diff --git a/src/ClaudeDo.Data/Wire.cs b/src/ClaudeDo.Data/Wire.cs
index b38f01e2..79e75d7d 100644
--- a/src/ClaudeDo.Data/Wire.cs
+++ b/src/ClaudeDo.Data/Wire.cs
@@ -13,8 +13,6 @@ namespace ClaudeDo.Data.Wire;
 
 public record ActiveTaskDto(string Slot, string TaskId, DateTime StartedAt);
 
-public record WorkerBuildInfoDto(string? BuildSha);
-
 public record AppSettingsDto(
     string DefaultClaudeInstructions,
     string DefaultModel,
diff --git a/src/ClaudeDo.Localization/locales/de.json b/src/ClaudeDo.Localization/locales/de.json
index 22f5c5f5..d125bed2 100644
--- a/src/ClaudeDo.Localization/locales/de.json
+++ b/src/ClaudeDo.Localization/locales/de.json
@@ -720,9 +720,6 @@
       "updateNow": "Jetzt aktualisieren",
       "dismiss": "Ausblenden"
     },
-    "staleWorker": {
-      "message": "Der Worker läuft auf einem älteren Stand als der gemergte main-Branch dieses Repos — Neustart nötig, damit gemergte Änderungen wirken."
-    },
     "externalMerge": {
       "banner": "Eine Claude-Session löst gerade einen Merge-Konflikt auf — bitte keine Dateien im Repository bearbeiten.",
       "open": "Resolver öffnen"
diff --git a/src/ClaudeDo.Localization/locales/en.json b/src/ClaudeDo.Localization/locales/en.json
index fb55c9bd..1ec8540e 100644
--- a/src/ClaudeDo.Localization/locales/en.json
+++ b/src/ClaudeDo.Localization/locales/en.json
@@ -720,9 +720,6 @@
       "updateNow": "Update now",
       "dismiss": "Dismiss"
     },
-    "staleWorker": {
-      "message": "The worker is running an older build than this repo's merged main — restart it so your merged changes take effect."
-    },
     "externalMerge": {
       "banner": "A Claude session is resolving a merge conflict — don't edit files in the repository.",
       "open": "Open resolver"
diff --git a/src/ClaudeDo.Ui/Services/Interfaces/IWorkerClient.cs b/src/ClaudeDo.Ui/Services/Interfaces/IWorkerClient.cs
index 049e0376..44be700f 100644
--- a/src/ClaudeDo.Ui/Services/Interfaces/IWorkerClient.cs
+++ b/src/ClaudeDo.Ui/Services/Interfaces/IWorkerClient.cs
@@ -183,9 +183,6 @@ public interface IWorkerClient : INotifyPropertyChanged
     Task<string> GetLastPrepLogAsync();
     Task<IReadOnlyList<WorkerLogEntry>> GetRecentLogsAsync();
 
-    /// <summary>Git SHA the running worker was built from (null when offline or the build isn't stamped).</summary>
-    Task<WorkerBuildInfoDto?> GetWorkerBuildInfoAsync();
-
     Task<List<PrimeScheduleDto>> GetPrimeSchedulesAsync();
     Task<PrimeScheduleDto?> UpsertPrimeScheduleAsync(PrimeScheduleDto dto);
     Task DeletePrimeScheduleAsync(Guid id);
diff --git a/src/ClaudeDo.Ui/Services/WorkerClient.cs b/src/ClaudeDo.Ui/Services/WorkerClient.cs
index 3f5bab8a..af0cadcc 100644
--- a/src/ClaudeDo.Ui/Services/WorkerClient.cs
+++ b/src/ClaudeDo.Ui/Services/WorkerClient.cs
@@ -492,9 +492,6 @@ public partial class WorkerClient : ObservableObject, IAsyncDisposable, IWorkerC
     public async Task<string> GetLastPrepLogAsync()
         => await TryInvokeAsync<string>("GetLastPrepLog") ?? string.Empty;
 
-    public Task<WorkerBuildInfoDto?> GetWorkerBuildInfoAsync()
-        => TryInvokeAsync<WorkerBuildInfoDto>("GetWorkerBuildInfo");
-
     public async Task<IReadOnlyList<WorkerLogEntry>> GetRecentLogsAsync()
         => await TryInvokeAsync<List<WorkerLogEntry>>("GetRecentLogs") ?? new List<WorkerLogEntry>();
 
diff --git a/src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs b/src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs
index ea21b950..0ab97a33 100644
--- a/src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs
+++ b/src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs
@@ -5,7 +5,6 @@ using System.Threading.Tasks;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using ClaudeDo.Data;
-using ClaudeDo.Data.Git;
 using ClaudeDo.Data.Models;
 using ClaudeDo.Ui.Localization;
 using ClaudeDo.Ui.Services;
@@ -52,7 +51,6 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
     private readonly UpdateCheckService _updateCheck = null!;
     private readonly InstallerLocator _installerLocator = null!;
     private readonly WorkerLocator _workerLocator = null!;
-    private readonly GitService? _git;
     private readonly IDbContextFactory<ClaudeDoDbContext>? _dbFactory;
     private readonly Func<WorktreesOverviewModalViewModel> _worktreesOverviewVmFactory = () => null!;
     private readonly Func<WeeklyReportModalViewModel> _weeklyReportVmFactory = () => null!;
@@ -121,11 +119,6 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
     [ObservableProperty] private string? _updateBannerLatestVersion;
     private bool _bannerDismissedThisSession;
 
-    // Persistent (not auto-clearing) banner: the running worker predates the selected list's
-    // merged HEAD, so "verified" claims made against the current process are stale. ClaudeDo-repo
-    // only — see RefreshStaleWorkerCheckAsync.
-    [ObservableProperty] private bool _isStaleWorkerBannerVisible;
-
     // planningTaskId -> subtaskId, for unit-merge conflicts an MCP session (not the UI) started.
     // Kept as a dictionary so a later conflict on the same planning task updates in place instead
     // of piling up duplicate entries.
@@ -328,8 +321,7 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
         Func<MergeModalViewModel> mergeVmFactory,
         Func<RepoImportModalViewModel> repoImportVmFactory,
         MissionControlViewModel missionControl,
-        UsagePillViewModel usagePill,
-        GitService? git = null)
+        UsagePillViewModel usagePill)
     {
         Lists = lists; Tasks = tasks; Details = details; Worker = worker;
         MissionControl = missionControl;
@@ -349,9 +341,7 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
         _usageMonitorVmFactory = usageMonitorVmFactory;
         _mergeVmFactory = mergeVmFactory;
         _repoImportVmFactory = repoImportVmFactory;
-        _git = git;
         Lists.SelectionChanged += (_, _) => Tasks.LoadForList(Lists.SelectedList);
-        Lists.SelectionChanged += (_, _) => _ = RefreshStaleWorkerCheckAsync();
         Tasks.SelectionChanged += (_, _) => Details.Bind(Tasks.SelectedTask, Tasks.SelectionSource);
         Tasks.PrepRequested += () => Details.ShowPrep();
         Tasks.PropertyChanged += (_, e) =>
@@ -418,7 +408,6 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
         };
         Worker.OperationProgressEvent += OnOperationProgress;
         Worker.WorkerLogReceivedEvent += OnWorkerLogReceived;
-        Worker.ConnectionRestoredEvent += () => _ = RefreshStaleWorkerCheckAsync();
         Worker.PlanningMergeConflictEvent += OnPlanningMergeConflict;
         Worker.PlanningMergeAbortedEvent += OnPlanningMergeAborted;
         Worker.PlanningCompletedEvent += OnPlanningMergeCompleted;
@@ -471,8 +460,6 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
         _connectTimer.Dispose();
         _primeStatusTimer.Stop();
         _primeStatusTimer.Dispose();
-        _staleWorkerCts?.Cancel();
-        _staleWorkerCts?.Dispose();
     }
 
     private void RefreshBannerFromStatus()
@@ -492,57 +479,6 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
         }
     }
 
-    private CancellationTokenSource? _staleWorkerCts;
-
-    // Re-evaluates the stale-worker banner for the currently selected list. Cheap (one hub call +
-    // up to two git subprocesses) and only ever runs for a git-backed list, so it's fine to fire on
-    // every selection change / reconnect rather than caching.
-    private async Task RefreshStaleWorkerCheckAsync()
-    {
-        _staleWorkerCts?.Cancel();
-        var cts = new CancellationTokenSource();
-        _staleWorkerCts = cts;
-
-        var stale = await ComputeIsStaleWorkerAsync(Lists?.SelectedList?.WorkingDir, cts.Token);
-        if (cts.IsCancellationRequested) return;
-        IsStaleWorkerBannerVisible = stale;
-    }
-
-    private async Task<bool> ComputeIsStaleWorkerAsync(string? workingDir, CancellationToken ct)
-    {
-        if (_git is null || Worker is null || string.IsNullOrWhiteSpace(workingDir)) return false;
-
-        try
-        {
-            var buildInfo = await Worker.GetWorkerBuildInfoAsync();
-            var buildSha = buildInfo?.BuildSha;
-            if (string.IsNullOrWhiteSpace(buildSha)) return false;
-            if (!await _git.IsGitRepoAsync(workingDir, ct)) return false;
-
-            var head = await _git.RevParseHeadAsync(workingDir, ct);
-            var isAncestor = string.Equals(buildSha, head, StringComparison.OrdinalIgnoreCase)
-                ? (bool?)false // equal — never "stale" on a match, and no need to ask git
-                : await _git.IsAncestorAsync(workingDir, buildSha, head, ct);
-            return ShouldShowStaleWorkerBanner(buildSha, head, isAncestor);
-        }
-        catch
-        {
-            // Worker offline, dir no longer a repo, etc. — unknown, so stay quiet.
-            return false;
-        }
-    }
-
-    // Pure decision extracted for testability. isAncestor is the tri-state result of
-    // `git merge-base --is-ancestor buildSha head`: true = worker predates head (stale), false =
-    // equal or diverged (never claim "stale" on a match or an unrelated history), null = unknown
-    // (e.g. buildSha isn't a commit this repo knows about — never treat "unknown" as "stale").
-    internal static bool ShouldShowStaleWorkerBanner(string? buildSha, string? headSha, bool? isAncestor)
-    {
-        if (string.IsNullOrWhiteSpace(buildSha) || string.IsNullOrWhiteSpace(headSha)) return false;
-        if (string.Equals(buildSha, headSha, StringComparison.OrdinalIgnoreCase)) return false;
-        return isAncestor == true;
-    }
-
     [RelayCommand]
     private void OpenMissionControl()
     {
diff --git a/src/ClaudeDo.Ui/Views/MainWindow.axaml b/src/ClaudeDo.Ui/Views/MainWindow.axaml
index 692860df..08462443 100644
--- a/src/ClaudeDo.Ui/Views/MainWindow.axaml
+++ b/src/ClaudeDo.Ui/Views/MainWindow.axaml
@@ -259,29 +259,6 @@
       </StackPanel>
     </Border>
 
-    <!-- Stale-worker notice — bottom-right corner, above the update popup. Persistent
-         (no auto-dismiss timer): the running worker predates the selected list's merged
-         HEAD, so a restart is needed before "verified" claims against it are trustworthy. -->
-    <Border Grid.Row="0" Grid.RowSpan="3"
-            VerticalAlignment="Bottom" HorizontalAlignment="Right"
-            Margin="0,0,16,100"
-            ZIndex="100"
-            IsVisible="{Binding IsStaleWorkerBannerVisible}"
-            Background="{DynamicResource DeepBrush}"
-            BorderBrush="{DynamicResource LineBrush}"
-            BorderThickness="1"
-            CornerRadius="6"
-            Padding="14,10">
-      <StackPanel Spacing="8" Width="260">
-        <TextBlock Classes="body" Text="{loc:Tr shell.staleWorker.message}" TextWrapping="Wrap"/>
-        <StackPanel Orientation="Horizontal" Spacing="8" HorizontalAlignment="Right">
-          <Button Classes="btn"
-                  Content="{loc:Tr shell.menu.restartWorker}"
-                  Command="{Binding RestartWorkerCommand}"/>
-        </StackPanel>
-      </StackPanel>
-    </Border>
-
     <!-- External merge popup card — bottom-left corner, while an MCP session owns an
          unresolved unit-merge conflict. Does not auto-dismiss; stays until the merge ends. -->
     <Border Grid.Row="0" Grid.RowSpan="3"
diff --git a/src/ClaudeDo.Worker/ClaudeDo.Worker.csproj b/src/ClaudeDo.Worker/ClaudeDo.Worker.csproj
index c95498cf..3fb6168a 100644
--- a/src/ClaudeDo.Worker/ClaudeDo.Worker.csproj
+++ b/src/ClaudeDo.Worker/ClaudeDo.Worker.csproj
@@ -35,18 +35,4 @@
     <InternalsVisibleTo Include="ClaudeDo.Worker.Tests" />
   </ItemGroup>
 
-  <!-- Stamps this worker's exact commit into AssemblyInformationalVersion as "+{sha}" so a
-       running instance can report which commit it was built from (see WorkerHub.GetWorkerBuildInfo).
-       Independent of MinVer: MinVerVersionOverride (release builds) replaces the base version but
-       doesn't touch SourceRevisionId, and the SDK appends it to InformationalVersion regardless. -->
-  <Target Name="SetBuildRevisionFromGit" BeforeTargets="GetAssemblyVersion" Condition="'$(SourceRevisionId)' == ''">
-    <Exec Command="git rev-parse HEAD"
-          WorkingDirectory="$(MSBuildProjectDirectory)"
-          ConsoleToMSBuild="true"
-          StandardOutputImportance="low"
-          ContinueOnError="WarnAndContinue">
-      <Output TaskParameter="ConsoleOutput" PropertyName="SourceRevisionId" />
-    </Exec>
-  </Target>
-
 </Project>
diff --git a/src/ClaudeDo.Worker/Hub/WorkerHub.cs b/src/ClaudeDo.Worker/Hub/WorkerHub.cs
index 83e6e6d1..600ab997 100644
--- a/src/ClaudeDo.Worker/Hub/WorkerHub.cs
+++ b/src/ClaudeDo.Worker/Hub/WorkerHub.cs
@@ -35,20 +35,6 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
     private static readonly string Version =
         Assembly.GetExecutingAssembly().GetName().Version?.ToString(3) ?? "0.0.0";
 
-    // SourceRevisionId (set by ClaudeDo.Worker.csproj's git-rev-parse build target) is appended
-    // by the SDK to InformationalVersion as "+{sha}" -- take the segment after the LAST '+' so
-    // this stays correct even when MinVer's own pre-release metadata already contains a '+'.
-    private static readonly string? BuildSha = ParseBuildSha(
-        Assembly.GetExecutingAssembly().GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion);
-
-    internal static string? ParseBuildSha(string? informationalVersion)
-    {
-        if (string.IsNullOrEmpty(informationalVersion)) return null;
-        var plusIndex = informationalVersion.LastIndexOf('+');
-        if (plusIndex < 0 || plusIndex == informationalVersion.Length - 1) return null;
-        return informationalVersion[(plusIndex + 1)..];
-    }
-
     private readonly QueueService _queue;
     private readonly IQueueWaker _waker;
     private readonly AgentFileService _agentService;
@@ -233,11 +219,6 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
 
     public string Ping() => $"pong v{Version}";
 
-    /// <summary>Lets the UI detect a worker that's still running an older build than the code it's
-    /// comparing against (e.g. a just-merged main) — a separate diagnostic rather than extending
-    /// Ping's "pong vX.Y.Z" text, since that format isn't ours to break for any existing caller.</summary>
-    public WorkerBuildInfoDto GetWorkerBuildInfo() => new(BuildSha);
-
     public IReadOnlyList<ActiveTaskDto> GetActive()
     {
         return _queue.GetActive()
diff --git a/tests/ClaudeDo.Ui.Tests/StaleWorkerBannerDecisionTests.cs b/tests/ClaudeDo.Ui.Tests/StaleWorkerBannerDecisionTests.cs
deleted file mode 100644
index 46e00430..00000000
--- a/tests/ClaudeDo.Ui.Tests/StaleWorkerBannerDecisionTests.cs
+++ /dev/null
@@ -1,47 +0,0 @@
-using ClaudeDo.Ui.ViewModels;
-using Xunit;
-
-namespace ClaudeDo.Ui.Tests;
-
-public class StaleWorkerBannerDecisionTests
-{
-    private const string ShaA = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
-    private const string ShaB = "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb";
-
-    [Fact]
-    public void True_when_build_is_a_strict_ancestor_of_head()
-    {
-        Assert.True(IslandsShellViewModel.ShouldShowStaleWorkerBanner(ShaA, ShaB, isAncestor: true));
-    }
-
-    [Fact]
-    public void False_when_build_equals_head_even_if_ancestor_check_says_true()
-    {
-        Assert.False(IslandsShellViewModel.ShouldShowStaleWorkerBanner(ShaA, ShaA, isAncestor: true));
-    }
-
-    [Fact]
-    public void False_when_ancestor_check_says_no()
-    {
-        Assert.False(IslandsShellViewModel.ShouldShowStaleWorkerBanner(ShaA, ShaB, isAncestor: false));
-    }
-
-    [Fact]
-    public void False_when_ancestor_check_is_unknown()
-    {
-        // Unknown must never be treated as stale.
-        Assert.False(IslandsShellViewModel.ShouldShowStaleWorkerBanner(ShaA, ShaB, isAncestor: null));
-    }
-
-    [Fact]
-    public void False_when_build_sha_missing()
-    {
-        Assert.False(IslandsShellViewModel.ShouldShowStaleWorkerBanner(null, ShaB, isAncestor: true));
-    }
-
-    [Fact]
-    public void False_when_head_sha_missing()
-    {
-        Assert.False(IslandsShellViewModel.ShouldShowStaleWorkerBanner(ShaA, null, isAncestor: true));
-    }
-}
diff --git a/tests/ClaudeDo.Ui.Tests/StubWorkerClient.cs b/tests/ClaudeDo.Ui.Tests/StubWorkerClient.cs
index 3722e9da..d9a05bec 100644
--- a/tests/ClaudeDo.Ui.Tests/StubWorkerClient.cs
+++ b/tests/ClaudeDo.Ui.Tests/StubWorkerClient.cs
@@ -170,8 +170,6 @@ public abstract class StubWorkerClient : IWorkerClient
     public virtual Task DeleteDailyNoteAsync(string id) => Task.CompletedTask;
     public string LastPrepLog = "";
     public virtual Task<string> GetLastPrepLogAsync() => Task.FromResult(LastPrepLog);
-    public WorkerBuildInfoDto? WorkerBuildInfo;
-    public virtual Task<WorkerBuildInfoDto?> GetWorkerBuildInfoAsync() => Task.FromResult(WorkerBuildInfo);
     public virtual Task RefineTaskAsync(string taskId) => Task.CompletedTask;
 
     public virtual Task<ClaudeBinDto?> GetClaudeBinAsync() => Task.FromResult<ClaudeBinDto?>(null);
diff --git a/tests/ClaudeDo.Worker.Tests/Hub/WorkerBuildInfoHubTests.cs b/tests/ClaudeDo.Worker.Tests/Hub/WorkerBuildInfoHubTests.cs
deleted file mode 100644
index c4a3d4db..00000000
--- a/tests/ClaudeDo.Worker.Tests/Hub/WorkerBuildInfoHubTests.cs
+++ /dev/null
@@ -1,36 +0,0 @@
-using ClaudeDo.Worker.Hub;
-using Xunit;
-
-namespace ClaudeDo.Worker.Tests.Hub;
-
-public sealed class WorkerBuildInfoHubTests
-{
-    [Theory]
-    [InlineData(null, null)]
-    [InlineData("", null)]
-    [InlineData("1.2.3", null)]
-    [InlineData("1.2.3+", null)]
-    [InlineData("1.2.3+abc1234", "abc1234")]
-    // MinVer's own pre-release metadata can already contain a '+' (e.g. "+devsha"); our
-    // SourceRevisionId is appended last, so only the segment after the LAST '+' is authoritative.
-    [InlineData("0.0.0-alpha.0.4+devsha+f5b1a2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9", "f5b1a2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9")]
-    public void ParseBuildSha_ExtractsSegmentAfterLastPlus(string? informationalVersion, string? expected)
-    {
-        Assert.Equal(expected, WorkerHub.ParseBuildSha(informationalVersion));
-    }
-
-    [Fact]
-    public void GetWorkerBuildInfo_ReturnsDto()
-    {
-        var hub = new WorkerHub(
-            null!, null!, null!, null!, null!, null!,
-            null!, null!, null!, null!, null!, null!, null!, null!, null!, null!, null!, null!, null!,
-            null!, new ClaudeDo.Worker.Online.OnlineInboxConfig(), new ClaudeDo.Worker.OnlineRefreshTokenStore(new ClaudeDo.Worker.DpapiTokenStore("unused.token")),
-            new ClaudeDo.Worker.Runner.PendingQuestionRegistry(), null!);
-
-        // No assertion on the actual SHA value (depends on the build environment) — just that
-        // the call doesn't throw and always returns a DTO, never null.
-        var info = hub.GetWorkerBuildInfo();
-        Assert.NotNull(info);
-    }
-}
diff --git a/tests/ClaudeDo.Worker.Tests/UiVm/TasksIslandViewModelPlanningTests.cs b/tests/ClaudeDo.Worker.Tests/UiVm/TasksIslandViewModelPlanningTests.cs
index f88e026a..2956b686 100644
--- a/tests/ClaudeDo.Worker.Tests/UiVm/TasksIslandViewModelPlanningTests.cs
+++ b/tests/ClaudeDo.Worker.Tests/UiVm/TasksIslandViewModelPlanningTests.cs
@@ -159,7 +159,6 @@ sealed class FakeWorkerClient : IWorkerClient
     public Task UpdateDailyNoteAsync(string id, string text) => Task.CompletedTask;
     public Task DeleteDailyNoteAsync(string id) => Task.CompletedTask;
     public Task<string> GetLastPrepLogAsync() => Task.FromResult(string.Empty);
-    public Task<WorkerBuildInfoDto?> GetWorkerBuildInfoAsync() => Task.FromResult<WorkerBuildInfoDto?>(null);
     public Task RefineTaskAsync(string taskId) => Task.CompletedTask;
     public Task<ClaudeBinDto?> GetClaudeBinAsync() => Task.FromResult<ClaudeBinDto?>(null);
     public Task<ClaudeBinDto?> SetClaudeBinAsync(string? value) => Task.FromResult<ClaudeBinDto?>(null);