diff --git a/src/wisevalidator/reporter.py b/src/wisevalidator/reporter.py
index 46822d6..6dd00f3 100644
--- a/src/wisevalidator/reporter.py
+++ b/src/wisevalidator/reporter.py
@@ -12,7 +12,11 @@ from wisevalidator.models import RunResult
 STATE_HUB_URL = os.environ.get("STATE_HUB_URL", "http://127.0.0.1:8000")
 
 
-def report(result: RunResult, workstream_id: str | None = None) -> bool:
+def report(
+    result: RunResult,
+    workplan_id: str | None = None,
+    workstream_id: str | None = None,
+) -> bool:
     """POST result to state-hub /progress/. Returns True on success."""
     body = {
         "event_type": "e2e_result",
@@ -35,8 +39,9 @@ def report(result: RunResult, workstream_id: str | None = None) -> bool:
         "details": json.dumps(body),
         "event_type": "e2e_result",
     }
-    if workstream_id:
-        payload["workstream_id"] = workstream_id
+    scope_id = workplan_id or workstream_id
+    if scope_id:
+        payload["workplan_id"] = scope_id
 
     try:
         req = urllib.request.Request(
diff --git a/tests/test_reporter.py b/tests/test_reporter.py
index b6b95d6..be03cf0 100644
--- a/tests/test_reporter.py
+++ b/tests/test_reporter.py
@@ -34,4 +34,5 @@ def test_report_posts_e2e_result() -> None:
     assert captured["url"].endswith("/progress/")
     assert captured["body"]["event_type"] == "e2e_result"
     assert "PASSED" in captured["body"]["summary"]
-    assert captured["body"]["workstream_id"] == "ws-uuid"
\ No newline at end of file
+    assert captured["body"]["workplan_id"] == "ws-uuid"
+    assert "workstream_id" not in captured["body"]
\ No newline at end of file