Best Claude Code Prompt for “Debug Code”
Claude Code is an agentic CLI that autonomously reads files, runs commands, and writes code. The single most important technique is verification-first prompting: start with what 'done' looks like (run tests, verify build) and describe outcomes, not implementation steps. This free template is optimized specifically for Claude Code, achieving approximately 37% token reduction compared to unoptimized prompts while producing higher quality output.
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What Most People Type
Optimized Claude Code Prompt
<verification> Run the test suite and ensure all tests pass. Verify that the application starts without errors. </verification> <outcome> Debug the provided code to identify and fix the root cause of the unexpected behavior. The application should function as intended after the debugging process. </outcome> <context> Refer to the existing codebase for established patterns and conventions. Read through the relevant code files to understand the current logic and identify potential areas for improvement. Summarize your understanding of the current approach before implementing any changes. </context> <constraints> Do not introduce new dependencies. Maintain backward compatibility with existing functionality. Prioritize solutions that align with the established architectural patterns. </constraints> <git> Create a new branch for these changes. Commit the resolved code with a clear and descriptive commit message. </git>
Why This Claude Code Prompt for “Debug Code” Works Better
When you type “Help me debug this code, it's not working as expected” into Claude Code, it lacks structure — Claude Code has to guess what format you want, how detailed to go, and what to prioritize. The optimized version removes that guesswork.
It starts with verification criteria (what 'done' looks like), describes the desired outcome rather than implementation steps, and scopes the task to specific files — matching Claude Code's agentic workflow.
This Prompt Optimized for Other AI Models
Each AI model processes instructions differently. See how this same prompt is optimized for:
Frequently Asked Questions
What makes a good Claude Code prompt for debug code?
Claude Code is an agentic CLI that autonomously reads files, runs commands, and writes code. The single most important technique is verification-first prompting: start with what 'done' looks like (run tests, verify build) and describe outcomes, not implementation steps.
Can I use this prompt template for free?
Yes — copy the optimized prompt below and paste it directly into Claude Code. For unlimited prompt optimization across all 5 AI models, try PromptOptimizr free with 10 prompts per month. You can also use the Chrome extension to optimize prompts directly inside your AI chat.
Why is this prompt different from a generic one?
Each AI model processes instructions differently. Claude Code has specific formatting preferences — this prompt is structured to work with those preferences, not against them. The result is better output quality with approximately 37% fewer tokens.
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