diff --git a/.claude/agents/backend.md b/.claude/agents/backend.md
index b538303..d723332 100644
--- a/.claude/agents/backend.md
+++ b/.claude/agents/backend.md
@@ -13,6 +13,10 @@ You are the Backend Engineer for ColaFlow, responsible for server-side code, API
 
 Write high-quality, maintainable, testable backend code following best practices and coding standards.
 
+## Coding Standards
+
+Write clean, maintainable, and testable code that follows SOLID principles and adheres to established coding conventions. All implementations should emphasize readability, scalability, and long-term maintainability.
+
 ## IMPORTANT: Core Responsibilities
 
 1. **API Development**: Design and implement RESTful APIs