diff --git a/src/ClaudeDo.App/Program.cs b/src/ClaudeDo.App/Program.cs
index 6536cde..343ea94 100644
--- a/src/ClaudeDo.App/Program.cs
+++ b/src/ClaudeDo.App/Program.cs
@@ -4,6 +4,7 @@ using ClaudeDo.Data.Git;
 using ClaudeDo.Releases;
 using ClaudeDo.Ui;
 using ClaudeDo.Ui.Services;
+using ClaudeDo.Ui.Services.Interfaces;
 using ClaudeDo.Ui.ViewModels;
 using ClaudeDo.Ui.ViewModels.Islands;
 using ClaudeDo.Ui.ViewModels.Modals;
@@ -100,6 +101,7 @@ sealed class Program
         sc.AddTransient<WorktreesOverviewModalViewModel>();
         sc.AddTransient<Func<WorktreesOverviewModalViewModel>>(sp => () => sp.GetRequiredService<WorktreesOverviewModalViewModel>());
         sc.AddSingleton<IPrimeScheduleApi, WorkerPrimeScheduleApi>();
+        sc.AddSingleton<INotesApi, WorkerNotesApi>();
         sc.AddTransient<PrimeClaudeTabViewModel>();
         sc.AddTransient<SettingsModalViewModel>();
         sc.AddTransient<MergeModalViewModel>();
diff --git a/src/ClaudeDo.Ui/Services/Interfaces/INotesApi.cs b/src/ClaudeDo.Ui/Services/Interfaces/INotesApi.cs
new file mode 100644
index 0000000..f5e121d
--- /dev/null
+++ b/src/ClaudeDo.Ui/Services/Interfaces/INotesApi.cs
@@ -0,0 +1,11 @@
+using ClaudeDo.Ui.Services;
+
+namespace ClaudeDo.Ui.Services.Interfaces;
+
+public interface INotesApi
+{
+    Task<List<DailyNoteDto>> ListAsync(DateOnly day);
+    Task<DailyNoteDto?> AddAsync(DateOnly day, string text);
+    Task UpdateAsync(string id, string text);
+    Task DeleteAsync(string id);
+}
diff --git a/src/ClaudeDo.Ui/Services/WorkerNotesApi.cs b/src/ClaudeDo.Ui/Services/WorkerNotesApi.cs
new file mode 100644
index 0000000..f63768b
--- /dev/null
+++ b/src/ClaudeDo.Ui/Services/WorkerNotesApi.cs
@@ -0,0 +1,13 @@
+using ClaudeDo.Ui.Services.Interfaces;
+
+namespace ClaudeDo.Ui.Services;
+
+public sealed class WorkerNotesApi : INotesApi
+{
+    private readonly WorkerClient _client;
+    public WorkerNotesApi(WorkerClient client) => _client = client;
+    public Task<List<DailyNoteDto>> ListAsync(DateOnly day) => _client.GetDailyNotesAsync(day);
+    public Task<DailyNoteDto?> AddAsync(DateOnly day, string text) => _client.AddDailyNoteAsync(day, text);
+    public Task UpdateAsync(string id, string text) => _client.UpdateDailyNoteAsync(id, text);
+    public Task DeleteAsync(string id) => _client.DeleteDailyNoteAsync(id);
+}