diff --git a/src/generate_repo_overview/policy_sync.py b/src/generate_repo_overview/policy_sync.py
index 4a90185..bbff781 100644
--- a/src/generate_repo_overview/policy_sync.py
+++ b/src/generate_repo_overview/policy_sync.py
@@ -226,7 +226,7 @@ def fetch_policy_report(
     gh_runner: Callable[[list[str], str | None], str] | None = None,
     status_prefix: str = "repo-overview",
 ) -> bool:
-    """Fetch the latest completed configured workflow artifact.
+    """Fetch the latest completed artifact from a scheduled ``main`` run.
 
     A false return value means that no usable artifact was available.  Fetching
     is deliberately best-effort because it is an enhancement to the Pages
@@ -250,6 +250,13 @@ def fetch_policy_report(
                     config.workflow,
                     "--status",
                     "completed",
+                    # Manual dispatches can select a different policy-sync
+                    # mode, so only consume reports produced by the scheduled
+                    # workflow on the repository's main branch.
+                    "--event",
+                    "schedule",
+                    "--branch",
+                    "main",
                     "--limit",
                     "1",
                     "--json",
diff --git a/tests/test_policy_sync.py b/tests/test_policy_sync.py
index 64037e9..1554ad5 100644
--- a/tests/test_policy_sync.py
+++ b/tests/test_policy_sync.py
@@ -198,7 +198,7 @@ def test_policy_report_config_rejects_duplicate_aliases(tmp_path: Path) -> None:
         load_org_config(path)
 
 
-def test_fetch_policy_report_downloads_latest_completed_artifact(
+def test_fetch_policy_report_downloads_latest_scheduled_main_artifact(
     tmp_path: Path, monkeypatch: pytest.MonkeyPatch
 ) -> None:
     monkeypatch.delenv("GITHUB_TOKEN", raising=False)
@@ -215,6 +215,8 @@ def test_fetch_policy_report_downloads_latest_completed_artifact(
     def fake_gh(args: list[str], token: str | None) -> str:
         assert token is None
         if args[:2] == ["run", "list"]:
+            assert args[args.index("--event") + 1] == "schedule"
+            assert args[args.index("--branch") + 1] == "main"
             return "11\n"
         if args[:2] == ["run", "download"]:
             download_dir = Path(args[args.index("--dir") + 1])
@@ -240,6 +242,8 @@ def test_fetch_policy_report_is_non_fatal_when_no_run_exists(tmp_path: Path) ->
     def fake_gh(args: list[str], token: str | None) -> str:
         del token
         assert args[:2] == ["run", "list"]
+        assert args[args.index("--event") + 1] == "schedule"
+        assert args[args.index("--branch") + 1] == "main"
         return "null\n"
 
     assert fetch_policy_report(config, token="secret", gh_runner=fake_gh) is False