, sp_ComputeGenerationDiff with CHECKSUM-based row signature — plus OtOpcUaNode/OtOpcUaAdmin SQL roles with EXECUTE grants scoped to per-principal-class proc sets and DENY UPDATE/DELETE/INSERT/SELECT on dbo schema); managed DraftValidator covering UNS segment regex, path length, EquipmentUuid immutability across generations, same-cluster namespace binding (decision #122), reservation pre-flight, EquipmentId derivation (decision #125), driver↔namespace compatibility — returning every failing rule in one pass; LiteDB local cache with round-trip + ring pruning + corruption-fast-fail; GenerationApplier with per-entity Added/Removed/Modified diff and dependency-ordered callbacks (namespace → driver → device → equipment → poll-group → tag, Removed before Added); Core project with GenericDriverNodeManager (scaffold for the Phase 2 Galaxy port) and DriverHost lifecycle registry; Server project using Microsoft.Extensions.Hosting BackgroundService replacing TopShelf, with NodeBootstrap that falls back to LiteDB cache when the central DB is unreachable (decision #79); Admin project scaffolded as Blazor Server with Bootstrap 5 sidebar layout, cookie auth, three admin roles (ConfigViewer/ConfigEditor/FleetAdmin), Cluster + Generation services fronting the stored procs. Phase 2 scaffold: Driver.Galaxy.Shared (netstandard2.0) with full MessagePack IPC contract surface — Hello version negotiation, Open/CloseSession, Heartbeat, DiscoverHierarchy + GalaxyObjectInfo/GalaxyAttributeInfo, Read/WriteValues, Subscribe/Unsubscribe/OnDataChange, AlarmSubscribe/Event/Ack, HistoryRead, HostConnectivityStatus, Recycle — plus length-prefixed framing (decision #28) with a 16 MiB cap and thread-safe FrameWriter/FrameReader; Driver.Galaxy.Host (net48) implementing the Tier C cross-cutting protections from driver-stability.md — strict PipeAcl (allow configured server SID only, explicit deny on LocalSystem + Administrators), PipeServer with caller-SID verification via pipe.RunAsClient + WindowsIdentity.GetCurrent and per-process shared-secret Hello, Galaxy-specific MemoryWatchdog (warn at max(1.5×baseline, +200 MB), soft-recycle at max(2×baseline, +200 MB), hard ceiling 1.5 GB, slope ≥5 MB/min over 30-min rolling window), RecyclePolicy (1 soft recycle per hour cap + 03:00 local daily scheduled), PostMortemMmf (1000-entry ring buffer in %ProgramData%\OtOpcUa\driver-postmortem\galaxy.mmf, survives hard crash, readable cross-process), MxAccessHandle : SafeHandle (ReleaseHandle loops Marshal.ReleaseComObject until refcount=0 then calls optional unregister callback), StaPump with responsiveness probe (BlockingCollection dispatcher for Phase 1 — real Win32 GetMessage/DispatchMessage pump slots in with the same semantics when the Galaxy code lift happens), IsExternalInit shim for init setters on .NET 4.8; Driver.Galaxy.Proxy (net10) implementing IDriver + ITagDiscovery forwarding over the IPC channel with MX data-type and security-classification mapping, plus Supervisor pieces — Backoff (5s → 15s → 60s capped, reset-on-stable-run), CircuitBreaker (3 crashes per 5 min opens; 1h → 4h → manual cooldown escalation; sticky alert doesn't auto-clear), HeartbeatMonitor (2s cadence, 3 consecutive misses = host dead per driver-stability.md). Infrastructure: docker SQL Server remapped to host port 14330 to coexist with the native MSSQL14 Galaxy ZB DB instance on 1433; NuGetAuditSuppress applied per-project for two System.Security.Cryptography.Xml advisories that only reach via EF Core Design with PrivateAssets=all (fix ships in 11.0.0-preview); .slnx gains 14 project registrations. Deferred with explicit TODOs in docs/v2/implementation/phase-2-partial-exit-evidence.md: Phase 1 Stream E Admin UI pages (Generations listing + draft-diff-publish, Equipment CRUD with OPC 40010 fields, UNS Areas/Lines tabs, ACLs + permission simulator, Generic JSON config editor, SignalR real-time, Release-Reservation + Merge-Equipment workflows, LDAP login page, AppServer smoke test per decision #142), Phase 2 Stream D (Galaxy MXAccess code lift out of legacy OtOpcUa.Host, dual-service installer, appsettings → DriverConfig migration script, legacy Host deletion — blocked by parity), Phase 2 Stream E (v1 IntegrationTests against v2 topology, Client.CLI walkthrough diff, four 2026-04-13 stability findings regression tests, adversarial review — requires live MXAccess runtime).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.OtOpcUa.Configuration/Entities/Equipment.cs

@@ -0,0 +1,64 @@
+namespace ZB.MOM.WW.OtOpcUa.Configuration.Entities;
+
+/// <summary>
+///     UNS level-5 entity. Only for drivers in Equipment-kind namespaces.
+///     Per decisions #109 (first-class), #116 (5-identifier model), #125 (system-generated EquipmentId),
+///     #138–139 (OPC 40010 Identification fields as first-class columns).
+/// </summary>
+public sealed class Equipment
+{
+    public Guid EquipmentRowId { get; set; }
+
+    public long GenerationId { get; set; }
+
+    /// <summary>
+    ///     System-generated stable internal logical ID. Format: <c>'EQ-' + first 12 hex chars of EquipmentUuid</c>.
+    ///     NEVER operator-supplied, NEVER in CSV imports, NEVER editable in Admin UI (decision #125).
+    /// </summary>
+    public required string EquipmentId { get; set; }
+
+    /// <summary>UUIDv4, IMMUTABLE across all generations of the same EquipmentId. Downstream-consumer join key.</summary>
+    public Guid EquipmentUuid { get; set; }
+
+    /// <summary>Logical FK to the driver providing data for this equipment.</summary>
+    public required string DriverInstanceId { get; set; }
+
+    /// <summary>Optional logical FK to a multi-device driver's device.</summary>
+    public string? DeviceId { get; set; }
+
+    /// <summary>Logical FK to <see cref="UnsLine.UnsLineId"/>.</summary>
+    public required string UnsLineId { get; set; }
+
+    /// <summary>UNS level 5 segment, matches <c>^[a-z0-9-]{1,32}$</c>.</summary>
+    public required string Name { get; set; }
+
+    // Operator-facing / external-system identifiers (decision #116)
+
+    /// <summary>Operator colloquial id (e.g. "machine_001"). Unique within cluster. Required.</summary>
+    public required string MachineCode { get; set; }
+
+    /// <summary>ERP equipment id. Unique fleet-wide via <see cref="ExternalIdReservation"/>. Primary browse identifier in Admin UI.</summary>
+    public string? ZTag { get; set; }
+
+    /// <summary>SAP PM equipment id. Unique fleet-wide via <see cref="ExternalIdReservation"/>.</summary>
+    public string? SAPID { get; set; }
+
+    // OPC UA Companion Spec OPC 40010 Machinery Identification fields (decision #139).
+    // All nullable so equipment can be added before identity is fully captured.
+    public string? Manufacturer { get; set; }
+    public string? Model { get; set; }
+    public string? SerialNumber { get; set; }
+    public string? HardwareRevision { get; set; }
+    public string? SoftwareRevision { get; set; }
+    public short? YearOfConstruction { get; set; }
+    public string? AssetLocation { get; set; }
+    public string? ManufacturerUri { get; set; }
+    public string? DeviceManualUri { get; set; }
+
+    /// <summary>Nullable hook for future schemas-repo template ID (decision #112).</summary>
+    public string? EquipmentClassRef { get; set; }
+
+    public bool Enabled { get; set; } = true;
+
+    public ConfigGeneration? Generation { get; set; }
+}