diff --git a/grep.py b/grep.py
new file mode 100644
index 0000000..3ffcabc
--- /dev/null
+++ b/grep.py
@@ -0,0 +1,32 @@
+import os
+import re
+
+def codebase_grep(search_directory, pattern, file_extension=None, case_sensitive=False):
+    results = []
+    exclude_dirs = {'.git', 'node_modules', 'venv', '.venv', '__pycache__'}
+    flags = 0 if case_sensitive else re.IGNORECASE
+    compiled_pattern = re.compile(pattern, flags)
+
+    for root, dirs, files in os.walk(search_directory):
+        # Remove excluded directories
+        dirs[:] = [d for d in dirs if os.path.join(root, d) not in exclude_dirs]
+
+        for file in files:
+            file_path = os.path.join(root, file)
+            if file_extension and not file.endswith(file_extension):
+                continue
+
+            try:
+                with open(file_path, 'r', encoding='utf-8') as f:
+                    for line_num, line in enumerate(f):
+                        if compiled_pattern.search(line):
+                            results.append({
+                                'file': file_path,
+                                'line': line_num + 1,
+                                'content': line.strip()
+                            })
+                            if len(results) >= 100:
+                                return results
+            except UnicodeDecodeError:
+                continue
+    return results
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