feat: enhance workflow planning with concept clarification and agent delegation

🎯 Major Enhancements:

1. Concept Clarification Quality Gate (concept-clarify.md)
   - Added dual-mode support: brainstorm & plan modes
   - Auto-detects mode based on artifact presence (ANALYSIS_RESULTS.md vs synthesis-specification.md)
   - Backward compatible with existing brainstorm workflow
   - Updates appropriate artifacts based on detected mode

2. Planning Workflow Enhancement (plan.md)
   - Added Phase 3.5: Concept Clarification as quality gate
   - Integrated Phase 3.5 between analysis and task generation
   - Enhanced with interactive Q&A to resolve ambiguities
   - Updated from 4-phase to 5-phase workflow model
   - Delegated Phase 3 (Intelligent Analysis) to cli-execution-agent
   - Autonomous context discovery and enhanced prompt generation

3. Documentation Updates (README.md, README_CN.md)
   - Added /workflow:test-cycle-execute command documentation
   - Explained dynamic task generation and iterative fix cycles
   - Included usage examples and key features
   - Updated both English and Chinese versions

🔧 Technical Details:
- concept-clarify now supports both ANALYSIS_RESULTS.md (plan) and synthesis-specification.md (brainstorm)
- plan.md Phase 3 now uses cli-execution-agent for MCP-powered context discovery
- Maintains auto-continue mechanism with one interactive quality gate (Phase 3.5)
- All changes preserve backward compatibility

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

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

README.md

@@ -400,13 +400,23 @@ cd .workflow/WFS-auth/.design/prototypes && python -m http.server 8080
 **Phase 5: Testing & Quality Assurance**
 ```bash
 # Generate independent test-fix workflow (v3.2.2+)
-/workflow:test-gen WFS-auth         # Creates WFS-test-auth session
-/workflow:test-cycle-execute        # Execute test-fix cycle with iterative validation
+/workflow:test-gen WFS-auth          # Creates WFS-test-auth session
+/workflow:test-cycle-execute         # Execute test-fix cycle with dynamic iteration
+
+# Resume interrupted test session
+/workflow:test-cycle-execute --resume-session="WFS-test-auth"
 
 # OR verify TDD compliance (TDD workflow)
 /workflow:tdd-verify
 ```
 
+**What is `/workflow:test-cycle-execute`?**
+- **Dynamic Task Generation**: Creates intermediate fix tasks based on test failures during execution
+- **Iterative Testing**: Automatically runs test-fix cycles until all tests pass or max iterations reached
+- **CLI-Driven Analysis**: Uses Gemini/Qwen to analyze failures and generate fix strategies
+- **Agent Coordination**: Delegates test execution and fixes to `@test-fix-agent`
+- **Autonomous Completion**: Continues until success without user interruption
+
 ### Quick Start for Simple Tasks
 
 **Feature Development:**
@@ -484,6 +494,7 @@ cd .workflow/WFS-auth/.design/prototypes && python -m http.server 8080
 | `/workflow:execute` | Execute the current workflow plan autonomously. |
 | `/workflow:status` | Display the current status of the workflow. |
 | `/workflow:test-gen [--use-codex] <session>` | Create test generation workflow with auto-diagnosis and fix cycle for completed implementations. |
+| `/workflow:test-cycle-execute` | **v4.5.0** Execute test-fix workflow with dynamic task generation and iterative fix cycles. Runs tests → analyzes failures with CLI → generates fix tasks → retests until success. |
 | `/workflow:tdd-verify` | Verify TDD compliance and generate quality report. |
 | `/workflow:review` | **Optional** manual review (only use when explicitly needed - passing tests = approved code). |
 | `/workflow:tools:test-context-gather` | Analyze test coverage and identify missing test files. |