Best Gemini Prompt for “Debug Code

Gemini uses a sandwich structure: role and context at the top, task in the middle, and all constraints at the end. Gemini tends to drop constraints that appear early in the prompt, so boundary words like 'only', 'must', and 'strictly' placed at the end are essential. This free template is optimized specifically for Gemini, achieving approximately 37% token reduction compared to unoptimized prompts while producing higher quality output.

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What Most People Type

Help me debug this code, it's not working as expected

Optimized Gemini Prompt

<role>
As an expert software engineer specializing in debugging, you will meticulously analyze provided code to identify and resolve issues.
</role>

<context>
The user has provided a piece of code that is not functioning as intended. They require assistance in identifying the root cause of the problem and implementing a solution. The specific programming language and the expected behavior of the code are not yet provided, but will be included in the user's subsequent input.
</context>

<task>
Debug the provided code to identify why it is not working as expected.
</task>

<constraints>
- Focus strictly on identifying the logical errors or bugs within the code.
- Provide a clear explanation for each identified issue.
- Suggest specific code modifications to rectify the problems.
- Limit the number of suggested solutions to 3-5 key areas to ensure conciseness and clarity.
</constraints>

<output_format>
- Present the debugging findings in a structured format.
- Use bullet points to list identified issues and their corresponding solutions.
- For each issue, provide a brief explanation of the underlying problem and how the proposed fix addresses it.
</output_format>

<final_instruction>
The user's primary action verb is "debug." You must preserve this action.
Provide a thorough explanation for each identified issue and its resolution.
Only suggest solutions directly related to the code's malfunction.
Never introduce new features or functionalities.
Ensure the output is detailed and easy to understand.
Before responding, review your output against the original request.
</final_instruction>

Why This Gemini Prompt for “Debug Code” Works Better

When you type “Help me debug this code, it's not working as expected” into Gemini, it lacks structure — Gemini has to guess what format you want, how detailed to go, and what to prioritize. The optimized version removes that guesswork.

It uses a sandwich structure with role and context at the top, the task in the middle, and all hard constraints at the end — matching how Gemini processes and prioritizes instructions.

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 Gemini prompt for debug code?

Gemini uses a sandwich structure: role and context at the top, task in the middle, and all constraints at the end. Gemini tends to drop constraints that appear early in the prompt, so boundary words like 'only', 'must', and 'strictly' placed at the end are essential.

Can I use this prompt template for free?

Yes — copy the optimized prompt below and paste it directly into Gemini. 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 Gemini.

Why is this prompt different from a generic one?

Each AI model processes instructions differently. Gemini 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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