ci: preserve signed canonical integrations

tests/test_aiwg_workspace_contracts.py

@@ -6,6 +6,8 @@ import json
 from datetime import datetime
 from pathlib import Path
 
+import yaml
+
 
 ROOT = Path(__file__).resolve().parents[1]
 
@@ -102,3 +104,12 @@ def test_workspace_authority_and_delivery_permissions_remain_explicit():
     assert config["remotes"]["primary"] == "origin"
     assert config["remotes"]["issue_tracker"] == "origin"
     assert config["remotes"]["ci"] == "origin"
+
+
+def test_delivery_profile_preserves_signed_canonical_history():
+    profile = yaml.safe_load(
+        (ROOT / ".aiwg" / "bt6-maintainer.yaml").read_text(encoding="utf-8"),
+    )
+
+    assert profile["delivery"]["defaultMergeMethod"] == "merge"
+    assert profile["delivery"]["allowedMergeMethods"] == ["merge"]