Sharp edges

Sharp Edges

Overview

Identify error-prone APIs and dangerous configurations that could lead to bugs, security vulnerabilities, or system failures.

When to Use This Skill

Use this skill when you need to identify error-prone APIs and dangerous configurations.

Use this skill when:

• Reviewing code for potentially dangerous API usage
• Identifying configurations that could cause issues
• Analyzing code for error-prone patterns
• Assessing risk in API design or configuration choices
• Performing security audits focused on API misuse

Instructions

This skill helps identify problematic APIs and configurations:

1. API Analysis: Review API usage for error-prone patterns
2. Configuration Review: Identify dangerous or risky configurations
3. Pattern Recognition: Spot common mistakes and pitfalls
4. Risk Assessment: Evaluate the potential impact of identified issues

Common Sharp Edges

Error-Prone APIs

• APIs with complex parameter requirements
• APIs with non-obvious failure modes
• APIs that require careful resource management
• APIs with timing or concurrency issues
• APIs with unclear error handling

Dangerous Configurations

• Default settings that are insecure
• Configurations that bypass security controls
• Settings that enable dangerous features
• Options that reduce system reliability
• Parameters that affect performance negatively

Detection Strategies

1. Code Review: Look for known problematic patterns
2. Static Analysis: Use tools to identify risky API usage
3. Configuration Audits: Review configuration files for dangerous settings
4. Documentation Review: Check for warnings about API usage
5. Experience-Based: Leverage knowledge of common pitfalls

Best Practices

• Document identified sharp edges
• Provide clear guidance on safe usage
• Create examples of correct vs incorrect usage
• Recommend safer alternatives when available
• Update documentation with findings

Resources

For more information, see the source repository.