Daily Coding Checklist

Core Checklist

Before Starting

• Read before modify - Must read target file with Read tool before making changes
• Understand context - Confirm understanding of existing code logic and design intent

During Coding

• Minimal changes - Only change what's necessary, no over-engineering, no unrelated features
• Type safety - Add type hints for Python, avoid

  any

  in TypeScript
• Security check - Avoid command injection, XSS, SQL injection vulnerabilities

After Completion

• Verify execution - Ensure code runs correctly with no syntax errors
• Clean up - Remove print/console.log debug statements and temporary files
• Brief summary - Inform user what was changed and the scope of impact

Quick Reference

Common Mistakes to Avoid

# ❌ Don't
def process(data=[]):  # Mutable default argument
    pass

# ✅ Should
def process(data: list | None = None):
    data = data or []

# ❌ Don't
except:  # Bare except
    pass

# ✅ Should
except ValueError as e:
    logger.error(f"Processing failed: {e}")
    raise

Security Check Points

• User input must be validated/escaped
• Use pathlib for file paths, avoid path traversal
• Never hardcode sensitive info (API keys, passwords)