diff --git a/scripts/blame.py b/scripts/blame.py
index cebfb4240..59a4471e9 100755
--- a/scripts/blame.py
+++ b/scripts/blame.py
@@ -21,5 +21,30 @@ def get_aider_commits():
 
     return commits
 
+import sys
+
+def mark_aider_lines(filename):
+    aider_commits = set(get_aider_commits())
+    
+    with open(filename, "r") as f:
+        lines = f.readlines()
+
+    for i, line in enumerate(lines, start=1):
+        result = subprocess.run(
+            ["git", "blame", "-L", f"{i},{i}", "--porcelain", filename], 
+            capture_output=True,
+            text=True,
+            check=True
+        )
+        commit_hash = result.stdout.split(" ")[0]
+        if commit_hash in aider_commits:
+            print(f"* {line}", end="")
+        else:
+            print(f"  {line}", end="")
+
 if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print(f"Usage: {sys.argv[0]} <filename>")
+        sys.exit(1)
+        
     mark_aider_lines(sys.argv[1])