ignore header description in ai response

pr_agent/algo/utils.py

@@ -317,6 +317,12 @@ def _fix_key_value(key: str, value: str):
 
 
 def load_yaml(response_text: str) -> dict:
+    # remove everything before the first ```yaml
+    snipet_pattern = r'```(yaml)?[\s\S]*?```'
+    snipet = re.search(snipet_pattern, response_text)
+    if snipet:
+        response_text = snipet.group()
+
     response_text = response_text.removeprefix('```yaml').rstrip('`')
     try:
         data = yaml.safe_load(response_text)

tests/unittest/test_load_yaml.py

@@ -15,6 +15,18 @@ class TestLoadYaml:
         expected_output = {'name': 'John Smith', 'age': 35}
         assert load_yaml(yaml_str) == expected_output
 
+    def test_load_valid_yaml_with_description(self):
+        yaml_str = '''\
+Here is the answer in YAML format:
+
+```yaml
+name: John Smith
+age: 35
+```
+'''
+        expected_output = {'name': 'John Smith', 'age': 35}
+        assert load_yaml(yaml_str) == expected_output
+
     def test_load_invalid_yaml1(self):
         yaml_str = \
 '''\