# Code Module SECURITY

**Version**: v1.1.9 | **Status**: Active | **Last Updated**: February 2026

## Security Overview

The code module handles potentially untrusted code execution and requires strict security controls.

## High-Risk Components

### sandbox/

- Executes untrusted code in isolated Docker containers
- Risk: Container escape, resource exhaustion
- Mitigation: Docker isolation, resource limits, network restrictions

### execution/

- Processes code execution requests
- Risk: Code injection, malicious input
- Mitigation: Input validation, sandboxing

### review/

- Analyzes external code
- Risk: Malicious code patterns
- Mitigation: Static analysis, safe parsing

## Security Controls

### Container Isolation

- All code execution in Docker containers
- No network access by default
- Resource limits (CPU, memory, time)
- Read-only filesystem where possible

### Input Validation

- Language validation before execution
- Code size limits
- Character encoding validation
- File path sanitization

### Resource Management

- Execution timeouts
- Memory limits
- Process limits
- Disk quota

## Best Practices

1. **Never trust user input** - Validate all code before execution
2. **Use least privilege** - Containers run with minimal permissions
3. **Monitor resources** - Track CPU, memory, and I/O usage
4. **Log everything** - Audit trail for all executions
5. **Regular updates** - Keep Docker images updated

## Navigation Links

- **Parent**: [Code Module](readme.md)
- **Root Security**: [SECURITY.md](../../../SECURITY.md)

## Detailed Architecture and Implementation



### Design Principles

1. **Strict Modularity**: Each component is isolated and communicates via well-defined APIs.
2. **Performance Optimization**: Implementation leverages lazy loading and intelligent caching to minimize resource overhead.
3. **Error Resilience**: Robust exception handling ensures system stability even under unexpected conditions.
4. **Extensibility**: The architecture is designed to accommodate future enhancements without breaking existing contracts.

### Technical Implementation

The codebase utilizes modern Python features (version 3.10+) to provide a clean, type-safe API. Interaction patterns are documented in the corresponding `AGENTS.md` and `SPEC.md` files, ensuring that both human developers and automated agents can effectively utilize these capabilities.
