refactor: collapse single-implementation interfaces

Nine interfaces had exactly one implementation and no test double — they existed
only to be named twice in a DI registration: IFindingsStore, IFindingsStoreLocator,
IPrimeScheduleSignal, IRefineRunner, IWeekReportService, IMergeCoordinator,
IMissionControlPane, IOnlineLoginService, ITaskListFilter. Consumers now depend on
the concrete type; the DTO records that shared those files moved next to their
implementation. IInteractiveLaunchSpecService stays — it carries 54 lines of
contract documentation, which is not ceremony.

IMergeCoordinator in particular had a redundant null object: MergeCoordinator with
a null Handler already no-ops, and every test used the real class with Handler set.

Filtering/ collapses from 8 files to 1. ITaskListFilter and TaskListFilterBase were
a double abstraction over four predicates, with MatchesAsContext => false declared
in both. SmartFlagFilter also compiled its expression twice (its own _flag plus the
inherited Matches cache) — it now uses the cache.

StaticTokenAuthProvider was in src but production uses ZitadelAuthProvider; it is
a test double, so it moves to the test project. Its own test goes away with it.

src/ClaudeDo.App/Program.cs

@@ -128,7 +128,6 @@ sealed class Program
 
         // Conflict-merge coordinator: single seam the shell wires to its resolver entry.
         sc.AddSingleton<MergeCoordinator>();
-        sc.AddSingleton<IMergeCoordinator>(sp => sp.GetRequiredService<MergeCoordinator>());
 
         // ViewModels
         sc.AddTransient<DiffViewerViewModel>();
@@ -139,7 +138,7 @@ sealed class Program
         sc.AddTransient<MergeHelperSelectionModalViewModel>();
         sc.AddSingleton<IPrimeScheduleApi, WorkerPrimeScheduleApi>();
         sc.AddSingleton<INotesApi, WorkerNotesApi>();
-        sc.AddSingleton<IOnlineLoginService, OnlineLoginService>();
+        sc.AddSingleton<OnlineLoginService>();
         sc.AddTransient<PrimeClaudeTabViewModel>();
         sc.AddTransient<SettingsModalViewModel>();
         sc.AddTransient<MergeModalViewModel>();
@@ -173,7 +172,7 @@ sealed class Program
                 sp.GetRequiredService<IWorkerClient>(),
                 sp,
                 sp.GetRequiredService<INotesApi>(),
-                sp.GetRequiredService<IMergeCoordinator>()));
+                sp.GetRequiredService<MergeCoordinator>()));
         sc.AddSingleton<UsagePillViewModel>(sp =>
             new UsagePillViewModel(sp.GetRequiredService<IWorkerClient>()));
         sc.AddSingleton<MissionControlViewModel>(sp =>

src/ClaudeDo.Data/Filtering/Filters/ReviewFilter.cs

@@ -1,12 +0,0 @@
-using System.Linq.Expressions;
-using ClaudeDo.Data.Models;
-using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
-
-namespace ClaudeDo.Data.Filtering.Filters;
-
-public sealed class ReviewFilter : TaskListFilterBase
-{
-    public override string Id => "virtual:review";
-    protected override Expression<Func<TaskEntity, bool>> MatchExpr => t => t.Status == TaskStatus.WaitingForReview;
-    public override bool ShouldCount(TaskEntity t) => Matches(t);
-}

src/ClaudeDo.Data/Filtering/Filters/SmartFlagFilter.cs

@@ -1,18 +0,0 @@
-using System.Linq.Expressions;
-using ClaudeDo.Data.Models;
-using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
-
-namespace ClaudeDo.Data.Filtering.Filters;
-
-/// <summary>
-/// Filter for a smart list keyed off a boolean/nullable task flag
-/// (My Day, Important, Planned). Counts only non-done matches.
-/// </summary>
-public sealed class SmartFlagFilter(string id, Expression<Func<TaskEntity, bool>> flag) : TaskListFilterBase
-{
-    private readonly Func<TaskEntity, bool> _flag = flag.Compile();
-
-    public override string Id => id;
-    protected override Expression<Func<TaskEntity, bool>> MatchExpr => flag;
-    public override bool ShouldCount(TaskEntity t) => _flag(t) && t.Status != TaskStatus.Done;
-}

src/ClaudeDo.Data/Filtering/Filters/StatusFilter.cs

@@ -1,19 +0,0 @@
-using System.Linq.Expressions;
-using ClaudeDo.Data.Models;
-using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
-
-namespace ClaudeDo.Data.Filtering.Filters;
-
-/// <summary>
-/// Virtual list filter matching tasks by a single status (Queued, Running).
-/// Planning parents appear contextually when they host a matching child.
-/// </summary>
-public sealed class StatusFilter(string id, TaskStatus status) : TaskListFilterBase
-{
-    public override string Id => id;
-    protected override Expression<Func<TaskEntity, bool>> MatchExpr => t => t.Status == status;
-    public override bool ShouldCount(TaskEntity t) => t.Status == status;
-    public override bool MatchesAsContext(TaskEntity t, IReadOnlyList<TaskEntity> all) =>
-        PlanningRules.IsPlanningParent(t) &&
-        PlanningRules.HasMatchingChild(t, all, c => c.Status == status);
-}

src/ClaudeDo.Data/Filtering/Filters/TaskListFilterBase.cs

@@ -1,27 +0,0 @@
-using System.Linq.Expressions;
-using ClaudeDo.Data.Models;
-
-namespace ClaudeDo.Data.Filtering.Filters;
-
-/// <summary>
-/// Base for <see cref="ITaskListFilter"/> implementations: subclasses express their
-/// primary-match condition once as an expression tree (<see cref="MatchExpr"/>), which
-/// doubles as a SQL-translatable predicate (<see cref="MatchExpression"/>) and, compiled
-/// on first use, as the in-memory <see cref="Matches"/> predicate.
-/// </summary>
-public abstract class TaskListFilterBase : ITaskListFilter
-{
-    private Func<TaskEntity, bool>? _compiled;
-
-    public abstract string Id { get; }
-
-    protected abstract Expression<Func<TaskEntity, bool>> MatchExpr { get; }
-
-    public Expression<Func<TaskEntity, bool>> MatchExpression => MatchExpr;
-
-    public bool Matches(TaskEntity t) => (_compiled ??= MatchExpr.Compile())(t);
-
-    public abstract bool ShouldCount(TaskEntity t);
-
-    public virtual bool MatchesAsContext(TaskEntity t, IReadOnlyList<TaskEntity> all) => false;
-}

src/ClaudeDo.Data/Filtering/Filters/UserListFilter.cs

@@ -1,24 +0,0 @@
-using System.Linq.Expressions;
-using ClaudeDo.Data.Models;
-using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
-
-namespace ClaudeDo.Data.Filtering.Filters;
-
-/// <summary>
-/// Filter for any user-defined list. Constructed on demand from the list id —
-/// one instance per list.
-/// </summary>
-public sealed class UserListFilter : TaskListFilterBase
-{
-    private readonly string _listId;
-
-    public UserListFilter(string listId)
-    {
-        _listId = listId;
-        Id = $"user:{listId}";
-    }
-
-    public override string Id { get; }
-    protected override Expression<Func<TaskEntity, bool>> MatchExpr => t => t.ListId == _listId;
-    public override bool ShouldCount(TaskEntity t) => t.ListId == _listId && t.Status != TaskStatus.Done;
-}

src/ClaudeDo.Data/Filtering/Interfaces/ITaskListFilter.cs

@@ -1,30 +0,0 @@
-using System.Linq.Expressions;
-using ClaudeDo.Data.Models;
-
-namespace ClaudeDo.Data.Filtering;
-
-/// <summary>
-/// Strategy that defines which tasks belong to a single list. One implementation
-/// per list kind; consumers (counters, list loader) ask the registry for the
-/// right strategy and never branch on the list id themselves.
-/// </summary>
-public interface ITaskListFilter
-{
-    /// <summary>The list id this filter applies to (e.g. "virtual:queued", "user:abc").</summary>
-    string Id { get; }
-
-    /// <summary>True if <paramref name="t"/> is a primary citizen of this list — appears as a row.</summary>
-    bool Matches(TaskEntity t);
-
-    /// <summary>The primary-match predicate as an expression tree, so EF Core can push it into SQL.</summary>
-    Expression<Func<TaskEntity, bool>> MatchExpression { get; }
-
-    /// <summary>True if <paramref name="t"/> should be counted in this list's badge.</summary>
-    bool ShouldCount(TaskEntity t);
-
-    /// <summary>
-    /// True if <paramref name="t"/> is shown as a contextual row (not a primary citizen,
-    /// but appears to host children that match). Default: nothing extra.
-    /// </summary>
-    bool MatchesAsContext(TaskEntity t, IReadOnlyList<TaskEntity> all) => false;
-}

src/ClaudeDo.Data/Filtering/TaskListFilterRegistry.cs

@@ -1,8 +1,84 @@
-using ClaudeDo.Data.Filtering.Filters;
+using System.Linq.Expressions;
+using ClaudeDo.Data.Models;
 using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
 
 namespace ClaudeDo.Data.Filtering;
 
+/// <summary>
+/// Strategy that defines which tasks belong to a single list. One subclass per list kind;
+/// consumers (counters, list loader) ask the registry for the right strategy and never branch
+/// on the list id themselves.
+///
+/// Subclasses express their primary-match condition once as an expression tree
+/// (<see cref="MatchExpression"/>), which doubles as a SQL-translatable predicate for EF Core
+/// and, compiled on first use, as the in-memory <see cref="Matches"/> predicate.
+/// </summary>
+public abstract class TaskListFilter
+{
+    private Func<TaskEntity, bool>? _compiled;
+
+    /// <summary>The list id this filter applies to (e.g. "virtual:queued", "user:abc").</summary>
+    public abstract string Id { get; }
+
+    /// <summary>The primary-match predicate as an expression tree, so EF Core can push it into SQL.</summary>
+    public abstract Expression<Func<TaskEntity, bool>> MatchExpression { get; }
+
+    /// <summary>True if <paramref name="t"/> is a primary citizen of this list — appears as a row.</summary>
+    public bool Matches(TaskEntity t) => (_compiled ??= MatchExpression.Compile())(t);
+
+    /// <summary>True if <paramref name="t"/> should be counted in this list's badge.</summary>
+    public abstract bool ShouldCount(TaskEntity t);
+
+    /// <summary>
+    /// True if <paramref name="t"/> is shown as a contextual row (not a primary citizen,
+    /// but appears to host children that match). Default: nothing extra.
+    /// </summary>
+    public virtual bool MatchesAsContext(TaskEntity t, IReadOnlyList<TaskEntity> all) => false;
+}
+
+/// <summary>
+/// Filter for a smart list keyed off a boolean/nullable task flag
+/// (My Day, Important, Planned). Counts only non-done matches.
+/// </summary>
+public sealed class SmartFlagFilter(string id, Expression<Func<TaskEntity, bool>> flag) : TaskListFilter
+{
+    public override string Id => id;
+    public override Expression<Func<TaskEntity, bool>> MatchExpression => flag;
+    public override bool ShouldCount(TaskEntity t) => Matches(t) && t.Status != TaskStatus.Done;
+}
+
+/// <summary>
+/// Virtual list filter matching tasks by a single status (Queued, Running).
+/// Planning parents appear contextually when they host a matching child.
+/// </summary>
+public sealed class StatusFilter(string id, TaskStatus status) : TaskListFilter
+{
+    public override string Id => id;
+    public override Expression<Func<TaskEntity, bool>> MatchExpression => t => t.Status == status;
+    public override bool ShouldCount(TaskEntity t) => t.Status == status;
+    public override bool MatchesAsContext(TaskEntity t, IReadOnlyList<TaskEntity> all) =>
+        PlanningRules.IsPlanningParent(t) &&
+        PlanningRules.HasMatchingChild(t, all, c => c.Status == status);
+}
+
+public sealed class ReviewFilter : TaskListFilter
+{
+    public override string Id => "virtual:review";
+    public override Expression<Func<TaskEntity, bool>> MatchExpression => t => t.Status == TaskStatus.WaitingForReview;
+    public override bool ShouldCount(TaskEntity t) => Matches(t);
+}
+
+/// <summary>
+/// Filter for any user-defined list. Constructed on demand from the list id —
+/// one instance per list.
+/// </summary>
+public sealed class UserListFilter(string listId) : TaskListFilter
+{
+    public override string Id { get; } = $"user:{listId}";
+    public override Expression<Func<TaskEntity, bool>> MatchExpression => t => t.ListId == listId;
+    public override bool ShouldCount(TaskEntity t) => t.ListId == listId && t.Status != TaskStatus.Done;
+}
+
 /// <summary>
 /// Resolves a list id (e.g. "virtual:queued", "user:abc") to the filter that
 /// owns its semantics. Smart and virtual filters are singletons; user-list
@@ -12,8 +88,8 @@ public sealed class TaskListFilterRegistry
 {
     public const string UserListPrefix = "user:";
 
-    private static readonly IReadOnlyDictionary<string, ITaskListFilter> BuiltIn =
-        new Dictionary<string, ITaskListFilter>(StringComparer.Ordinal)
+    private static readonly IReadOnlyDictionary<string, TaskListFilter> BuiltIn =
+        new Dictionary<string, TaskListFilter>(StringComparer.Ordinal)
         {
             ["smart:my-day"]    = new SmartFlagFilter("smart:my-day", t => t.IsMyDay),
             ["smart:important"] = new SmartFlagFilter("smart:important", t => t.IsStarred),
@@ -26,7 +102,7 @@ public sealed class TaskListFilterRegistry
     /// <summary>
     /// Resolve a filter for a list id, or null if the id is unknown.
     /// </summary>
-    public ITaskListFilter? Resolve(string listId)
+    public TaskListFilter? Resolve(string listId)
     {
         if (BuiltIn.TryGetValue(listId, out var f)) return f;
         if (listId.StartsWith(UserListPrefix, StringComparison.Ordinal))

src/ClaudeDo.Ui/Services/Interfaces/IOnlineLoginService.cs

@@ -1,10 +0,0 @@
-namespace ClaudeDo.Ui.Services;
-
-public sealed record OnlineLoginResult(bool Success, string? RefreshToken, string? Error, string? Warning = null);
-
-public interface IOnlineLoginService
-{
-    Task<OnlineLoginResult> LoginAsync(
-        string authority, string clientId, string scope, string redirectUri,
-        CancellationToken ct = default);
-}

src/ClaudeDo.Ui/Services/MergeCoordinator.cs

@@ -6,20 +6,12 @@ namespace ClaudeDo.Ui.Services;
 /// <summary>
 /// Single entry point for handing a conflicting merge to the in-app 3-pane resolver.
 /// Replaces the per-VM <c>RequestConflictResolution</c> Func seams that used to be
-/// hand-threaded shell → details → merge-section → diff → merge-modal. The shell wires
-/// <see cref="MergeCoordinator.Handler"/> once at composition; invokers depend only on
-/// this interface (injected via DI).
-/// </summary>
-public interface IMergeCoordinator
-{
-    Task ResolveConflictAsync(string taskId, string targetBranch);
-}
-
-/// <summary>
+/// hand-threaded shell → details → merge-section → diff → merge-modal.
+///
 /// DI singleton holding the resolver entry. The holder breaks the shell↔island construction
-/// cycle: islands depend on the interface, the shell sets <see cref="Handler"/> after it is built.
+/// cycle: islands depend on this type, the shell sets <see cref="Handler"/> after it is built.
 /// </summary>
-public sealed class MergeCoordinator : IMergeCoordinator
+public sealed class MergeCoordinator
 {
     /// Set once at composition to the shell's resolver entry. Null (headless/tests) ⇒ no-op.
     public Func<string, string, Task>? Handler { get; set; }

src/ClaudeDo.Ui/Services/OnlineLoginService.cs

@@ -6,7 +6,9 @@ using Duende.IdentityModel.OidcClient.Browser;
 
 namespace ClaudeDo.Ui.Services;
 
-public sealed class OnlineLoginService : IOnlineLoginService
+public sealed record OnlineLoginResult(bool Success, string? RefreshToken, string? Error, string? Warning = null);
+
+public sealed class OnlineLoginService
 {
     public async Task<OnlineLoginResult> LoginAsync(
         string authority, string clientId, string scope, string redirectUri,

src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs

@@ -21,7 +21,7 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
     private readonly IWorkerClient _worker;
     private readonly IServiceProvider _services;
     private readonly INotesApi _notesApi;
-    private readonly IMergeCoordinator _merge;
+    private readonly MergeCoordinator _merge;
 
     // ── Section view models ───────────────────────────────────────────────────
     public AgentConfigEditorViewModel AgentSettings { get; }
@@ -325,7 +325,7 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
         IWorkerClient worker,
         IServiceProvider services,
         INotesApi notesApi,
-        IMergeCoordinator merge)
+        MergeCoordinator merge)
     {
         _dbFactory = dbFactory;
         _worker = worker;

src/ClaudeDo.Ui/ViewModels/MissionControl/ConPtyPaneViewModel.cs

@@ -11,7 +11,7 @@ namespace ClaudeDo.Ui.ViewModels.MissionControl;
 /// Claude session, or an ad-hoc/free session in a user-chosen directory (no task, <see cref="TaskId"/>
 /// is null — ad-hoc panes are never deduped, unlike task-based ones).
 /// </summary>
-public sealed partial class ConPtyPaneViewModel : ViewModelBase, IMissionControlPane, IDisposable
+public sealed partial class ConPtyPaneViewModel : ViewModelBase, IDisposable
 {
     public string? TaskId { get; }
 

src/ClaudeDo.Ui/ViewModels/MissionControl/IMissionControlPane.cs

@@ -1,11 +0,0 @@
-namespace ClaudeDo.Ui.ViewModels.MissionControl;
-
-/// <summary>
-/// Common contract for anything hosted as a pane in the Command Center — currently only
-/// <see cref="ConPtyPaneViewModel"/>, kept as its own abstraction so the grid/tabs layout
-/// toggle binds a pane collection rather than a concrete ConPTY-specific type.
-/// </summary>
-public interface IMissionControlPane
-{
-    string DisplayTitle { get; }
-}

src/ClaudeDo.Ui/ViewModels/MissionControlViewModel.cs

@@ -35,7 +35,7 @@ public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
 
     // Mirror of ConPtySessions typed as the pane abstraction so the layout toggle (grid/tabs)
     // binds one contract rather than a ConPTY-specific type.
-    public ObservableCollection<IMissionControlPane> Panes { get; } = new();
+    public ObservableCollection<ConPtyPaneViewModel> Panes { get; } = new();
 
     [ObservableProperty] private int _columnCount = 1;
 
@@ -43,7 +43,7 @@ public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
     [NotifyPropertyChangedFor(nameof(LayoutToggleLabel))]
     private bool _isFocusMode;
 
-    [ObservableProperty] private IMissionControlPane? _focusedPane;
+    [ObservableProperty] private ConPtyPaneViewModel? _focusedPane;
 
     public string LayoutToggleLabel => Loc.T(IsFocusMode ? "missionControl.overviewMode" : "missionControl.focusMode");
 
@@ -403,7 +403,7 @@ public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
             _    => 3,
         };
         OnPropertyChanged(nameof(HasPanes));
-        if (e.Action == NotifyCollectionChangedAction.Add && e.NewItems?[0] is IMissionControlPane added)
+        if (e.Action == NotifyCollectionChangedAction.Add && e.NewItems?[0] is ConPtyPaneViewModel added)
             FocusedPane = added;
         else if (e.Action == NotifyCollectionChangedAction.Remove && ReferenceEquals(FocusedPane, e.OldItems?[0]))
             FocusedPane = Panes.LastOrDefault();

src/ClaudeDo.Ui/ViewModels/Modals/MergeModalViewModel.cs

@@ -9,7 +9,7 @@ namespace ClaudeDo.Ui.ViewModels.Modals;
 public sealed partial class MergeModalViewModel : ViewModelBase
 {
     private readonly IWorkerClient _worker;
-    private readonly IMergeCoordinator _merge;
+    private readonly MergeCoordinator _merge;
 
     public string TaskId { get; set; } = "";
     public string TaskTitle { get; set; } = "";
@@ -42,7 +42,7 @@ public sealed partial class MergeModalViewModel : ViewModelBase
     /// True once a conflict has been handed off to the resolver — also a cue to close the diff window.
     public bool RoutedToResolver { get; private set; }
 
-    public MergeModalViewModel(IWorkerClient worker, IMergeCoordinator merge)
+    public MergeModalViewModel(IWorkerClient worker, MergeCoordinator merge)
     {
         _worker = worker;
         _merge = merge;

src/ClaudeDo.Ui/ViewModels/Modals/Settings/OnlineInboxSettingsViewModel.cs

@@ -8,7 +8,7 @@ namespace ClaudeDo.Ui.ViewModels.Modals.Settings;
 public sealed partial class OnlineInboxSettingsViewModel : ViewModelBase
 {
     private readonly IWorkerClient _worker;
-    private readonly IOnlineLoginService _loginService;
+    private readonly OnlineLoginService _loginService;
 
     [ObservableProperty] private bool _enabled;
     [ObservableProperty] private string _apiBaseUrl = "";
@@ -21,7 +21,7 @@ public sealed partial class OnlineInboxSettingsViewModel : ViewModelBase
     [ObservableProperty] private bool _isBusy;
     [ObservableProperty] private string _statusMessage = "";
 
-    public OnlineInboxSettingsViewModel(IWorkerClient worker, IOnlineLoginService loginService)
+    public OnlineInboxSettingsViewModel(IWorkerClient worker, OnlineLoginService loginService)
     {
         _worker = worker;
         _loginService = loginService;

src/ClaudeDo.Ui/ViewModels/Modals/SettingsModalViewModel.cs

@@ -73,7 +73,7 @@ public sealed partial class SettingsModalViewModel : ViewModelBase
     public Action? CloseAction { get; set; }
 
     public SettingsModalViewModel(IWorkerClient worker, PrimeClaudeTabViewModel prime,
-                                  IOnlineLoginService onlineLoginService,
+                                  OnlineLoginService onlineLoginService,
                                   ILocalizer localizer, AppSettings appSettings,
                                   IDbContextFactory<ClaudeDoDbContext> dbFactory)
     {

src/ClaudeDo.Ui/ViewModels/Modals/WorktreesOverviewModalViewModel.cs

@@ -69,7 +69,7 @@ public sealed partial class WorktreesOverviewModalViewModel : ViewModelBase
 {
     private readonly IWorkerClient _worker;
     private readonly Func<DiffViewerViewModel> _diffVmFactory;
-    private readonly IMergeCoordinator _merge;
+    private readonly MergeCoordinator _merge;
 
     [ObservableProperty] private string? _listIdFilter;
     [ObservableProperty] private string _title = "Worktrees";
@@ -104,7 +104,7 @@ public sealed partial class WorktreesOverviewModalViewModel : ViewModelBase
     public Func<MergeModalViewModel>? ResolveMergeVm { get; set; }
     public Func<MergeModalViewModel, Task>? ShowMergeAction { get; set; }
 
-    public WorktreesOverviewModalViewModel(IWorkerClient worker, Func<DiffViewerViewModel> diffVmFactory, IMergeCoordinator merge)
+    public WorktreesOverviewModalViewModel(IWorkerClient worker, Func<DiffViewerViewModel> diffVmFactory, MergeCoordinator merge)
     {
         _worker = worker;
         _diffVmFactory = diffVmFactory;

src/ClaudeDo.Ui/Views/MissionControl/MissionControlView.axaml

@@ -75,7 +75,7 @@
                     SelectedItem="{Binding FocusedPane}"
                     IsVisible="{Binding IsFocusMode}">
           <TabControl.ItemTemplate>
-            <DataTemplate x:DataType="vmm:IMissionControlPane">
+            <DataTemplate x:DataType="vmm:ConPtyPaneViewModel">
               <TextBlock Text="{Binding DisplayTitle}" TextTrimming="CharacterEllipsis" MaxWidth="160" />
             </DataTemplate>
           </TabControl.ItemTemplate>

src/ClaudeDo.Worker/External/FindingsMcpTools.cs

@@ -11,10 +11,10 @@ public sealed record SaveFindingResult(
 [McpServerToolType]
 public sealed class FindingsMcpTools
 {
-    private readonly IFindingsStore _store;
-    private readonly IFindingsStoreLocator _locator;
+    private readonly FindingsStore _store;
+    private readonly FindingsStoreLocator _locator;
 
-    public FindingsMcpTools(IFindingsStore store, IFindingsStoreLocator locator)
+    public FindingsMcpTools(FindingsStore store, FindingsStoreLocator locator)
     {
         _store = store;
         _locator = locator;

src/ClaudeDo.Worker/Findings/FindingsStore.cs

@@ -4,13 +4,29 @@ using ClaudeDo.Worker.Git;
 
 namespace ClaudeDo.Worker.Findings;
 
+/// <summary>One durable finding, as handed in by a caller. Git and DB lookups happen above this layer.</summary>
+public sealed record FindingInput(
+    string Slug,
+    string Title,
+    string Body,
+    string Scope,
+    string SourceTaskId,
+    string VerifiedAgainst);
+
+public sealed record SaveFindingOutcome(
+    string Slug,
+    string Path,
+    bool Created,
+    int TotalFindings,
+    bool NearCapacity);
+
 /// <summary>
 /// Owns &lt;working-dir&gt;/.claudedo/ — one markdown file per finding plus a rebuilt INDEX.md.
 /// Pure filesystem: the caller supplies the head commit and source task id.
 /// INDEX.md is always regenerated from the files on disk, never patched, so findings the user
 /// deleted or renamed by hand disappear from the index on the next write.
 /// </summary>
-public sealed class FindingsStore : IFindingsStore
+public sealed class FindingsStore
 {
     /// <summary>INDEX.md is read by every run; past this many entries it stops paying for itself.</summary>
     public const int WarnThreshold = 80;

src/ClaudeDo.Worker/Findings/FindingsStoreLocator.cs

@@ -3,12 +3,15 @@ using ClaudeDo.Data.Repositories;
 
 namespace ClaudeDo.Worker.Findings;
 
+/// <summary>The main checkout a finding belongs to, plus whether its store is committed with the repo.</summary>
+public sealed record FindingsTarget(string ListId, string ListName, string WorkingDir, bool Tracked);
+
 /// <summary>
 /// Maps an MCP call to the project whose findings store it targets. Always resolves to the list's
 /// WorkingDir — the main checkout — even when the caller runs inside a worktree, because concurrent
 /// writes into worktree copies would produce INDEX.md merge conflicts.
 /// </summary>
-public sealed class FindingsStoreLocator : IFindingsStoreLocator
+public sealed class FindingsStoreLocator
 {
     private readonly TaskRepository _tasks;
     private readonly ListRepository _lists;

src/ClaudeDo.Worker/Findings/Interfaces/IFindingsStore.cs

@@ -1,22 +0,0 @@
-namespace ClaudeDo.Worker.Findings;
-
-/// <summary>One durable finding, as handed in by a caller. Git and DB lookups happen above this layer.</summary>
-public sealed record FindingInput(
-    string Slug,
-    string Title,
-    string Body,
-    string Scope,
-    string SourceTaskId,
-    string VerifiedAgainst);
-
-public sealed record SaveFindingOutcome(
-    string Slug,
-    string Path,
-    bool Created,
-    int TotalFindings,
-    bool NearCapacity);
-
-public interface IFindingsStore
-{
-    Task<SaveFindingOutcome> SaveAsync(string workingDir, FindingInput input, CancellationToken ct, bool tracked = false);
-}

src/ClaudeDo.Worker/Findings/Interfaces/IFindingsStoreLocator.cs

@@ -1,10 +0,0 @@
-namespace ClaudeDo.Worker.Findings;
-
-/// <summary>The main checkout a finding belongs to, plus whether its store is committed with the repo.</summary>
-public sealed record FindingsTarget(string ListId, string ListName, string WorkingDir, bool Tracked);
-
-public interface IFindingsStoreLocator
-{
-    Task<FindingsTarget> ResolveForTaskAsync(string taskId, CancellationToken ct);
-    Task<FindingsTarget> ResolveForListAsync(string listIdOrName, CancellationToken ct);
-}

src/ClaudeDo.Worker/Hub/WorkerHub.cs

@@ -229,11 +229,11 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
     private readonly PlanningAggregator _planningAggregator;
     private readonly PlanningMergeOrchestrator _planningMergeOrchestrator;
     private readonly PlanningChainCoordinator _planningChain;
-    private readonly IPrimeScheduleSignal _primeSignal;
+    private readonly PrimeScheduleSignal _primeSignal;
     private readonly IPrimeRunner _primeRunner;
     private readonly ITaskStateService _state;
-    private readonly IWeekReportService _report;
-    private readonly IRefineRunner _refineRunner;
+    private readonly WeekReportService _report;
+    private readonly RefineRunner _refineRunner;
     private readonly WorkerConfig _cfg;
     private readonly OnlineInboxConfig _onlineInboxConfig;
     private readonly OnlineTokenStore _onlineTokenStore;
@@ -264,11 +264,11 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
         PlanningAggregator planningAggregator,
         PlanningMergeOrchestrator planningMergeOrchestrator,
         PlanningChainCoordinator planningChain,
-        IPrimeScheduleSignal primeSignal,
+        PrimeScheduleSignal primeSignal,
         IPrimeRunner primeRunner,
         ITaskStateService state,
-        IWeekReportService report,
-        IRefineRunner refineRunner,
+        WeekReportService report,
+        RefineRunner refineRunner,
         WorkerConfig cfg,
         OnlineInboxConfig onlineInboxConfig,
         OnlineTokenStore onlineTokenStore,

src/ClaudeDo.Worker/Online/StaticTokenAuthProvider.cs

@@ -1,24 +0,0 @@
-using ClaudeDo.Worker.Online.Interfaces;
-
-namespace ClaudeDo.Worker.Online;
-
-/// <summary>
-/// Simple <see cref="IOnlineAuthProvider"/> that returns a fixed token supplied at construction.
-/// Used as the default DI registration until <c>ZitadelAuthProvider</c> is wired (Phase 2).
-/// Also serves as the test double.
-/// </summary>
-public sealed class StaticTokenAuthProvider : IOnlineAuthProvider
-{
-    private readonly string? _token;
-
-    public StaticTokenAuthProvider(string? token = null)
-    {
-        _token = token;
-    }
-
-    public Task<string?> GetAccessTokenAsync(CancellationToken ct = default)
-        => Task.FromResult(_token);
-
-    public Task<string?> GetAccessTokenAsync(bool forceRefresh, CancellationToken ct = default)
-        => Task.FromResult(_token);
-}

src/ClaudeDo.Worker/Planning/WindowsTerminalLauncher.cs

@@ -86,7 +86,7 @@ public sealed class WindowsTerminalLauncher : ITerminalLauncher
         return Task.CompletedTask;
     }
 
-    // The raw claude CLI args for a --resume launch, shared with InteractiveLaunchSpecService
+    // The raw claude CLI args for a --resume launch, shared with IInteractiveLaunchSpecService
     // (which needs the bare Exe/Args pair for a ConPTY host, not a wrapped pwsh command line).
     internal static IReadOnlyList<string> BuildResumeArgs(string claudeSessionId) =>
         new[] { "--resume", claudeSessionId };
@@ -99,7 +99,7 @@ public sealed class WindowsTerminalLauncher : ITerminalLauncher
         BuildPwshCommand(claudePath, BuildPlanningStartArgs(ctx));
 
     // The raw claude CLI args for an interactive planning START, shared with the embedded-ConPTY
-    // planning path (InteractiveLaunchSpecService), which needs the bare Exe/Args pair rather than
+    // planning path (IInteractiveLaunchSpecService), which needs the bare Exe/Args pair rather than
     // a pwsh-wrapped command line. Arg order matters: variadic flags (--allowedTools, --add-dir)
     // come first; the single-line kickoff prompt is positional, so it must follow a single-value
     // flag (--append-system-prompt-file) or a variadic flag would swallow it.
@@ -176,7 +176,7 @@ public sealed class WindowsTerminalLauncher : ITerminalLauncher
             ?? throw new TerminalLaunchException("Failed to start Windows Terminal process.");
     }
 
-    // Not private: reused by InteractiveLaunchSpecService to resolve the claude executable
+    // Not private: reused by IInteractiveLaunchSpecService to resolve the claude executable
     // for a ConPTY-hosted launch spec the same way a wt-launched terminal resolves it.
     internal static string? Resolve(string pathOrName)
     {

src/ClaudeDo.Worker/Prime/Interfaces/IPrimeScheduleSignal.cs

@@ -1,6 +0,0 @@
-namespace ClaudeDo.Worker.Prime;
-public interface IPrimeScheduleSignal
-{
-    void Signal();
-    CancellationToken CurrentToken { get; }
-}

src/ClaudeDo.Worker/Prime/PrimeScheduleSignal.cs

@@ -1,6 +1,6 @@
 namespace ClaudeDo.Worker.Prime;
 
-public sealed class PrimeScheduleSignal : IPrimeScheduleSignal, IDisposable
+public sealed class PrimeScheduleSignal : IDisposable
 {
     private CancellationTokenSource _cts = new();
     private readonly object _lock = new();

src/ClaudeDo.Worker/Prime/PrimeScheduler.cs

@@ -21,7 +21,7 @@ public sealed class PrimeScheduler : BackgroundService
     private readonly IDbContextFactory<ClaudeDoDbContext> _dbFactory;
     private readonly IPrimeRunner _runner;
     private readonly IPrimeClock _clock;
-    private readonly IPrimeScheduleSignal _signal;
+    private readonly PrimeScheduleSignal _signal;
     private readonly IPrimeBroadcaster _broadcaster;
     private readonly PrimeSchedulerOptions _options;
     private readonly ILogger<PrimeScheduler> _logger;
@@ -30,7 +30,7 @@ public sealed class PrimeScheduler : BackgroundService
         IDbContextFactory<ClaudeDoDbContext> dbFactory,
         IPrimeRunner runner,
         IPrimeClock clock,
-        IPrimeScheduleSignal signal,
+        PrimeScheduleSignal signal,
         IPrimeBroadcaster broadcaster,
         PrimeSchedulerOptions options,
         ILogger<PrimeScheduler> logger)

src/ClaudeDo.Worker/Program.cs

@@ -67,7 +67,7 @@ builder.Services.AddDbContextFactory<ClaudeDoDbContext>(opt =>
 builder.Services.AddSingleton(cfg);
 builder.Services.AddSingleton<AttachmentStore>();
 // Singleton so the always-on and in-task MCP servers share the same index write lock.
-builder.Services.AddSingleton<IFindingsStore, FindingsStore>();
+builder.Services.AddSingleton<FindingsStore>();
 builder.Services.AddHostedService<StaleTaskRecovery>();
 builder.Services.AddHostedService<OrphanRecovery>();
 builder.Services.AddHostedService<AttachmentOrphanRecovery>();
@@ -140,7 +140,7 @@ builder.Services.AddSingleton<OverrideSlotService>();
 builder.Services.AddSingleton<IClaudeHistoryReader>(_ =>
     new ClaudeHistoryReader(Path.Combine(
         Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".claude", "projects")));
-builder.Services.AddSingleton<IWeekReportService, WeekReportService>();
+builder.Services.AddSingleton<WeekReportService>();
 
 // Usage
 builder.Services.AddSingleton<ITranscriptUsageReader, TranscriptUsageReader>();
@@ -154,14 +154,13 @@ builder.Services.AddSingleton<TokenTrackerService>();
 // Prime Claude
 builder.Services.AddSingleton<IPrimeClock, PrimeClock>();
 builder.Services.AddSingleton<PrimeScheduleSignal>();
-builder.Services.AddSingleton<IPrimeScheduleSignal>(sp => sp.GetRequiredService<PrimeScheduleSignal>());
 builder.Services.AddSingleton<IPrimeRunner, PrimeRunner>();
 builder.Services.AddSingleton(PrimeSchedulerOptions.Default);
 builder.Services.AddSingleton<IPrimeBroadcaster>(sp => sp.GetRequiredService<HubBroadcaster>());
 builder.Services.AddHostedService<PrimeScheduler>();
 
 // Refine
-builder.Services.AddSingleton<IRefineRunner, RefineRunner>();
+builder.Services.AddSingleton<RefineRunner>();
 builder.Services.AddSingleton<IRefineBroadcaster>(sp => sp.GetRequiredService<HubBroadcaster>());
 
 // "Continue on session limit reset" toggle — depends on UsageState, registered below.
@@ -199,7 +198,7 @@ builder.Services.AddScoped<ClaudeDoDbContext>(sp =>
 builder.Services.AddScoped<TaskRepository>();
 builder.Services.AddScoped<ListRepository>();
 builder.Services.AddScoped<PlanningMcpService>();
-builder.Services.AddScoped<IFindingsStoreLocator, FindingsStoreLocator>();
+builder.Services.AddScoped<FindingsStoreLocator>();
 builder.Services.AddScoped<TaskRunFindingsMcpTools>();
 builder.Services.AddMcpServer()
     .WithHttpTransport()
@@ -339,8 +338,8 @@ if (cfg.ExternalMcpPort > 0)
     externalBuilder.Services.AddSingleton(app.Services.GetRequiredService<AttachmentStore>());
     externalBuilder.Services.AddScoped<TaskAttachmentRepository>();
     externalBuilder.Services.AddScoped<AttachmentMcpTools>();
-    externalBuilder.Services.AddSingleton<IFindingsStore>(app.Services.GetRequiredService<IFindingsStore>());
-    externalBuilder.Services.AddScoped<IFindingsStoreLocator, FindingsStoreLocator>();
+    externalBuilder.Services.AddSingleton(app.Services.GetRequiredService<FindingsStore>());
+    externalBuilder.Services.AddScoped<FindingsStoreLocator>();
     externalBuilder.Services.AddScoped<FindingsMcpTools>();
     externalBuilder.Services.AddMcpServer()
         .WithHttpTransport()

src/ClaudeDo.Worker/Refine/Interfaces/IRefineRunner.cs

@@ -1,8 +0,0 @@
-namespace ClaudeDo.Worker.Refine;
-
-public interface IRefineRunner
-{
-    Task<RefineRunOutcome> RefineAsync(string taskId, CancellationToken ct);
-}
-
-public sealed record RefineRunOutcome(bool Success, string Message);

src/ClaudeDo.Worker/Refine/RefineRunner.cs

@@ -7,7 +7,9 @@ using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
 
 namespace ClaudeDo.Worker.Refine;
 
-public sealed class RefineRunner : IRefineRunner
+public sealed record RefineRunOutcome(bool Success, string Message);
+
+public sealed class RefineRunner
 {
     private static readonly TimeSpan RunTimeout = TimeSpan.FromMinutes(5);
     private const int MaxTurns = 5;

src/ClaudeDo.Worker/Report/Interfaces/IWeekReportService.cs

@@ -1,7 +0,0 @@
-namespace ClaudeDo.Worker.Report.Interfaces;
-
-public interface IWeekReportService
-{
-    Task<string?> GetStoredAsync(DateOnly start, DateOnly end, CancellationToken ct = default);
-    Task<string> GenerateAsync(DateOnly start, DateOnly end, CancellationToken ct = default);
-}

src/ClaudeDo.Worker/Report/WeekReportService.cs

@@ -8,7 +8,7 @@ using Microsoft.Extensions.Logging;
 
 namespace ClaudeDo.Worker.Report;
 
-public sealed class WeekReportService : IWeekReportService
+public sealed class WeekReportService
 {
     private static readonly string[] DefaultExcludes = { @"C:\Private" };
     private const string NoActivity = "_No activity in this period._";

src/ClaudeDo.Worker/Runner/TaskRunFindingsMcpTools.cs

@@ -11,12 +11,12 @@ public sealed record SaveTaskFindingResult(
 [McpServerToolType]
 public sealed class TaskRunFindingsMcpTools
 {
-    private readonly IFindingsStore _store;
-    private readonly IFindingsStoreLocator _locator;
+    private readonly FindingsStore _store;
+    private readonly FindingsStoreLocator _locator;
     private readonly TaskRunMcpContextAccessor _ctx;
 
     public TaskRunFindingsMcpTools(
-        IFindingsStore store, IFindingsStoreLocator locator, TaskRunMcpContextAccessor ctx)
+        FindingsStore store, FindingsStoreLocator locator, TaskRunMcpContextAccessor ctx)
     {
         _store = store;
         _locator = locator;