refactor: unify impl operation gates and correction verification

harness/tests/common/test_delegation_adoption_contract_docs.py

@@ -1,5 +1,6 @@
 """Executable consumer declaration contract wiring."""
 from pathlib import Path
+from harness.tests.common.impl_contract_docs import read_contract
 import unittest
 
 ROOT = Path(__file__).resolve().parents[3]
@@ -22,7 +23,7 @@ class DelegationAdoptionContractTests(unittest.TestCase):
             'review/skills/gitea-code-review',
         )
         for path in paths:
-            text = (ROOT / 'harness/agents' / path / 'SKILL.md').read_text()
+            text = read_contract(ROOT / 'harness/agents' / path / 'SKILL.md')
             with self.subTest(path=path):
                 self.assertIn('require_adoption', text)
                 self.assertIn('mode', text)