Error Explainer Skill

Stack traces are written for compilers, not developers. This skill does the translation: what the error actually means, which frame in the stack matters, what likely caused it, and what to check first. Useful for errors you have never seen before and for errors you have seen so many times you stopped reading them carefully.

What the skill does

• Error translation. Converts cryptic error messages, compiler output, and runtime exceptions into a plain-language explanation of what actually failed.
• Stack trace navigation. Identifies the relevant frames in the trace — distinguishing your code from framework internals from library noise.
• Cause analysis. Explains the most common causes of this specific error in this specific language and framework.
• Environment context. Notes whether the error is likely a code bug, a configuration issue, a dependency problem, or an environment mismatch.
• Next steps. Provides a ranked checklist of what to check and try, starting with the highest-probability fix.
• Similar errors. Warns about related errors that are commonly confused with this one — so you do not fix the wrong thing.

How it works

1. Paste the error. Drop in the full error message, stack trace, or compiler output — the more complete, the better.
2. Provide context. What were you doing when it happened? Language, framework, and a brief description of the operation that failed.
3. Explanation. The skill explains the error in plain language, identifies the relevant frame, and lists likely causes.
4. Next steps. A prioritised checklist of what to check, in order of likelihood.
5. Follow-up. Ask for a deeper explanation of any part, or paste additional context (the code at the relevant line, your config file, your dependency versions) for a more specific diagnosis.

How to use it

1. Click ⬇ Download this Claude Skill above.
2. Import through Claude Desktop (Customize → Skills → + → Create skill → Upload a skill) or drop into .claude/commands/. Full walkthrough in the import tutorial.
3. Invoke and paste your error:

   /error-explainer
   

   Or include context inline:

   /error-explainer Node.js 20, Express. Getting this when the app starts up: [paste error]
   

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Quick-start prompt (no download)

Explain this error message to me as clearly as possible.

1. What does this error mean in plain language?
2. Which part of the stack trace is mine vs. framework/library internals? What is the relevant frame?
3. What are the 3 most likely causes of this specific error in [language/framework]?
4. Is this a code bug, a configuration issue, a dependency problem, or an environment mismatch?
5. Give me a ranked checklist of what to check and try, starting with the highest-probability fix.
6. Are there related errors commonly confused with this one that I should rule out?

Context: [language, framework, what you were doing when it happened]

Error: [paste full error and stack trace here]

Tips:

• Always paste the full stack trace, not just the last line — the cause is usually several frames up from where the exception is thrown.
• Include your dependency versions if the error looks like it might be a version mismatch or a known library bug.
• If you are seeing this error only in production and not locally, mention that — it changes the diagnosis entirely.
• Ask the skill to explain what a specific frame in the stack trace is doing if the call chain is confusing.

⚠ This skill has been tested and optimized for Claude. Results may vary with other AI assistants.