debugging-patterns

1## Pattern-Based Diagnosis
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3- Check patterns.md for known gotchas matching the error
4- Cross-reference with common patterns: null pointer, race condition, resource leak, config error
5- Rate root cause confidence (>=80% to proceed with fix)
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7## Evidence Collection
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9- Stack traces with full call chain
10- Error messages with context
11- Exit codes from reproduction attempts
12- Git blame/log for change correlation
13- Environment differences (if applicable)
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15## When to Use
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17- During DEBUG workflow investigation phase
18- When BUILD tests fail unexpectedly
19- When reviewing error handling gaps
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21## Agents Used
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23- `bug-investigator` (primary consumer)
24- `silent-failure-hunter` (pattern reference)