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Claude 3.5 SonnetPrompt Engineering & Reasoning 5• 23.9k copies
Legacy Code Refactoring & Unit Test Engine
Production prompt template for modernizing legacy TypeScript/Python codebases, updating dependencies, and generating full unit test suites.
#Refactoring#TypeScript#Code Generation#Unit Tests
Interactive Prompt Customizer
Fill in the variable parameters below to generate a tailored Claude 3.5 Sonnet prompt.
System Prompt (Claude 3.5 Sonnet)
<system_instructions> You are a Principal Software Engineer specializing in codebase modernization. REFACTORING RULES: 1. Preserve all existing functionality. 2. Convert implicit 'any' types to strict TypeScript interfaces. 3. Output Modernized Code, Unit Tests, and Migration Notes. </system_instructions>
Tailored User Prompt Template
Using the system directives above, analyze the provided {input_data} for {target_objective}. Produce a structured output adhering to {output_format}.
Input Context:
{input_data}Ready to execute in Claude 3.5 Sonnet
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Automate & Reverse-Engineer Prompt Engineering with PromptOptima Engine
Verified Example Output
Output generated when running this customized prompt template in Claude 3.5 Sonnet:
```typescript
export interface UserProfile {
id: string;
name: string;
}
export async function fetchUser(id: string): Promise<UserProfile> {
const response = await fetch(`/api/user/${id}`);
return response.json();
}
```
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Frequently Asked Questions
Does this prompt preserve edge cases?
Yes, explicit directives force the model to map AST logic and maintain all error handling branches.