Consolidate workbench slices, provider groundwork, and PR 76 fixes

AGENTS.md

@@ -143,13 +143,18 @@ For this app:
 - the repo-root lowercase `.editorconfig` is the source of truth for formatting, naming, style, and analyzer severity
 - local and CI build commands must pass `-warnaserror`; warnings are not an acceptable "green" build state in this repository
 - do not run parallel `dotnet` or `MSBuild` work that shares the same checkout, target outputs, or NuGet package cache; the multi-target Uno app must build serially in CI to avoid `Uno.Resizetizer` file-lock failures
+- do not commit user-specific local paths, usernames, or machine-specific identifiers in tests, docs, snapshots, or fixtures; use neutral synthetic values so the repo stays portable and does not leak personal machine details
 - quality gates should prefer analyzer-backed build failures over separate one-off CI tools; for overloaded methods and maintainability drift, enable build-time analyzers such as `CA1502` instead of adding a formatting-only gate
 - `Directory.Build.props` owns the shared analyzer and warning policy for future projects
 - `Directory.Packages.props` owns centrally managed package versions
 - `global.json` pins the .NET SDK and Uno SDK version used by the app and tests
 - `DotPilot/DotPilot.csproj` keeps `GenerateDocumentationFile=true` with `CS1591` suppressed so `IDE0005` stays enforceable in CI across all target frameworks without inventing command-line-only build flags
 - architecture work must keep a vertical-slice shape: each feature owns its contracts, orchestration, and tests behind clear boundaries instead of growing a shared horizontal service layer
 - keep the Uno app project presentation-only; domain, runtime host, orchestration, integrations, and persistence code must live in separate class-library projects so UI composition does not mix with feature implementation
+- structure both `DotPilot.Tests` and `DotPilot.UITests` by vertical slice and explicit harness boundaries; do not keep test files in one flat project-root pile
+- GitHub is the backlog, not the product: use issues and PRs only to drive task scope and traceability, and never copy GitHub issue text, labels, workflow language, or tracker metadata into production code, runtime snapshots, or user-facing UI
+- Desktop responsiveness is a product requirement: avoid synchronous probe, filesystem, network, or process work on UI-facing construction and navigation paths so the app stays fast and immediately reactive
+- Do not invent a repo-specific product framing such as "workbench" unless the active issue or feature spec explicitly uses it; implement the app features described in the backlog instead of turning internal implementation language into the product narrative
 - GitHub Actions workflows must use descriptive names and filenames that reflect their purpose; do not use a generic `ci.yml` catch-all because build validation and release automation are separate operator flows
 - GitHub Actions must be split into at least one validation workflow for normal builds/tests and one release workflow for CI-driven version resolution, release-note generation, desktop publishing, and GitHub Release publication
 - meaningful GitHub review comments must be evaluated and fixed when they still apply even if the original PR was closed; closed review threads are not a reason to ignore valid engineering feedback
@@ -302,6 +307,7 @@ Local `AGENTS.md` files may tighten these values, but they must not loosen them
 - Hardcoded values are forbidden.
 - String literals are forbidden in implementation code. Declare them once as named constants, enums, configuration entries, or dedicated value objects, then reuse those symbols.
 - Avoid magic literals. Extract shared values into constants, enums, configuration, or dedicated types.
+- Backlog metadata does not belong in product code: issue numbers, PR numbers, review language, and planning terminology must never appear in production runtime models, diagnostics, or user-facing text unless the feature explicitly exposes source-control metadata.
 - Design boundaries so real behaviour can be tested through public interfaces.
 - For `.NET`, the repo-root `.editorconfig` is the source of truth for formatting, naming, style, and analyzer severity.
 - Use nested `.editorconfig` files when they serve a clear subtree-specific purpose. Do not let IDE defaults, pipeline flags, and repo config disagree.
@@ -360,6 +366,7 @@ Ask first:
 - Installing stale, non-canonical, or non-`mcaf-*` skills into the repo-local agent skill directory.
 - Moving root governance out of the repository root.
 - Mixing multiple `.NET` test frameworks in the active solution without a documented migration plan.
+- Running build, test, or verification commands for file-only structural reorganizations when the user explicitly asked for folder cleanup without behavior changes.
 - Adding fallback paths or alternate harnesses that only make failures disappear in tests while the primary product path remains broken.
 - Switching desktop Uno pages into stacked or mobile-style responsive layouts during resize work unless the user explicitly asks for a different composition; desktop pages must stay desktop-first and protect geometry through sizing constraints instead.
 - Adding extra UI-test orchestration complexity when the actual goal is simply to run the tests and get an honest pass or fail result.

DotPilot.Core/Features/ToolchainCenter/ToolchainCenterContracts.cs

@@ -4,7 +4,7 @@ namespace DotPilot.Core.Features.ToolchainCenter;
 
 public sealed record ToolchainCenterWorkstreamDescriptor(
     int IssueNumber,
-    string IssueLabel,
+    string SectionLabel,
     string Name,
     string Summary);
 
@@ -37,7 +37,7 @@ public sealed record ToolchainPollingDescriptor(
 
 public sealed record ToolchainProviderSnapshot(
     int IssueNumber,
-    string IssueLabel,
+    string SectionLabel,
     ProviderDescriptor Provider,
     string ExecutablePath,
     string InstalledVersion,

DotPilot.Runtime/Features/RuntimeFoundation/DeterministicAgentRuntimeClient.cs

@@ -8,7 +8,6 @@ namespace DotPilot.Runtime.Features.RuntimeFoundation;
 public sealed class DeterministicAgentRuntimeClient : IAgentRuntimeClient
 {
     private const string ApprovalKeyword = "approval";
-    private const string DeterministicProviderDisplayName = "Deterministic Runtime Client";
     private const string PlanSummary =
         "Planned the runtime foundation flow with contracts first, then communication, host lifecycle, and orchestration.";
     private const string ExecuteSummary =
@@ -35,7 +34,7 @@ public ValueTask<Result<AgentTurnResult>> ExecuteAsync(AgentTurnRequest request,
                 Result<AgentTurnResult>.Fail(
                     RuntimeCommunicationProblems.ProviderUnavailable(
                         request.ProviderStatus,
-                        DeterministicProviderDisplayName)));
+                        ProviderToolchainNames.DeterministicClientDisplayName)));
         }
 
         return ValueTask.FromResult(request.Mode switch
@@ -77,12 +76,12 @@ private static ArtifactDescriptor CreateArtifact(SessionId sessionId, string art
     {
         return new ArtifactDescriptor
         {
-            Id = ArtifactId.New(),
+            Id = RuntimeFoundationDeterministicIdentity.CreateArtifactId(sessionId, artifactName),
             SessionId = sessionId,
             Name = artifactName,
             Kind = artifactKind,
             RelativePath = artifactName,
-            CreatedAt = DateTimeOffset.UtcNow,
+            CreatedAt = RuntimeFoundationDeterministicIdentity.ArtifactCreatedAt,
         };
     }
 }

DotPilot.Runtime/Features/RuntimeFoundation/ProviderToolchainProbe.cs

@@ -26,7 +26,7 @@ status is ProviderConnectionStatus.Available
 
         return new ProviderDescriptor
         {
-            Id = ProviderId.New(),
+            Id = RuntimeFoundationDeterministicIdentity.CreateProviderId(commandName),
             DisplayName = displayName,
             CommandName = commandName,
             Status = status,

DotPilot.Runtime/Features/RuntimeFoundation/RuntimeFoundationCatalog.cs

@@ -1,38 +1,44 @@
 using DotPilot.Core.Features.ControlPlaneDomain;
 using DotPilot.Core.Features.RuntimeFoundation;
-using DotPilot.Runtime.Features.ToolchainCenter;
-
 namespace DotPilot.Runtime.Features.RuntimeFoundation;
 
 public sealed class RuntimeFoundationCatalog : IRuntimeFoundationCatalog
 {
     private const string EpicSummary =
-        "Issue #12 is staged into isolated contracts, communication, host, and orchestration slices so the Uno workbench can stay presentation-only.";
+        "Runtime contracts, host sequencing, and orchestration seams stay isolated so the Uno app can remain presentation-only.";
+    private const string EpicLabelValue = "LOCAL RUNTIME READINESS";
     private const string DeterministicProbePrompt =
         "Summarize the runtime foundation readiness for a local-first session that may require approval.";
     private const string DeterministicClientStatusSummary = "Always available for in-repo and CI validation.";
+    private const string DomainModelLabel = "DOMAIN";
     private const string DomainModelName = "Domain contracts";
     private const string DomainModelSummary =
         "Typed identifiers and durable agent, session, fleet, provider, and runtime contracts live outside the Uno app.";
+    private const string CommunicationLabel = "CONTRACTS";
     private const string CommunicationName = "Communication contracts";
     private const string CommunicationSummary =
         "Public result and problem boundaries are isolated so later provider and orchestration slices share one contract language.";
+    private const string HostLabel = "HOST";
     private const string HostName = "Embedded host";
     private const string HostSummary =
         "The Orleans host integration point is sequenced behind dedicated runtime contracts instead of being baked into page code.";
+    private const string OrchestrationLabel = "ORCHESTRATION";
     private const string OrchestrationName = "Orchestration runtime";
     private const string OrchestrationSummary =
         "Agent Framework integration is prepared as a separate slice that can plug into the embedded host without reshaping the UI layer.";
+    private readonly IReadOnlyList<ProviderDescriptor> _providers;
+
+    public RuntimeFoundationCatalog() => _providers = Array.AsReadOnly(CreateProviders());
 
     public RuntimeFoundationSnapshot GetSnapshot()
     {
         return new(
-            RuntimeFoundationIssues.FormatIssueLabel(RuntimeFoundationIssues.EmbeddedAgentRuntimeHostEpic),
+            EpicLabelValue,
             EpicSummary,
             ProviderToolchainNames.DeterministicClientDisplayName,
             DeterministicProbePrompt,
             CreateSlices(),
-            CreateProviders());
+            _providers);
     }
 
     private static IReadOnlyList<RuntimeSliceDescriptor> CreateSlices()
@@ -41,46 +47,44 @@ private static IReadOnlyList<RuntimeSliceDescriptor> CreateSlices()
         [
             new(
                 RuntimeFoundationIssues.DomainModel,
-                RuntimeFoundationIssues.FormatIssueLabel(RuntimeFoundationIssues.DomainModel),
+                DomainModelLabel,
                 DomainModelName,
                 DomainModelSummary,
                 RuntimeSliceState.ReadyForImplementation),
             new(
                 RuntimeFoundationIssues.CommunicationContracts,
-                RuntimeFoundationIssues.FormatIssueLabel(RuntimeFoundationIssues.CommunicationContracts),
+                CommunicationLabel,
                 CommunicationName,
                 CommunicationSummary,
                 RuntimeSliceState.Sequenced),
             new(
                 RuntimeFoundationIssues.EmbeddedOrleansHost,
-                RuntimeFoundationIssues.FormatIssueLabel(RuntimeFoundationIssues.EmbeddedOrleansHost),
+                HostLabel,
                 HostName,
                 HostSummary,
                 RuntimeSliceState.Sequenced),
             new(
                 RuntimeFoundationIssues.AgentFrameworkRuntime,
-                RuntimeFoundationIssues.FormatIssueLabel(RuntimeFoundationIssues.AgentFrameworkRuntime),
+                OrchestrationLabel,
                 OrchestrationName,
                 OrchestrationSummary,
                 RuntimeSliceState.Sequenced),
         ];
     }
 
-    private static IReadOnlyList<ProviderDescriptor> CreateProviders()
+    private static ProviderDescriptor[] CreateProviders()
     {
         return
         [
             new ProviderDescriptor
             {
-                Id = ProviderId.New(),
+                Id = RuntimeFoundationDeterministicIdentity.CreateProviderId(ProviderToolchainNames.DeterministicClientCommandName),
                 DisplayName = ProviderToolchainNames.DeterministicClientDisplayName,
                 CommandName = ProviderToolchainNames.DeterministicClientCommandName,
                 Status = ProviderConnectionStatus.Available,
                 StatusSummary = DeterministicClientStatusSummary,
                 RequiresExternalToolchain = false,
             },
-            .. ToolchainProviderSnapshotFactory.Create(TimeProvider.System.GetUtcNow())
-                .Select(snapshot => snapshot.Provider),
         ];
     }
 }

DotPilot.Runtime/Features/RuntimeFoundation/RuntimeFoundationDeterministicIdentity.cs

@@ -0,0 +1,34 @@
+using System.Security.Cryptography;
+using System.Text;
+using DotPilot.Core.Features.ControlPlaneDomain;
+
+namespace DotPilot.Runtime.Features.RuntimeFoundation;
+
+internal static class RuntimeFoundationDeterministicIdentity
+{
+    private const string ArtifactSeedPrefix = "runtime-foundation-artifact";
+    private const string ProviderSeedPrefix = "runtime-foundation-provider";
+    private const string SeedSeparator = "|";
+
+    public static DateTimeOffset ArtifactCreatedAt { get; } = new(2026, 3, 13, 0, 0, 0, TimeSpan.Zero);
+
+    public static ArtifactId CreateArtifactId(SessionId sessionId, string artifactName)
+    {
+        return new(CreateGuid(string.Concat(ArtifactSeedPrefix, SeedSeparator, sessionId, SeedSeparator, artifactName)));
+    }
+
+    public static ProviderId CreateProviderId(string commandName)
+    {
+        return new(CreateGuid(string.Concat(ProviderSeedPrefix, SeedSeparator, commandName)));
+    }
+
+    private static Guid CreateGuid(string seed)
+    {
+        var hash = SHA256.HashData(Encoding.UTF8.GetBytes(seed));
+        Span<byte> guidBytes = stackalloc byte[16];
+        hash[..guidBytes.Length].CopyTo(guidBytes);
+        guidBytes[7] = (byte)((guidBytes[7] & 0x0F) | 0x80);
+        guidBytes[8] = (byte)((guidBytes[8] & 0x3F) | 0x80);
+        return new Guid(guidBytes);
+    }
+}

DotPilot.Runtime/Features/ToolchainCenter/ToolchainCenterCatalog.cs

@@ -4,25 +4,31 @@ namespace DotPilot.Runtime.Features.ToolchainCenter;
 
 public sealed class ToolchainCenterCatalog : IToolchainCenterCatalog, IDisposable
 {
+    private const string EpicLabelValue = "PRE-SESSION READINESS";
     private const string EpicSummary =
-        "Issue #14 keeps provider installation, auth, diagnostics, configuration, and polling visible before the first live session.";
+        "Provider installation, launch checks, authentication, configuration, and refresh state stay visible before the first live session.";
+    private const string UiWorkstreamLabel = "SURFACE";
     private const string UiWorkstreamName = "Toolchain Center UI";
     private const string UiWorkstreamSummary =
         "The settings shell exposes a first-class desktop Toolchain Center with provider cards, detail panes, and operator actions.";
+    private const string DiagnosticsWorkstreamLabel = "DIAGNOSTICS";
     private const string DiagnosticsWorkstreamName = "Connection diagnostics";
     private const string DiagnosticsWorkstreamSummary =
         "Launch, connection, resume, tool access, and auth diagnostics stay attributable before live work starts.";
+    private const string ConfigurationWorkstreamLabel = "CONFIGURATION";
     private const string ConfigurationWorkstreamName = "Secrets and environment";
     private const string ConfigurationWorkstreamSummary =
         "Provider secrets, local overrides, and non-secret environment configuration stay visible without leaking values.";
+    private const string PollingWorkstreamLabel = "POLLING";
     private const string PollingWorkstreamName = "Background polling";
     private const string PollingWorkstreamSummary =
-        "Version and auth readiness refresh in the background so the workbench can surface stale state early.";
+        "Version and auth readiness refresh in the background so the app can surface stale state early.";
     private readonly TimeProvider _timeProvider;
     private readonly CancellationTokenSource _disposeTokenSource = new();
     private readonly PeriodicTimer? _pollingTimer;
     private readonly Task _pollingTask;
     private ToolchainCenterSnapshot _snapshot;
+    private int _disposeState;
 
     public ToolchainCenterCatalog()
         : this(TimeProvider.System, startBackgroundPolling: true)
@@ -46,13 +52,29 @@ public ToolchainCenterCatalog(TimeProvider timeProvider, bool startBackgroundPol
         }
     }
 
-    public ToolchainCenterSnapshot GetSnapshot() => _snapshot;
+    public ToolchainCenterSnapshot GetSnapshot() => Volatile.Read(ref _snapshot);
 
     public void Dispose()
     {
+        if (Interlocked.Exchange(ref _disposeState, 1) != 0)
+        {
+            return;
+        }
+
         _disposeTokenSource.Cancel();
         _pollingTimer?.Dispose();
+
+        try
+        {
+            _pollingTask.GetAwaiter().GetResult();
+        }
+        catch (OperationCanceledException)
+        {
+            // Expected during shutdown.
+        }
+
         _disposeTokenSource.Dispose();
+        GC.SuppressFinalize(this);
     }
 
     private async Task PollAsync()
@@ -66,21 +88,25 @@ private async Task PollAsync()
         {
             while (await _pollingTimer.WaitForNextTickAsync(_disposeTokenSource.Token))
             {
-                _snapshot = EvaluateSnapshot();
+                Volatile.Write(ref _snapshot, EvaluateSnapshot());
             }
         }
         catch (OperationCanceledException)
         {
             // Expected during app shutdown.
         }
+        catch (ObjectDisposedException) when (_disposeTokenSource.IsCancellationRequested)
+        {
+            // Expected when the timer is disposed during shutdown.
+        }
     }
 
     private ToolchainCenterSnapshot EvaluateSnapshot()
     {
         var evaluatedAt = _timeProvider.GetUtcNow();
         var providers = ToolchainProviderSnapshotFactory.Create(evaluatedAt);
         return new(
-            ToolchainCenterIssues.FormatIssueLabel(ToolchainCenterIssues.ToolchainCenterEpic),
+            EpicLabelValue,
             EpicSummary,
             CreateWorkstreams(),
             providers,
@@ -95,22 +121,22 @@ private static IReadOnlyList<ToolchainCenterWorkstreamDescriptor> CreateWorkstre
         [
             new(
                 ToolchainCenterIssues.ToolchainCenterUi,
-                ToolchainCenterIssues.FormatIssueLabel(ToolchainCenterIssues.ToolchainCenterUi),
+                UiWorkstreamLabel,
                 UiWorkstreamName,
                 UiWorkstreamSummary),
             new(
                 ToolchainCenterIssues.ConnectionDiagnostics,
-                ToolchainCenterIssues.FormatIssueLabel(ToolchainCenterIssues.ConnectionDiagnostics),
+                DiagnosticsWorkstreamLabel,
                 DiagnosticsWorkstreamName,
                 DiagnosticsWorkstreamSummary),
             new(
                 ToolchainCenterIssues.ProviderConfiguration,
-                ToolchainCenterIssues.FormatIssueLabel(ToolchainCenterIssues.ProviderConfiguration),
+                ConfigurationWorkstreamLabel,
                 ConfigurationWorkstreamName,
                 ConfigurationWorkstreamSummary),
             new(
                 ToolchainCenterIssues.BackgroundPolling,
-                ToolchainCenterIssues.FormatIssueLabel(ToolchainCenterIssues.BackgroundPolling),
+                PollingWorkstreamLabel,
                 PollingWorkstreamName,
                 PollingWorkstreamSummary),
         ];