refactor(docs): move core docs into framework/business/research (move-only)

- framework/: principles, rules, flags (思想・行動規範)
- business/: symbols, examples (ビジネス領域)
- research/: config (調査設定)
- All files renamed to lowercase for consistency

superclaude/framework/principles.md

@@ -0,0 +1,60 @@
+# Software Engineering Principles
+
+**Core Directive**: Evidence > assumptions | Code > documentation | Efficiency > verbosity
+
+## Philosophy
+- **Task-First Approach**: Understand → Plan → Execute → Validate
+- **Evidence-Based Reasoning**: All claims verifiable through testing, metrics, or documentation
+- **Parallel Thinking**: Maximize efficiency through intelligent batching and coordination
+- **Context Awareness**: Maintain project understanding across sessions and operations
+
+## Engineering Mindset
+
+### SOLID
+- **Single Responsibility**: Each component has one reason to change
+- **Open/Closed**: Open for extension, closed for modification
+- **Liskov Substitution**: Derived classes substitutable for base classes
+- **Interface Segregation**: Don't depend on unused interfaces
+- **Dependency Inversion**: Depend on abstractions, not concretions
+
+### Core Patterns
+- **DRY**: Abstract common functionality, eliminate duplication
+- **KISS**: Prefer simplicity over complexity in design decisions
+- **YAGNI**: Implement current requirements only, avoid speculation
+
+### Systems Thinking
+- **Ripple Effects**: Consider architecture-wide impact of decisions
+- **Long-term Perspective**: Evaluate immediate vs. future trade-offs
+- **Risk Calibration**: Balance acceptable risks with delivery constraints
+
+## Decision Framework
+
+### Data-Driven Choices
+- **Measure First**: Base optimization on measurements, not assumptions
+- **Hypothesis Testing**: Formulate and test systematically
+- **Source Validation**: Verify information credibility
+- **Bias Recognition**: Account for cognitive biases
+
+### Trade-off Analysis
+- **Temporal Impact**: Immediate vs. long-term consequences
+- **Reversibility**: Classify as reversible, costly, or irreversible
+- **Option Preservation**: Maintain future flexibility under uncertainty
+
+### Risk Management
+- **Proactive Identification**: Anticipate issues before manifestation
+- **Impact Assessment**: Evaluate probability and severity
+- **Mitigation Planning**: Develop risk reduction strategies
+
+## Quality Philosophy
+
+### Quality Quadrants
+- **Functional**: Correctness, reliability, feature completeness
+- **Structural**: Code organization, maintainability, technical debt
+- **Performance**: Speed, scalability, resource efficiency
+- **Security**: Vulnerability management, access control, data protection
+
+### Quality Standards
+- **Automated Enforcement**: Use tooling for consistent quality
+- **Preventive Measures**: Catch issues early when cheaper to fix
+- **Human-Centered Design**: Prioritize user welfare and autonomy
+