refactor: Enhance workflow system with comprehensive improvements

Agent enhancements:
- Add free exploration phase for supplementary context gathering
- Update project structure documentation with detailed hierarchy
- Improve summary template with standardized naming convention
- Add comprehensive search strategies with bash command examples

Architecture improvements:
- Add extensive combined search strategy examples (rg, grep, find, awk, sed)
- Enhance flow control with pattern discovery commands
- Update path reference format for session-specific commands
- Improve session naming rules with WFS prefix explanation
- Reorganize document structure for better readability

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

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

.claude/agents/code-review-test-agent.md

@@ -58,6 +58,7 @@ When task assignment includes flow control marker:
 - **Context variable handling**: Process [variable_name] references in commands
 - **Sequential execution**: Execute each step in order, accumulating context through variables
 - **Error handling**: Apply per-step error strategies
+- **Free Exploration Phase**: After completing pre_analysis steps, can enter additional exploration using bash commands (grep, find, rg, awk, sed) or CLI tools to gather supplementary context for more thorough review
 
 **Context Gathering Decision Logic**:
 ```