diff --git a/errorfix/rules/rule.py b/errorfix/rules/rule.py
new file mode 100644
index 0000000..414496c
--- /dev/null
+++ b/errorfix/rules/rule.py
@@ -0,0 +1,60 @@
+from dataclasses import dataclass, field
+from typing import Optional, List, Dict, Any
+from enum import Enum
+
+
+class Severity(str, Enum):
+    ERROR = "error"
+    WARNING = "warning"
+    INFO = "info"
+    SUGGESTION = "suggestion"
+
+
+@dataclass
+class Rule:
+    id: str
+    name: str
+    pattern: str
+    fix: str
+    description: str
+    severity: Severity = Severity.ERROR
+    language: Optional[str] = None
+    tool: Optional[str] = None
+    tags: List[str] = field(default_factory=list)
+    priority: int = 0
+    metadata: Dict[str, Any] = field(default_factory=dict)
+
+    def __post_init__(self):
+        if isinstance(self.severity, str):
+            self.severity = Severity(self.severity)
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            'id': self.id,
+            'name': self.name,
+            'pattern': self.pattern,
+            'fix': self.fix,
+            'description': self.description,
+            'severity': self.severity.value if isinstance(self.severity, Severity) else self.severity,
+            'language': self.language,
+            'tool': self.tool,
+            'tags': self.tags,
+            'priority': self.priority,
+            'metadata': self.metadata,
+        }
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> 'Rule':
+        return cls(
+            id=data.get('id', ''),
+            name=data.get('name', ''),
+            pattern=data.get('pattern', ''),
+            fix=data.get('fix', ''),
+            description=data.get('description', ''),
+            severity=data.get('severity', 'error'),
+            language=data.get('language'),
+            tool=data.get('tool'),
+            tags=data.get('tags', []),
+            priority=data.get('priority', 0),
+            metadata=data.get('metadata', {}),
+        )