Fix: allow agent status change on unassigned tasks

backend/app/api/tasks.py

@@ -2075,15 +2075,7 @@ async def _apply_non_lead_agent_task_rules(
             code="task_board_mismatch",
             message="Agent can only update tasks for their assigned board.",
         )
-    if (
+    # Allow agents to claim unassigned tasks by updating status (when permitted by board rules).
-        update.actor.agent
-        and "status" in update.updates
-        and (update.task.assigned_agent_id is None)
-    ):
-        raise _task_update_forbidden_error(
-            code="task_assignee_required",
-            message="Agents can only change status on tasks assigned to them.",
-        )
     if (
         update.actor.agent
         and update.task.assigned_agent_id is not None

backend/tests/test_task_agent_permissions.py

@@ -100,7 +100,7 @@ async def test_non_lead_agent_can_update_status_for_assigned_task() -> None:
 
 
 @pytest.mark.asyncio
-async def test_non_lead_agent_forbidden_without_assigned_task() -> None:
+async def test_non_lead_agent_can_update_status_for_unassigned_task() -> None:
     engine = await _make_engine()
     try:
         async with await _make_session(engine) as session:
@@ -127,6 +127,7 @@ async def test_non_lead_agent_forbidden_without_assigned_task() -> None:
                     name="board",
                     slug="board",
                     gateway_id=gateway_id,
+                    only_lead_can_change_status=False,
                 ),
             )
             session.add(
@@ -155,21 +156,15 @@ async def test_non_lead_agent_forbidden_without_assigned_task() -> None:
             actor = (await session.exec(select(Agent).where(col(Agent.id) == actor_id))).first()
             assert actor is not None
 
-            with pytest.raises(HTTPException) as exc:
+            updated = await tasks_api.update_task(
-                await tasks_api.update_task(
+                payload=TaskUpdate(status="in_progress"),
-                    payload=TaskUpdate(status="in_progress"),
+                task=task,
-                    task=task,
+                session=session,
-                    session=session,
+                actor=ActorContext(actor_type="agent", agent=actor),
-                    actor=ActorContext(actor_type="agent", agent=actor),
-                )
-
-            assert exc.value.status_code == 403
-            assert isinstance(exc.value.detail, dict)
-            assert exc.value.detail["code"] == "task_assignee_required"
-            assert (
-                exc.value.detail["message"]
-                == "Agents can only change status on tasks assigned to them."
             )
+
+            assert updated.status == "in_progress"
+            assert updated.assigned_agent_id == actor_id
     finally:
         await engine.dispose()