Follow up PR 76 review fixes and startup responsiveness

AGENTS.md

@@ -150,6 +150,9 @@ For this app:
 - `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
+- 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 +305,7 @@ 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.

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 = CreateProviders();
 
     public RuntimeFoundationSnapshot GetSnapshot()
     {
         return new(
-            RuntimeFoundationIssues.FormatIssueLabel(RuntimeFoundationIssues.EmbeddedAgentRuntimeHostEpic),
+            EpicLabelValue,
             EpicSummary,
             ProviderToolchainNames.DeterministicClientDisplayName,
             DeterministicProbePrompt,
             CreateSlices(),
-            CreateProviders());
+            _providers);
     }
 
     private static IReadOnlyList<RuntimeSliceDescriptor> CreateSlices()
@@ -41,25 +47,25 @@ 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),
@@ -79,8 +85,6 @@ private static IReadOnlyList<ProviderDescriptor> CreateProviders()
                 StatusSummary = DeterministicClientStatusSummary,
                 RequiresExternalToolchain = false,
             },
-            .. ToolchainProviderSnapshotFactory.Create(TimeProvider.System.GetUtcNow())
-                .Select(snapshot => snapshot.Provider),
         ];
     }
 }

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 = "PRESESSION 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),
         ];

DotPilot.Runtime/Features/ToolchainCenter/ToolchainCommandProbe.cs

@@ -6,19 +6,23 @@ internal static class ToolchainCommandProbe
 {
     private static readonly TimeSpan CommandTimeout = TimeSpan.FromSeconds(2);
     private const string VersionSeparator = "version";
+    private const string EmptyOutput = "";
 
     public static string? ResolveExecutablePath(string commandName) =>
         RuntimeFoundation.ProviderToolchainProbe.ResolveExecutablePath(commandName);
 
     public static string ReadVersion(string executablePath, IReadOnlyList<string> arguments)
+        => ProbeVersion(executablePath, arguments).Version;
+
+    public static ToolchainVersionProbeResult ProbeVersion(string executablePath, IReadOnlyList<string> arguments)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(executablePath);
         ArgumentNullException.ThrowIfNull(arguments);
 
         var execution = Execute(executablePath, arguments);
         if (!execution.Succeeded)
         {
-            return string.Empty;
+            return ToolchainVersionProbeResult.Missing with { Launched = execution.Launched };
         }
 
         var output = string.IsNullOrWhiteSpace(execution.StandardOutput)
@@ -31,13 +35,15 @@ public static string ReadVersion(string executablePath, IReadOnlyList<string> ar
 
         if (string.IsNullOrWhiteSpace(firstLine))
         {
-            return string.Empty;
+            return ToolchainVersionProbeResult.Missing with { Launched = execution.Launched };
         }
 
         var separatorIndex = firstLine.IndexOf(VersionSeparator, StringComparison.OrdinalIgnoreCase);
-        return separatorIndex >= 0
+        var version = separatorIndex >= 0
             ? firstLine[(separatorIndex + VersionSeparator.Length)..].Trim(' ', ':')
             : firstLine.Trim();
+
+        return new(execution.Launched, version);
     }
 
     public static bool CanExecute(string executablePath, IReadOnlyList<string> arguments)
@@ -64,22 +70,57 @@ private static ToolchainCommandExecution Execute(string executablePath, IReadOnl
             startInfo.ArgumentList.Add(argument);
         }
 
-        using var process = Process.Start(startInfo);
+        Process? process;
+        try
+        {
+            process = Process.Start(startInfo);
+        }
+        catch
+        {
+            return ToolchainCommandExecution.LaunchFailed;
+        }
+
         if (process is null)
         {
-            return ToolchainCommandExecution.Failed;
+            return ToolchainCommandExecution.LaunchFailed;
         }
 
-        if (!process.WaitForExit((int)CommandTimeout.TotalMilliseconds))
+        using (process)
         {
-            TryTerminate(process);
-            return ToolchainCommandExecution.Failed;
+            var standardOutputTask = process.StandardOutput.ReadToEndAsync();
+            var standardErrorTask = process.StandardError.ReadToEndAsync();
+
+            if (!process.WaitForExit((int)CommandTimeout.TotalMilliseconds))
+            {
+                TryTerminate(process);
+                ObserveRedirectedStreamFaults(standardOutputTask, standardErrorTask);
+                return new(true, false, EmptyOutput, EmptyOutput);
+            }
+
+            return new(
+                true,
+                process.ExitCode == 0,
+                AwaitStreamRead(standardOutputTask),
+                AwaitStreamRead(standardErrorTask));
         }
+    }
 
-        return new(
-            process.ExitCode == 0,
-            process.StandardOutput.ReadToEnd(),
-            process.StandardError.ReadToEnd());
+    private static string AwaitStreamRead(Task<string> readTask)
+    {
+        try
+        {
+            return readTask.GetAwaiter().GetResult();
+        }
+        catch
+        {
+            return EmptyOutput;
+        }
+    }
+
+    private static void ObserveRedirectedStreamFaults(Task<string> standardOutputTask, Task<string> standardErrorTask)
+    {
+        _ = standardOutputTask.Exception;
+        _ = standardErrorTask.Exception;
     }
 
     private static void TryTerminate(Process process)
@@ -97,8 +138,13 @@ private static void TryTerminate(Process process)
         }
     }
 
-    private readonly record struct ToolchainCommandExecution(bool Succeeded, string StandardOutput, string StandardError)
+    public readonly record struct ToolchainVersionProbeResult(bool Launched, string Version)
+    {
+        public static ToolchainVersionProbeResult Missing => new(false, EmptyOutput);
+    }
+
+    private readonly record struct ToolchainCommandExecution(bool Launched, bool Succeeded, string StandardOutput, string StandardError)
     {
-        public static ToolchainCommandExecution Failed => new(false, string.Empty, string.Empty);
+        public static ToolchainCommandExecution LaunchFailed => new(false, false, EmptyOutput, EmptyOutput);
     }
 }

DotPilot.Runtime/Features/ToolchainCenter/ToolchainProviderProfile.cs

@@ -2,6 +2,7 @@ namespace DotPilot.Runtime.Features.ToolchainCenter;
 
 internal sealed record ToolchainProviderProfile(
     int IssueNumber,
+    string SectionLabel,
     string DisplayName,
     string CommandName,
     IReadOnlyList<string> VersionArguments,

DotPilot.Runtime/Features/ToolchainCenter/ToolchainProviderProfiles.cs

@@ -19,12 +19,16 @@ internal static class ToolchainProviderProfiles
     private const string GitHubTokenSummary = "GitHub token for Copilot and GitHub CLI authenticated flows.";
     private const string GitHubHostTokenSummary = "Alternative GitHub host token for CLI-authenticated Copilot flows.";
     private const string GitHubModelsApiKeySummary = "Optional BYOK key for GitHub Models-backed Copilot routing.";
+    private const string CodexSectionLabel = "CODEX";
+    private const string ClaudeSectionLabel = "CLAUDE";
+    private const string GitHubSectionLabel = "GITHUB";
     private static readonly string[] VersionArguments = ["--version"];
 
     public static IReadOnlyList<ToolchainProviderProfile> All { get; } =
     [
         new(
             ToolchainCenterIssues.CodexReadiness,
+            CodexSectionLabel,
             ProviderToolchainNames.CodexDisplayName,
             ProviderToolchainNames.CodexCommandName,
             VersionArguments,
@@ -40,6 +44,7 @@ internal static class ToolchainProviderProfiles
             ]),
         new(
             ToolchainCenterIssues.ClaudeCodeReadiness,
+            ClaudeSectionLabel,
             ProviderToolchainNames.ClaudeCodeDisplayName,
             ProviderToolchainNames.ClaudeCodeCommandName,
             VersionArguments,
@@ -55,6 +60,7 @@ internal static class ToolchainProviderProfiles
             ]),
         new(
             ToolchainCenterIssues.GitHubCopilotReadiness,
+            GitHubSectionLabel,
             ProviderToolchainNames.GitHubCopilotDisplayName,
             ProviderToolchainNames.GitHubCopilotCommandName,
             VersionArguments,