The tier system was documented, operator-authorable, and inert. Deleted rather than activated,
because its premise is gone rather than merely unused.
"Tier C" meant a driver running out-of-process behind an IDriverSupervisor that could restart its
Host without tearing down the OPC UA session. No such process exists anywhere: Galaxy reaches
MXAccess over gRPC to the external mxaccessgw sidecar (PR 7.2 retired the in-process
Galaxy.Host/Proxy/Shared projects) and FOCAS has run in-process since its managed wire client
landed 2026-04-24. Consistently, IDriverSupervisor had ZERO implementations and there was nothing
for one to implement against.
The issue understated the inertness. It says the Tier-C-only protections never engaged, implying
the Tier A/B parts did. They did not: nothing constructs MemoryTracking, MemoryRecycle or
ScheduledRecycleScheduler outside their own unit tests, so the whole Core/Stability recycle layer
was dead — meaning option (a), "pass real tiers", was never a flag flip. It would have meant
writing the wiring that never existed AND arming it.
Deleted: MemoryTracking, MemoryRecycle, ScheduledRecycleScheduler, IDriverSupervisor, the
vestigial DriverTypeRegistry (referenced only by its own tests), and the RecycleIntervalSeconds
knob — which the AdminUI let an operator author and the parser validated while it configured
nothing.
DriverTier itself SURVIVES and is load-bearing: DriverResilienceOptions.GetTierDefaults supplies
the real per-capability timeout/retry/breaker policies via DriverFactoryRegistry.GetTier and
DriverCapabilityInvokerFactory. Only the isolation-and-recycle layer above it is gone.
Deliberately NOT deleted:
- WedgeDetector came along in the same directory and is equally dead in production, but it is
tier-agnostic and is not recycle machinery — it only shares the folder. Restored rather than
swept up in a decision that was not about it.
- IDriver.GetMemoryFootprint() and FlushOptionalCachesAsync() lose their only consumer here.
Removing them touches all 12 drivers and every test stub, so they are documented as
consumerless and filed as #525 instead of buried in this diff.
Compatibility: a deployed ResilienceConfig blob still carrying "recycleIntervalSeconds" parses
cleanly (unknown keys are ignored — guarded by a new test, because a blob that suddenly failed to
parse would fall back to tier defaults and silently discard the operator's real overrides), and
the AdminUI's preserve-unknown-keys bag keeps the key rather than rewriting stored config on an
unrelated edit.
The 01/U-6 knob-inertness guard carried an explicit carve-out admitting RecycleIntervalSeconds was
dormant and out of scope; that carve-out is now gone, so the expected set is literally what the
test's name claims.
Note: Host.IntegrationTests has 2 failures (DriverProbeRegistrationTests.is_idempotent,
PrimaryGateFailoverTests) — verified pre-existing by reproducing both on clean master dc9d947b.
Claude-Session: https://claude.ai/code/session_015p7wGqy3YpZNCpDzTpGMKo
Scripted-alarm condition state lives in LocalDb (Phase 4); the ConfigDb-backed
Ef store + ScriptedAlarmState table are now dead. Removes the test-harness Ef
fallback (a DB-backed node with no store now skips the alarm host), deletes the
store + entity + model config, and drops the table via migration.
Claude-Session: https://claude.ai/code/session_01GASWkNEi68FSCtvr6rLoEW
Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public
members surfaced by commentchecker — resolves 5,847 of 5,869 issues
(99.6%) across three /fixdocs passes.
Task 56: removes the legacy in-process Server + Admin Web project + their test
projects (Server.Tests, Admin.Tests, Admin.E2ETests). The fused OtOpcUa.Host
binary built across Phases 1-9 is now the sole production entry point.
What happened to the 47 legacy Admin Blazor pages: per follow-up F15, the
v1 architecture's draft/publish UX is replaced by v2's live-edit + snapshot-
deploy model, so a 1:1 migration is not meaningful. The mechanical move via
git mv preserves the history; service classes + page bodies that referenced
removed v1 types (ConfigGeneration, RedundancyRole, GenerationId) were
deleted. AdminUI now ships a minimal Home page + the v2 Deployments page.
Per-page rebuild against the v2 surface is tracked as F15. The v2 Deployments
page (Task 52) is the only first-party UI shipping in this PR.
Task 57: solution build green; 84+ tests green across active v2 + legacy
driver test projects.
Phase 1f — the consolidator migration. Closes out the v2 entity-model
rewrite by emitting a single EF migration that captures the cumulative
schema delta from 14a (RowVersion) through 14e (drop generation entities).
Generated: src/Core/ZB.MOM.WW.OtOpcUa.Configuration/Migrations/
20260526081556_V2HostingAlignment.cs (1562 lines)
20260526081556_V2HostingAlignment.Designer.cs
Migration shape (per `grep -nE migrationBuilder.\(...)`):
Drop 12 ForeignKey constraints (one per live-edit entity's GenerationId FK)
Drop 2 Tables (ConfigGeneration, ClusterNodeGenerationState)
Drop 45 Indexes (every UX_*_Generation_* and IX_*_Generation_* across the
13 live-edit tables — 1 also dropped the unique-Primary
filtered index UX_ClusterNode_Primary_Per_Cluster)
Drop 13 Columns (12 GenerationId + 1 RedundancyRole)
Add 12 RowVersion columns (one per live-edit entity)
Create 4 Tables (Deployment, NodeDeploymentState, ConfigEdit,
DataProtectionKeys)
Create ~45 Indexes (recreated under the new naming pattern
UX_<Table>_LogicalId / UX_<Table>_<X> with the
GenerationId column stripped from composite keys)
Notable EF quirks accepted:
Unique-on-required-column indexes (UX_VirtualTag_LogicalId etc.) ship a
`filter: "[VirtualTagId] IS NOT NULL"` clause that EF auto-inserts for
SQL Server. Harmless — the column is C#-side `required` so NULL never
appears.
Verification:
dotnet build src/Core/ZB.MOM.WW.OtOpcUa.Configuration -> 0 errors
dotnet ef migrations script --idempotent (against placeholder DSN)
-> 3259-line
.sql produced
OK
tests/Core/ZB.MOM.WW.OtOpcUa.Configuration.Tests -> 0 errors
Live `dotnet ef database update` against a scratch SQL Server deferred to
Task 15 (Migrate-To-V2.ps1) — SSH to the docker host needs a key/password I
don't have, and the always-on SQL at 10.100.0.35,14330 uses Integrated
Security (Windows auth, unreachable from this macOS dev). The migration
itself is structurally correct by construction (EF tooling generated it
against the live DbContext model); the live-DB confidence step is the
PowerShell wrapper's job.
SchemaComplianceTests updates:
- All_expected_tables_exist: removed ConfigGeneration +
ClusterNodeGenerationState; added Deployment, NodeDeploymentState,
ConfigEdit, DataProtectionKeys.
- Filtered_unique_indexes_match_schema_spec: removed entries for
UX_ClusterNode_Primary_Per_Cluster (Task 14d) and
UX_ConfigGeneration_Draft_Per_Cluster (Task 14e). Two filtered uniques
remain (UX_ClusterNodeCredential_Value, UX_ExternalIdReservation_KindValue_Active).
- Check_constraints_match_schema_spec: added CK_ConfigEdit_FieldsJson_IsJson.
StoredProceduresTests update:
- Removed RedundancyRole + 'Primary' from the raw INSERT into ClusterNode
so the DB-backed test runs against the new schema.
Group all 69 projects into category subfolders under src/ and tests/ so the
Rider Solution Explorer mirrors the module structure. Folders: Core, Server,
Drivers (with a nested Driver CLIs subfolder), Client, Tooling.
- Move every project folder on disk with git mv (history preserved as renames).
- Recompute relative paths in 57 .csproj files: cross-category ProjectReferences,
the lib/ HintPath+None refs in Driver.Historian.Wonderware, and the external
mxaccessgw refs in Driver.Galaxy and its test project.
- Rebuild ZB.MOM.WW.OtOpcUa.slnx with nested solution folders.
- Re-prefix project paths in functional scripts (e2e, compliance, smoke SQL,
integration, install).
Build green (0 errors); unit tests pass. Docs left for a separate pass.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Joseph Doherty