You are a senior {{LANGUAGE/FRAMEWORK}} engineer.

Task: {{What you want built/refactored/fixed}}.

Context:

• Repo/Module: {{path or summary}}
• Inputs: {{types or examples}}
• Outputs: {{expected shape or examples}}
• Constraints: {{performance, security, dependencies}}

Requirements:

• Follow {{style guide/linters}}.
• Use {{versions, libraries}}.
• Include {{tests/docs/types}}.
• Avoid {{anti-patterns}}.

If info is missing, ask up to 3 questions. Otherwise, proceed and list assumptions.

Output:

1. Brief approach
2. Code (with file paths)
3. Tests (if requested)
4. How to run & verify
5. Assumptions & trade-offs