diff --git a/.claude/skills/commit/SKILL.md b/.claude/skills/commit/SKILL.md
index 013487005..002c090e3 100644
--- a/.claude/skills/commit/SKILL.md
+++ b/.claude/skills/commit/SKILL.md
@@ -30,12 +30,7 @@ When asked to commit code, follow these steps:
 4. Stage and commit the changes:
 
    - Add relevant files using `git add`
-   - Create the commit with a message ending with:
-     ```
-     Co-Authored-By: Claude <noreply@anthropic.com>
-     ```
-   - Use a HEREDOC for the commit message to ensure proper formatting, **unless** you are sandboxed, in
-     which case use a plain string because HEREDOCs are not supported.
+   - Use a plain string for the commit message (do not use HEREDOCs).
 
 5. Report the results including:
    - The commit hash