diff --git a/instructions/context-engineering.instructions.md b/instructions/context-engineering.instructions.md
index 5d832c75..05c87d9b 100644
--- a/instructions/context-engineering.instructions.md
+++ b/instructions/context-engineering.instructions.md
@@ -41,3 +41,7 @@ Principles for helping GitHub Copilot understand your codebase and provide bette
 - **Missing context**: Open the relevant files in tabs, or explicitly paste code snippets.
 - **Stale suggestions**: Copilot may not see recent changes. Re-open files or restart the session.
 - **Generic answers**: Be more specific. Add constraints, mention frameworks, reference existing code.
+
+---
+
+*Assisted by [Claude](https://claude.ai)*