feat: Add workflow verification system with dual analysis

- Create /workflow:verify command for plan validation before execution
- Implement gemini strategic analysis and codex technical analysis
- Add cross-validation framework with user approval workflow
- Enhance brainstorm auto.md with comprehensive pre_analysis configuration
- Include specialized verification prompt templates for structured analysis

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/workflows/cli-templates/prompts/verification/gemini-strategic.txt

@@ -0,0 +1,52 @@
+Strategic validation of workflow implementation plan from architectural and business perspective:
+
+## Required Strategic Analysis:
+1. **Architectural Soundness Assessment**
+   - Evaluate overall system design coherence
+   - Assess component interaction patterns
+   - Validate architectural decision consistency
+   - Identify potential design conflicts or gaps
+
+2. **Task Decomposition Logic Evaluation**
+   - Review task breakdown methodology and rationale
+   - Assess functional completeness of each task
+   - Evaluate task granularity and scope appropriateness
+   - Identify missing or redundant decomposition elements
+
+3. **Dependency Coherence Analysis**
+   - Map task interdependencies and logical flow
+   - Validate dependency ordering and scheduling
+   - Assess circular dependency risks
+   - Evaluate parallel execution opportunities
+
+4. **Business Alignment Verification**
+   - Validate alignment with stated business objectives
+   - Assess stakeholder requirement coverage
+   - Evaluate success criteria completeness and measurability
+   - Identify business risk and mitigation adequacy
+
+5. **Strategic Risk Identification**
+   - Identify architectural risks and technical debt implications
+   - Assess implementation complexity and resource requirements
+   - Evaluate timeline feasibility and milestone realism
+   - Document potential blockers and escalation scenarios
+
+## Output Requirements:
+### Strategic Assessment Report:
+- **Architecture Grade** (A-F): Overall design quality assessment
+- **Decomposition Grade** (A-F): Task breakdown effectiveness
+- **Risk Level** (Low/Medium/High): Combined implementation risk
+- **Business Alignment Score** (1-10): Requirement satisfaction level
+
+### Detailed Recommendations:
+- **Critical Issues**: Must-fix problems that could cause failure
+- **Improvement Opportunities**: Non-blocking enhancements
+- **Alternative Approaches**: Strategic alternatives worth considering
+- **Resource Implications**: Staffing and timeline considerations
+
+### Action Items:
+- **Immediate**: Changes needed before implementation starts
+- **Short-term**: Improvements for early phases
+- **Long-term**: Strategic enhancements for future iterations
+
+Focus on high-level strategic concerns, business alignment, and long-term architectural implications. Provide actionable recommendations with clear rationale and priority levels.