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SECURITY.md

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Code Module SECURITY

Version: v1.2.3 | Status: Active | Last Updated: March 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

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.