diff --git a/scripts/consistency_check.py b/scripts/consistency_check.py
index 11dc4e1..fbe0c9c 100644
--- a/scripts/consistency_check.py
+++ b/scripts/consistency_check.py
@@ -2040,8 +2040,15 @@ def check_repo(
                             fixable=False,
                         )
 
-            if t_sh_id and task_dep_targets:
+            if (
+                t_sh_id
+                and task_dep_targets
+                and normalised_file_status not in CLOSED_WORKSTREAM_STATUSES
+                and t_status not in ("done", "cancel")
+            ):
                 # C-20 for task blocks: the waiting task is the from side.
+                # Closed workplans and closed tasks are not indexed — their
+                # ordering is history, not a live commitment.
                 for target in task_dep_targets:
                     target_hub_id, _target_status = _resolve_dependency_target(target)
                     is_task_target = bool(_TASK_RECORD_ID_RE.search(target))