diff --git a/src/rules/__init__.py b/src/rules/__init__.py
new file mode 100644
index 0000000..342f38a
--- /dev/null
+++ b/src/rules/__init__.py
@@ -0,0 +1,57 @@
+"""Rule registry and loading functionality."""
+
+from pathlib import Path
+from typing import Optional
+import yaml
+
+
+class RuleRegistry:
+    """Registry for analysis rules."""
+
+    def __init__(self):
+        self._rules = {}
+        self._enabled_by_default = set()
+
+    def register(self, rule_id: str, rule_config: dict, enabled: bool = True):
+        self._rules[rule_id] = rule_config
+        if enabled:
+            self._enabled_by_default.add(rule_id)
+
+    def get_rule(self, rule_id: str) -> Optional[dict]:
+        return self._rules.get(rule_id)
+
+    def is_enabled(self, rule_id: str, config: Optional[dict] = None) -> bool:
+        if config and "rules" in config:
+            rule_config = config["rules"].get(rule_id, {})
+            if "enabled" in rule_config:
+                return rule_config["enabled"]
+        return rule_id in self._enabled_by_default
+
+    def get_enabled_rules(self, config: Optional[dict] = None) -> list[str]:
+        enabled = []
+        for rule_id in self._rules:
+            if self.is_enabled(rule_id, config):
+                enabled.append(rule_id)
+        return enabled
+
+    def list_rules(self) -> list[str]:
+        return list(self._rules.keys())
+
+
+def load_config(config_path: Optional[Path] = None) -> dict:
+    """Load configuration from file."""
+    if config_path and config_path.exists():
+        with open(config_path) as f:
+            return yaml.safe_load(f) or {}
+
+    default_paths = [
+        Path.home() / ".aicoderc.yaml",
+        Path.cwd() / ".aicoderc.yaml",
+    ]
+
+    for path in default_paths:
+        if path.exists():
+            with open(path) as f:
+                return yaml.safe_load(f) or {}
+
+    return {}