diff --git a/claudetool/pre-commit.go b/claudetool/pre-commit.go
index a335e27..af94ef3 100644
--- a/claudetool/pre-commit.go
+++ b/claudetool/pre-commit.go
@@ -66,6 +66,8 @@
 - Special notations or tags
 - Capitalization and punctuation
 
+Ignore Change-ID and Co-authored-by lines in your analysis.
+
 First, provide a concise analysis of the predominant patterns.
 Then select up to 3 commit hashes that best exemplify the repository's commit style.
 Finally, output these selected commit hashes, one per line, without commentary.