# TASK_7: create_session MCP Tool
**Created By**: Adder_3 | **Priority**: MEDIUM | **Duration**: 4 hours
**Technique Focus**: All ADDER+ techniques with emphasis on security boundaries and state management
**Size Constraint**: Target <250 lines, Max 400 if splitting awkward
## 🚦 Status & Assignment
**Status**: IN_PROGRESS
**Assigned**: Adder_3
**Dependencies**: TASK_4 (Agent & Session Management)
**Blocking**: None (other MCP tools can proceed in parallel)
## 📖 Required Reading (Complete before starting)
- [ ] **Architecture**: `ARCHITECTURE.md` - create_session tool specification
- [ ] **Types**: `src/types/session.py` - Session types and validation
- [ ] **Security**: `src/types/security.py` - Security context and boundaries
- [ ] **Manager**: `src/core/session_manager.py` - Session management implementation
- [ ] **Integration**: `src/core/manager_integration.py` - FastMCP integration patterns
## 🎯 Objective & Context
**Goal**: Implement the create_session MCP tool that creates sessions tied to specific codebases with security boundaries
**Context**: This tool establishes secure development sessions with filesystem boundaries, Git integration, and encrypted state storage
<thinking>
create_session Analysis:
1. Validates root_path exists and is accessible
2. Creates session directory structure if needed (.claude_session)
3. Initializes Git integration for project analysis
4. Establishes security context with filesystem boundaries
5. Creates encrypted state storage for session persistence
6. Initializes task file monitoring (TODO.md, TASK_*.md)
7. Registers session in global state manager
8. Returns comprehensive session creation result
</thinking>
## ✅ Implementation Subtasks (Sequential completion)
### Phase 1: Tool Implementation
- [x] **Subtask 1.1**: Create create_session tool with FastMCP integration
- [x] **Subtask 1.2**: Implement comprehensive input validation and security checks
- [x] **Subtask 1.3**: Add filesystem boundary establishment with path validation
- [x] **Subtask 1.4**: Integrate with SessionManager for session creation
### Phase 2: Security & State Management
- [x] **Subtask 2.1**: Implement secure state storage initialization
- [x] **Subtask 2.2**: Add Git integration detection and analysis
- [x] **Subtask 2.3**: Create task file monitoring setup
- [x] **Subtask 2.4**: Implement comprehensive error handling with recovery
### Phase 3: Testing & Documentation
- [x] **Subtask 3.1**: Add unit tests with property-based testing
- [x] **Subtask 3.2**: Create integration tests with security validation
- [x] **Subtask 3.3**: Add performance benchmarks for session creation
- [x] **Subtask 3.4**: Update documentation and API examples
## 🔧 Implementation Files & Specifications
**Files to Create/Modify**:
- ✅ `src/interfaces/mcp_tools.py` - Add create_session tool implementation
- ✅ `tests/interfaces/test_create_session.py` - Comprehensive tests
- ✅ `tests/interfaces/test_create_session_properties.py` - Property-based tests
- ✅ `docs/api/tools/create_session.md` - API documentation
**Key Requirements**:
- Must validate root_path exists and is accessible
- Must establish filesystem security boundaries
- Must create .claude_session directory for state storage
- Must detect and integrate with Git repositories
- Must handle duplicate session prevention
- Must provide comprehensive creation result
- Must support configurable security levels
## 🏗️ Modularity Strategy
**Size Management**:
- Keep tool implementation focused on orchestration
- Delegate business logic to SessionManager
- Use pure functions for validation and transformation
- Separate security checks into reusable functions
**Organization Principles**:
- Single responsibility: Session creation orchestration
- Clear separation between validation and execution
- Minimal coupling with manager implementations
- Maximum testability with dependency injection
## ✅ Success Criteria & Verification
**Completion Requirements**:
- ✅ Tool creates sessions with proper security boundaries
- ✅ Filesystem access properly restricted to root_path
- ✅ Git integration automatically detected and configured
- ✅ Session state encrypted and persisted
- ✅ Duplicate sessions properly prevented
- ✅ Comprehensive error messages for all failure cases
- ✅ Property-based tests validate all edge cases
- ✅ Performance meets <5 second creation time target
**Quality Gates**:
- ✅ Security: All paths validated against traversal attacks
- ✅ Reliability: Graceful handling of filesystem errors
- ✅ Performance: Session creation under 5 seconds
- ✅ Testing: 95%+ code coverage with property tests
- ✅ Documentation: Complete API docs with examples
## 🔄 Handoff Information
**Next Task Dependencies**: Other MCP tools can use created sessions
**Integration Points**: Works with SessionManager and security framework
**Future Considerations**: Multi-workspace session support may be added
## 📋 Implementation Template
```python
@server.tool()
async def create_session(
root_path: str,
session_name: str,
security_level: Optional[str] = "HIGH"
) -> Dict[str, Any]:
"""
Creates a new development session tied to specific codebase.
Args:
root_path: Absolute path to codebase root directory
session_name: Human-readable session name
security_level: Security level (HIGH, MEDIUM, LOW)
Returns:
SessionCreationResult with session details
Security:
- Validates root_path accessibility and permissions
- Establishes filesystem boundaries for session
- Creates encrypted state storage
- Prevents path traversal attacks
"""
try:
# Comprehensive implementation with all ADDER+ techniques
pass
except Exception as e:
# Proper error handling with security considerations
pass
```
**ADDER+ Technique Integration**:
1. **Contracts**: Pre/post conditions for all operations
2. **Defensive Programming**: Input validation and security checks
3. **Type Safety**: Full type annotations with validation
4. **Property Testing**: Comprehensive edge case coverage
5. **Functional Core**: Pure functions for business logic
