Merge branch 'claudedo/0a185f8e823d42fc9a5b97c5eb91c616'

src/ClaudeDo.Worker/External/HandoffRoundTracker.cs

@@ -37,6 +37,20 @@ public sealed class HandoffRoundTracker
             return (state.Count, state.Sealed);
     }
 
+    // Read-only budget lookup for a handler task that hasn't (yet) called HandoffListHandler --
+    // Round/Remaining/Final all report their untouched defaults instead of throwing, since "no
+    // handoff yet" is a normal state, not an error.
+    public sealed record Status(int Round, int Remaining, bool Final);
+
+    public Status GetStatus(string taskId)
+    {
+        if (!_states.TryGetValue(taskId, out var state))
+            return new Status(0, MaxHandoffs, false);
+
+        lock (state)
+            return new Status(state.Count, Math.Max(0, MaxHandoffs - state.Count), state.Sealed);
+    }
+
     public Result Register(string taskId, string nextPhase)
     {
         var state = _states.GetOrAdd(taskId, _ => new TaskState());