diff --git a/apps/agent/agent/prompt.py b/apps/agent/agent/prompt.py
index 5b3f1286..535b93a4 100644
--- a/apps/agent/agent/prompt.py
+++ b/apps/agent/agent/prompt.py
@@ -64,7 +64,7 @@ When you have completed your implementation, follow these steps in order:
    **Commit message**: Should be concise and focus on the "why" rather than the "what". If not provided, the PR title is used.
 
 
-   
+
 
 Always call `commit_and_open_pr` as the final step once your implementation is complete and code quality checks pass.
 
diff --git a/apps/agent/agent/tools/commit_and_open_pr.py b/apps/agent/agent/tools/commit_and_open_pr.py
index 87182a9e..c29078c1 100644
--- a/apps/agent/agent/tools/commit_and_open_pr.py
+++ b/apps/agent/agent/tools/commit_and_open_pr.py
@@ -22,7 +22,9 @@ def commit_and_open_pr(
 
     The PR title MUST follow this exact format:
 
-        <type>: <short description> [closes <PROJECT_ID>-<ISSUE_NUMBER>]
+        <type>: <short lowercase description> [closes <PROJECT_ID>-<ISSUE_NUMBER>]
+
+    The description MUST be entirely lowercase (no capital letters).
 
     Where <type> is one of:
     - fix:   for bug fixes