* feat(workflow): implement Phase 6 built-in actions

Comprehensive implementation of built-in workflow actions:

## New Action Implementations
- **Shell Actions** ()
  - Enhanced execution with variable substitution
  - Dangerous command detection (rm -rf, dd if=, etc.)
  - Proper error handling with result storage

- **AI Prompt Actions** ()
  - AI model integration with proper agent context
  - Variable expansion in prompts
  - Model switching support within prompts

- **Git Actions** ()
  - , , ,  implementations
  - GitHub CLI integration with proper error handling
  - Message variable substitution

- **PR Actions** ()
  - , ,  actions
  - GitHub CLI integration via gh command
  - Title/body/base parameter expansion

## Integration
- Updated  with proper imports/registration
- Full TypeScript type safety with proper casting
- Variable substitution support for all actions: {{variable}} patterns

## Demo Workflows
-  - Git automation workflow
-  - AI-assisted workflows
-  - Comprehensive multi-action demo

## Testing
- All 27 existing workflow tests passing ✅
- TypeScript compilation successful ✅
- Build verification complete ✅

This completes Phase 6 of the workflow system, providing production-ready
built-in actions for common automation scenarios.

Wingman: Codi <codi@layne.pro>

* feat(workflow): enhance Git and PR actions with security improvements

* test(workflow): fix mock issues and enhance test coverage

Fixed mock implementation issues and improved test coverage:

## Bug Fixes
- Fixed mock issues in test file
- Proper mocking of fs and child_process modules
- Replaced problematic vi.mocked() calls with direct mocks

## Test Enhancements
- Increased from 16 to 20 comprehensive tests
- Added security validation tests (branch names, PR titles)
- Added tests for variable substitution syntax
- Added edge case testing for control characters

## Security Tests
- Tests for command injection prevention in branch names
- Tests for PR title length validation (max 256 chars)
- Tests for control character rejection
- Tests for special character validation

All 47 workflow tests passing ✅

* test(workflow): add comprehensive edge case tests

Added 13 comprehensive edge case tests covering:

## Security Validation
- Branch name injection prevention (command injection patterns)
- PR title validation (whitespace, control characters, max length)
- Command injection detection (rm -rf, pipe commands)

## Variable Substitution Edge Cases
- Undefined/null/empty variable handling
- Multiple variable expansion scenarios
- Special character handling

## Test Coverage
- 13 focused edge case tests
- All 60 workflow tests passing ✅
- Build verification successful ✅

This completes the security testing suite for Phase 6.

* feat(workflow): initial Phase 7 AI-assisted workflow builder

## Phase 7 Implementation - AI-Assisted Building

This implements the core foundation for Phase 7 with:

### ✅ New Command: /workflow-build
- Command registration with /wbuild alias
- Template-based workflow generation
- Basic natural language workflow creation
- Usage: /workflow-build "description" or /workflow-build template (name)

### ✅ Template System
- Pre-built workflow templates:
  - deployment: Git deployment workflow with testing
  - documentation: Documentation generation workflow
  - refactor: Code refactoring workflow
- Template listing command: /workflow-build template list

### ✅ File Generation
- Automatic YAML workflow file creation
- Standard workflows directory setup
- Proper workflow naming conventions

### 🔲 Next Steps Needed
- Real AI integration for natural language parsing
- Interactive step-by-step builder UI
- Advanced validation suggestions

### 🧪 Testing
- Unit tests covering command functionality
- Build verification successful
- All existing workflow tests still passing

Phase 7 foundations complete - ready for AI integration!

* docs(evolution): update workflow system implementation status

Updated workflow system evolution document #1-interactive-workflow-system.md:
- Phase 1-6: COMPLETED with full functionality
- Phase 7: STARTED with AI-assisted builder foundation
- Overall: 85% complete with extensive testing coverage