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Paste your full error stack trace, the relevant code file, and one sentence describing what you were doing when it broke. Get the root cause not just the symptom, the exact line to fix with corrected code, and a note on the class of bug so you can grep for the same pattern elsewhere. Stack traces tell you where it broke — Claude tells you why.
1-2 hours per bug
Engineering
Claude
Before applying the suggested fix, reproduce the error locally and confirm the identified root cause is the actual cause, not a coincidental one.
Do not paste code containing database connection strings, API keys, auth tokens, or user data into the prompt. For security-critical production issues, diagnosis alone is insufficient — engage your security team before applying any fix. Runtime concurrency bugs and intermittent failures may not be diagnosable from a single stack trace.