diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 3bc651eb2f2..f43cefaacaa 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -6,6 +6,7 @@
 
 - Start review comments with a short, one-sentence summary of the suggested fix.
 - Do not add comments about code style, formatting or linting issues.
+- The main review status comment should be inside a collapsible section with the summary as title. No header sections outside of the collapsible section.
 
 # GitHub Copilot & Claude Code Instructions
 
diff --git a/script/gen_copilot_instructions.py b/script/gen_copilot_instructions.py
index ed8c75d18f5..b0bb41db0b8 100755
--- a/script/gen_copilot_instructions.py
+++ b/script/gen_copilot_instructions.py
@@ -23,6 +23,7 @@ COPILOT_SPECIFIC_INSTRUCTIONS = """
 
 - Start review comments with a short, one-sentence summary of the suggested fix.
 - Do not add comments about code style, formatting or linting issues.
+- The main review status comment should be inside a collapsible section with the summary as title. No header sections outside of the collapsible section.
 """