feat(worker): session skills SignalR surface + per-level persistence

tests/ClaudeDo.Worker.Tests/Repositories/AppSettingsRepositoryTests.cs

@@ -72,6 +72,43 @@ public class AppSettingsRepositoryTests : IDisposable
         Assert.Null(row.CentralWorktreeRoot);
     }
 
+    [Fact]
+    public async Task UpdateAsync_Persists_SessionSkills_Json()
+    {
+        using (var ctx = _db.CreateContext())
+        {
+            var repo = new AppSettingsRepository(ctx);
+            await repo.UpdateAsync(new AppSettingsEntity
+            {
+                SessionSkills = "[\"ponytail\",\"ponytail-help\"]",
+            });
+        }
+
+        using var readCtx = _db.CreateContext();
+        var row = await new AppSettingsRepository(readCtx).GetAsync();
+        Assert.Equal("[\"ponytail\",\"ponytail-help\"]", row.SessionSkills);
+    }
+
+    [Fact]
+    public async Task UpdateAsync_Blank_SessionSkills_Stored_As_Null()
+    {
+        using (var ctx = _db.CreateContext())
+        {
+            var repo = new AppSettingsRepository(ctx);
+            await repo.UpdateAsync(new AppSettingsEntity { SessionSkills = "[\"a\"]" });
+        }
+
+        using (var ctx = _db.CreateContext())
+        {
+            var repo = new AppSettingsRepository(ctx);
+            await repo.UpdateAsync(new AppSettingsEntity { SessionSkills = null });
+        }
+
+        using var readCtx = _db.CreateContext();
+        var row = await new AppSettingsRepository(readCtx).GetAsync();
+        Assert.Null(row.SessionSkills);
+    }
+
     [Fact]
     public async Task DailyPrepMaxTasks_defaults_to_5_and_persists()
     {

tests/ClaudeDo.Worker.Tests/Repositories/ListRepositoryConfigTests.cs

@@ -60,6 +60,42 @@ public sealed class ListRepositoryConfigTests : IDisposable
         Assert.Equal("haiku-4-5", fetched.Model);
     }
 
+    [Fact]
+    public async Task SetConfig_Persists_SessionSkills_On_Insert()
+    {
+        await _repo.SetConfigAsync(new ListConfigEntity
+        {
+            ListId = _listId,
+            SessionSkills = "[\"ponytail\"]",
+        });
+
+        var fetched = await _repo.GetConfigAsync(_listId);
+        Assert.NotNull(fetched);
+        Assert.Equal("[\"ponytail\"]", fetched.SessionSkills);
+    }
+
+    [Fact]
+    public async Task SetConfig_Persists_SessionSkills_On_Update()
+    {
+        await _repo.SetConfigAsync(new ListConfigEntity { ListId = _listId, SessionSkills = "[\"a\"]" });
+        await _repo.SetConfigAsync(new ListConfigEntity { ListId = _listId, SessionSkills = "[\"b\",\"c\"]" });
+
+        var fetched = await _repo.GetConfigAsync(_listId);
+        Assert.NotNull(fetched);
+        Assert.Equal("[\"b\",\"c\"]", fetched.SessionSkills);
+    }
+
+    [Fact]
+    public async Task SetConfig_Null_SessionSkills_Clears_On_Update()
+    {
+        await _repo.SetConfigAsync(new ListConfigEntity { ListId = _listId, SessionSkills = "[\"a\"]" });
+        await _repo.SetConfigAsync(new ListConfigEntity { ListId = _listId, SessionSkills = null });
+
+        var fetched = await _repo.GetConfigAsync(_listId);
+        Assert.NotNull(fetched);
+        Assert.Null(fetched.SessionSkills);
+    }
+
     public void Dispose()
     {
         _ctx.Dispose();

tests/ClaudeDo.Worker.Tests/Repositories/TaskRepositoryAgentSettingsTests.cs

@@ -72,4 +72,33 @@ public sealed class TaskRepositoryAgentSettingsTests : IDisposable
         Assert.Null(entity.SystemPrompt);
         Assert.Null(entity.AgentPath);
     }
+
+    [Fact]
+    public async Task UpdateAgentSettingsAsync_Persists_SessionSkills()
+    {
+        var taskId = await SeedTaskAsync();
+
+        await _repo.UpdateAgentSettingsAsync(taskId, null, null, null, sessionSkills: "[\"ponytail\",\"ponytail-help\"]");
+
+        var entity = await _repo.GetByIdAsync(taskId);
+        Assert.NotNull(entity);
+        Assert.Equal("[\"ponytail\",\"ponytail-help\"]", entity!.SessionSkills);
+    }
+
+    [Fact]
+    public async Task UpdateAgentSettingsAsync_Null_SessionSkills_ClearsColumn()
+    {
+        var taskId = await SeedTaskAsync();
+
+        using (var ctx = _db.CreateContext())
+        {
+            await new TaskRepository(ctx).UpdateAgentSettingsAsync(taskId, null, null, null, sessionSkills: "[\"a\"]");
+        }
+
+        await _repo.UpdateAgentSettingsAsync(taskId, null, null, null, sessionSkills: null);
+
+        var entity = await _repo.GetByIdAsync(taskId);
+        Assert.NotNull(entity);
+        Assert.Null(entity!.SessionSkills);
+    }
 }