feat(data): five-phase list-handler prompt with dedupe and enhance

tests/ClaudeDo.Data.Tests/PromptFilesTests.cs

@@ -52,12 +52,36 @@ public class PromptFilesTests
     }
 
     [Fact]
-    public void DefaultFor_merge_helper_is_non_empty_and_mentions_the_merge_tools()
+    public void DefaultFor_merge_helper_covers_all_five_phases()
     {
         var d = PromptFiles.DefaultFor(PromptKind.MergeHelper);
         Assert.False(string.IsNullOrWhiteSpace(d));
-        Assert.Contains("review_task", d);
-        Assert.Contains("continue_merge", d);
+        Assert.Contains("Phase 0", d);
+        Assert.Contains("Phase 1", d);
+        Assert.Contains("Phase 2", d);
+        Assert.Contains("Phase 3", d);
+        Assert.Contains("Phase 4", d);
+        Assert.Contains("Phase 5", d);
+    }
+
+    [Fact]
+    public void DefaultFor_merge_helper_names_the_tools_each_phase_needs()
+    {
+        var d = PromptFiles.DefaultFor(PromptKind.MergeHelper);
+        Assert.Contains("batch_get_tasks", d);      // phase 0
+        Assert.Contains("update_task", d);          // phase 1 + 2
+        Assert.Contains("get_app_settings", d);     // phase 3
+        Assert.Contains("update_task_status", d);   // phase 3
+        Assert.Contains("review_task", d);          // phase 4
+        Assert.Contains("continue_merge", d);       // phase 4
+        Assert.DoesNotContain("run_task_now(", d);  // single override slot — must not batch-start
+    }
+
+    [Fact]
+    public void DefaultFor_merge_helper_initial_has_repo_token()
+    {
+        var d = PromptFiles.DefaultFor(PromptKind.MergeHelperInitial);
+        Assert.Contains("{repo}", d);
     }
 
     [Fact]