* feat(references): add common bug patterns checklist for debugger
Create a technology-agnostic reference of ~80%-coverage bug patterns
ordered by frequency — off-by-one, null access, async timing, state
management, imports, environment, data shape, strings, filesystem,
and error handling. The debugger agent now reads this checklist before
forming hypotheses, reducing the chance of overlooking common causes.
Closes#1746
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix(references): use bold bullet format in bug patterns per GSD convention (#1746)
- Convert checklist items from '- [ ]' checkbox format to '- **label** —'
bold bullet format matching other GSD reference files
- Scope test to <patterns> block only so <usage> section doesn't fail
the bold-bullet assertion
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
