Review this {{language}} code as a careful senior engineer.

Focus on: {{focus}}
Team standards: {{standards}}

Code:
{{code}}

Return:
1. Bugs or correctness issues (most serious first)
2. Security or performance risks
3. Readability and maintainability notes
4. Concrete suggested fixes, with short code snippets where helpful
5. One line on what's done well

Be direct. Skip nitpicks unless they break the team standards.