Coding & Debugging Prompts

Debug Error Explainer

Understand a coding error in plain language and get the smallest likely fix, without exposing sensitive credentials.

✱ By PiSkill TeamFreeChatGPTClaudeGeminiMicrosoft Copilot

Best for

Developers who want a clear explanation of an error message along with the smallest safe fix, without exposing secrets.

Suitable LLM groups

FrontierReasoning

Prompt

You are a debugging assistant helping me understand and fix a coding error. Use only the error message, code, and context I provide. Do not claim that a fix has been tested unless I tell you the results of testing it. Never ask me for passwords, API keys, tokens, or any other secrets, and remind me not to paste them into this prompt. If you need more information to diagnose the issue accurately, ask me clarifying questions instead of guessing.

Error message or stack trace: {{input_text}}
Relevant code (remove any secrets before pasting): {{context}}
What I expected to happen: {{goal}}
What actually happened: {{constraints}}
Recent changes I made before this error appeared: {{audience}}

Please produce the following:
1. A plain-language explanation of what this error means.
2. The likely cause of the error based on the code and context provided.
3. The smallest fix likely to resolve the issue, avoiding unnecessary rewrites.
4. Corrected code if enough context was provided to write it accurately.
5. Step-by-step debugging steps I can follow to confirm the diagnosis.
6. Any information you are missing that would help you give a more accurate answer.
7. One prevention tip to help avoid this type of error in the future.

Keep the output structured under clear headings: Plain-Language Explanation, Likely Cause, Smallest Fix, Corrected Code (if possible), Debugging Steps, Missing Information, Prevention Tip. Do not claim the fix has been tested unless I explicitly provide test results, and never request passwords, API keys, tokens, or other secrets.

How to use

Paste the exact error message and relevant code, removing any secrets first
Describe what you expected to happen versus what actually happened
Run the prompt in your preferred AI assistant
Answer any clarifying questions before applying the suggested fix
Test the fix yourself and confirm results before considering the issue resolved

Example input

Error message: TypeError: Cannot read properties of undefined (reading 'map')
Relevant code: const items = data.results.map(item => item.name);
Expected: The list of item names should render on the page.
Actual: The app crashes on load with the TypeError above.
Recent changes: I recently changed the API endpoint this data comes from.

Example output

Plain-Language Explanation: This error means the code is trying to call .map() on something that is undefined, which usually happens when the expected data hasn't loaded yet or the API response structure changed.

Likely Cause: Since you recently changed the API endpoint, data.results is likely undefined because the new endpoint may return a different response shape or the data hasn't finished loading.

Smallest Fix: Add a check to confirm data.results exists before calling .map() on it.

Corrected Code: const items = (data.results || []).map(item => item.name);

Debugging Steps: Log the full data object right before this line to see its actual shape; confirm the new API endpoint returns a results field; check if the data is being fetched asynchronously without a loading state.

Missing Information: The actual response shape from the new API endpoint would help confirm this diagnosis with certainty.

Prevention Tip: Add a default value or loading state whenever rendering depends on data from an API call, especially after changing endpoints.

Customization tips

— Include the full stack trace when possible, not just the first line of the error
— Mention your programming language and framework if it's not obvious from the code
— Always remove API keys, tokens, or passwords from code before pasting it
— Ask for a more detailed explanation if the plain-language summary isn't enough for your skill level

FAQ

No. The prompt explicitly avoids requesting secrets and reminds you to remove them from any code you paste.

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Comments

Sam O.

Used this to ship 6 SEO articles in a week — the FAQ block alone is worth it.

Ines P.

Wish it had a Spanish voice preset, but overall very solid.

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