Implemented @include() directive system to eliminate ~800 lines of duplicated content across 10 specialist prompt files. All prompt-related content now consolidated under prompts/ directory for better maintainability.
Changes:
- Added processIncludes() to prompt-manager.js for generic @include() support
- Created prompts/shared/ with 5 reusable template files
- Refactored all 10 specialist prompts to use @include() for common sections
- Moved login_instructions.txt to prompts/shared/ (deleted login_resources/)
- Updated CLAUDE.md to reflect new structure
Impact: -137 net lines, zero breaking changes, infinitely scalable for future shared content.
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Co-Authored-By: Claude <noreply@anthropic.com>