Remove test file

core/frontmatter.py

@@ -0,0 +1,39 @@
+"""
+Frontmatter parsing and serialization
+"""
+import re
+import yaml
+from typing import Optional, Tuple
+
+
+class FrontmatterParser:
+    FRONTMATTER_PATTERN = re.compile(r'^---\s*\n(.*?\n)---\s*\n', re.DOTALL)
+    
+    @staticmethod
+    def parse(content: str) -> Tuple[Optional[dict], str]:
+        """Parse frontmatter from markdown content"""
+        match = FrontmatterParser.FRONTMATTER_PATTERN.match(content)
+        
+        if match:
+            yaml_content = match.group(1)
+            body = content[match.end():]
+            
+            try:
+                frontmatter = yaml.safe_load(yaml_content) or {}
+                return frontmatter, body
+            except yaml.YAMLError:
+                return None, content
+        
+        return None, content
+    
+    @staticmethod
+    def serialize(frontmatter: dict, body: str) -> str:
+        """Serialize frontmatter and body to markdown"""
+        yaml_str = yaml.dump(frontmatter, default_flow_style=False, allow_unicode=True, sort_keys=False)
+        return f"---\n{yaml_str}---\n{body}"
+    
+    @staticmethod
+    def extract_title(body: str) -> Optional[str]:
+        """Extract title from markdown body"""
+        match = re.search(r'^#\s+(.+)$', body, re.MULTILINE)
+        return match.group(1).strip() if match else None