Security Policy

Security Policy

Overview

The Skills Directory takes security seriously. Every skill is analyzed for potential risks, and high-risk skills require additional safeguards. This document explains our security framework and policies.

Security Risk Levels

Low Risk

Definition: Read-only operations, public data access, no external API calls

Examples:

• List available skills
• Format/transform data
• Calculate metrics
• Display information

Requirements:

• No special requirements
• Standard execution allowed
• Audit logging optional

Medium Risk

Definition: Write operations, internal data access, external API calls without sensitive data

Examples:

• Send notifications
• Update non-critical records
• Query analytics
• Create tickets

Requirements:

• ✅ Audit logging enabled
• Standard execution allowed
• No sandboxing required

High Risk

Definition: Modify/delete operations, PII access, sensitive data handling, risky external calls

Examples:

• Update customer records
• Access PII data
• Modify financial data
• Delete resources
• Execute external webhooks

Requirements:

• ✅ Sandboxing required
• ✅ Audit logging enabled
• ⚠️ Human-in-loop recommended
• Access controls enforced

Critical Risk

Definition: Financial operations, credential handling, destructive actions, regulatory data

Examples:

• Process payments
• Access credentials/secrets
• Delete production data
• Modify financial records
• Execute system commands

Requirements:

• ✅ Sandboxing required
• ✅ Human-in-loop required
• ✅ Audit logging enabled
• ✅ Multi-party approval
• Access restricted to authorized personnel

Security Requirements

Sandboxing

Isolates skill execution to prevent:

• Unauthorized system access
• Data leakage
• Privilege escalation
• Resource exhaustion

Implementation: Skills run in isolated containers with limited permissions.

Human-in-Loop (HITL)

Requires explicit human approval before execution.

When Required:

• Critical risk level skills
• Financial transactions
• Destructive operations
• Regulatory compliance needs

Process:

1. Skill execution initiated
2. Request sent to authorized approvers
3. Approver reviews context and impact
4. Approval or rejection
5. Execution proceeds or aborts

Audit Logging

All executions are logged with:

• Skill ID and version
• Execution timestamp
• Input parameters (sanitized)
• Output results (sanitized)
• User/system that invoked
• Security context
• Success/failure status

Retention: Logs retained per compliance requirements (typically 90-365 days)

Access: Restricted to security team and authorized auditors

Data Access Scope

Skills must declare what types of data they access:

Access Control: Skills can only access scopes they declare, enforced at runtime.

Security Analysis Process

Automated Analysis

The analyze_skills.py script performs:

1. Keyword Detection

   • Scans skill.json and instructions.md
   • Identifies risk keywords (delete, financial, credential, etc.)
   • Weights keywords by severity

2. Tool Risk Assessment

   • Analyzes required tools
   • Identifies risky operations
   • Checks for external API calls

3. Risk Level Assignment

   • Aggregates risk factors
   • Assigns risk level (Low/Medium/High/Critical)
   • Generates risk factor list

4. Security Requirements

   • Determines sandboxing needs
   • Sets HITL requirements
   • Configures audit logging
   • Defines data access scope

5. Metadata Generation

   • Creates metadata.yaml with analysis results
   • Updates security indices
   • Generates reports

Manual Review

All skills undergo manual security review before production:

1. Automated Analysis: Initial scan by analyzer
2. Peer Review: Code review by contributor
3. Security Review: Review by security team for High/Critical skills
4. Approval: Sign-off by maintainers

Workflow Security

Workflow Risk Level

A workflow's risk level is the highest risk level of any skill in the chain.

Example:

Skill A (Low) → Skill B (Medium) → Skill C (High)
= Workflow Risk Level: High

Security Context

Workflows define security context:

security_context:
  max_risk_level: 'Medium' # Maximum allowed skill risk
  requires_approval: true # Entire workflow needs approval
  approval_at_steps: # Individual step approvals
    - 'step_3_delete_data'

Approval Gates

Workflows can require approval at specific steps:

• Before execution (entire workflow)
• At individual steps (step-level gates)
• After failures (recovery actions)

Malicious Skill Detection

Prohibited Actions

Skills MAY NOT:

• Execute arbitrary code
• Access filesystem outside sandbox
• Make network requests to undeclared endpoints
• Extract or exfiltrate data
• Perform cryptomining or resource abuse
• Attempt privilege escalation
• Bypass security controls

Detection Mechanisms

• Static analysis for malicious patterns
• Runtime sandboxing
• Network egress filtering
• Resource usage monitoring
• Behavioral analysis

Reporting

If you discover a security vulnerability:

1. DO NOT open a public issue
2. Email: security@skene.ai
3. Include:
   • Skill ID and version
   • Vulnerability description
   • Reproduction steps
   • Potential impact
4. We will respond within 48 hours

Rewards

We offer recognition (and potentially rewards) for:

• Critical vulnerability discoveries
• Security enhancement proposals
• Malicious skill detection

Supply Chain Security

Skill Provenance

All skills include:

• Author identification
• Source attribution
• License information
• Version history

Dependency Management

Skills declare dependencies:

• Other skills required
• External tools/APIs
• Minimum versions

Dependencies are:

• Validated at registration
• Checked for vulnerabilities
• Pinned to specific versions

Code Signing (Future)

Future releases will support:

• Cryptographic signing of skills
• Verification at execution time
• Trusted skill registries

Compliance

Regulatory Frameworks

Skills handling regulated data must comply with:

• GDPR: Personal data of EU residents
• HIPAA: Health information (US)
• SOC 2: Security controls
• PCI DSS: Payment card data

Data Residency

Skills declare data residency requirements:

compliance:
  regulations:
    - 'GDPR'
    - 'HIPAA'
  data_residency:
    - 'EU'
    - 'US'

Execution restricted to compliant regions.

Security Updates

Versioning

Security-related changes increment version:

• Patch (1.0.x): Security fix, no breaking changes
• Minor (1.x.0): New security requirements
• Major (x.0.0): Breaking security changes

Deprecation

Skills with unresolvable security issues:

1. Marked as deprecated
2. Removed from recommendations
3. Execution disabled (with grace period)
4. Deleted after 90 days

Security Advisories

Critical issues are disclosed via:

• GitHub Security Advisories
• Email to skill authors
• Community notifications
• CVE assignment (if applicable)

Best Practices

For Skill Authors

✅ Do:

• Declare all data access explicitly
• Follow principle of least privilege
• Validate all inputs
• Sanitize all outputs
• Handle errors gracefully
• Document security considerations

❌ Don't:

• Store credentials in skill code
• Access undeclared data
• Execute arbitrary user input
• Make assumptions about security context

For Skill Users

✅ Do:

• Review security metadata before execution
• Approve HITL requests promptly
• Monitor execution logs
• Report suspicious behavior

❌ Don't:

• Override security controls
• Share approval credentials
• Execute untrusted skills
• Ignore security warnings

Questions?

For security questions:

• 📧 Email: security@skene.ai
• 📖 Read: CONTRIBUTING.md
• 💬 Discuss: GitHub Discussions (non-sensitive only)

Remember: When in doubt, err on the side of caution. It's better to over-classify a skill's risk than under-classify it.