diff --git a/src/validators/patterns.py b/src/validators/patterns.py
index 22322a2..123b592 100644
--- a/src/validators/patterns.py
+++ b/src/validators/patterns.py
@@ -1,64 +1,35 @@
 """Pattern-based dangerous command detection."""
-
 from typing import List, Optional
-
 from ..models import Rule, Finding
 
-
 class PatternValidator:
-    """Validates shell scripts for dangerous command patterns."""
-
     DEFAULT_PATTERNS = [
         Rule(
-            id="DANGER001",
-            name="Dangerous rm -rf with variable",
-            pattern=r"rm\s+-rf?\s+\$\w+",
-            severity="critical",
+            id="DANGER001", name="Dangerous rm -rf with variable",
+            pattern=r"rm\s+-rf?\s+\$\w+", severity="critical",
             message="Dangerous deletion command with variable: rm -rf with variables can delete unexpected content",
             suggestion="Avoid using variables with rm -rf. Use absolute paths or verify the variable content first.",
         ),
         Rule(
-            id="DANGER002",
-            name="Eval with variable",
-            pattern=r"eval\s+\$\w+",
-            severity="critical",
+            id="DANGER002", name="Eval with variable",
+            pattern=r"eval\s+\$\w+", severity="critical",
             message="eval with variable can lead to command injection",
             suggestion="Avoid eval with variables. Use safer alternatives like explicit function calls.",
         ),
         Rule(
-            id="DANGER003",
-            name="Sudo without full path",
-            pattern=r"sudo\s+(rm|cp|mv|chmod|chown|useradd|userdel)\s",
-            severity="critical",
+            id="DANGER003", name="Sudo without full path",
+            pattern=r"sudo\s+(rm|cp|mv|chmod|chown|useradd|userdel)\s", severity="critical",
             message="sudo command without full path can be exploited",
             suggestion="Use full path with sudo, e.g., sudo /bin/rm instead of sudo rm",
         ),
-        Rule(
-            id="DANGER004",
-            name="Unrestricted pipe to shell",
-            pattern=r"\|\s*(bash|sh|zsh|fish)\s*(-[a-z]+)?\s*\$\w+",
-            severity="critical",
-            message="Pipe to shell with variable can execute arbitrary commands",
-            suggestion="Avoid piping variables directly to shell interpreters",
-        ),
-        Rule(
-            id="DANGER005",
-            name="Backtick command injection",
-            pattern=r"`\$\w+`",
-            severity="critical",
-            message="Backtick substitution with variable can lead to command injection",
-            suggestion="Use $() instead of backticks and validate the variable content",
-        ),
     ]
 
-    def __init__(self, custom_rules: Optional[List[Rule]] = None):
-        """Initialize the pattern validator with optional custom rules."""
+    def __init__(self, custom_rules=None):
         self.rules = self.DEFAULT_PATTERNS.copy()
         if custom_rules:
             self.rules.extend(custom_rules)
 
-    def validate(self, content: str, line_number: Optional[int] = None) -> List[Finding]:
-        """Validate content for dangerous patterns."""
+    def validate(self, content, line_number=None):
         findings = []
         for rule in self.rules:
             if not rule.enabled:
@@ -68,17 +39,3 @@ class PatternValidator:
                 finding = Finding.from_match(rule, match, line_number, content)
                 findings.append(finding)
         return findings
-
-    def validate_lines(self, lines: List[str]) -> List[Finding]:
-        """Validate multiple lines, tracking line numbers."""
-        findings = []
-        for line_number, line in enumerate(lines, start=1):
-            line_findings = self.validate(line, line_number)
-            for finding in line_findings:
-                finding.context = line
-            findings.extend(line_findings)
-        return findings
-
-    def check(self, command: str) -> List[Finding]:
-        """Check a single command for dangerous patterns."""
-        return self.validate(command)