| name | dependency-auditor |
| description | Scan project dependencies for outdated, vulnerable, or unused packages across multiple languages. Use when auditing supply chain risk or cleaning up lockfiles. Trigger phrases: "audit dependencies", "check vulnerabilities", "find unused packages". |
Dependency Auditor
Skill Type: POWERFUL
Category: Engineering
Domain: Dependency Management & Security
Overview
The Dependency Auditor is a comprehensive toolkit for analyzing, auditing, and managing dependencies across multi-language software projects. This skill provides deep visibility into your project's dependency ecosystem, enabling teams to identify vulnerabilities, ensure license compliance, optimize dependency trees, and plan safe upgrades.
In modern software development, dependencies form complex webs that can introduce significant security, legal, and maintenance risks. A single project might have hundreds of direct and transitive dependencies, each potentially introducing vulnerabilities, license conflicts, or maintenance burden. This skill addresses these challenges through automated analysis and actionable recommendations.
Core Capabilities
1. Vulnerability Scanning & CVE Matching
Comprehensive Security Analysis
- Scans dependencies against built-in vulnerability databases
- Matches Common Vulnerabilities and Exposures (CVE) patterns
- Identifies known security issues across multiple ecosystems
- Analyzes transitive dependency vulnerabilities
- Provides CVSS scores and exploit assessments
- Tracks vulnerability disclosure timelines
- Maps vulnerabilities to dependency paths
Multi-Language Support
- JavaScript/Node.js: package.json, package-lock.json, yarn.lock
- Python: requirements.txt, pyproject.toml, Pipfile.lock, poetry.lock
- Go: go.mod, go.sum
- Rust: Cargo.toml, Cargo.lock
- Ruby: Gemfile, Gemfile.lock
- Java/Maven: pom.xml, gradle.lockfile
- PHP: composer.json, composer.lock
- C#/.NET: packages.config, project.assets.json
2. License Compliance & Legal Risk Assessment
License Classification System
- Permissive Licenses: MIT, Apache 2.0, BSD (2-clause, 3-clause), ISC
- Copyleft (Strong): GPL (v2, v3), AGPL (v3)
- Copyleft (Weak): LGPL (v2.1, v3), MPL (v2.0)
- Proprietary: Commercial, custom, or restrictive licenses
- Dual Licensed: Multi-license scenarios and compatibility
- Unknown/Ambiguous: Missing or unclear licensing
Conflict Detection
- Identifies incompatible license combinations
- Warns about GPL contamination in permissive projects
- Analyzes license inheritance through dependency chains
- Provides compliance recommendations for distribution
- Generates legal risk matrices for decision-making
3. Outdated Dependency Detection
Version Analysis
- Identifies dependencies with available updates
- Categorizes updates by severity (patch, minor, major)
- Detects pinned versions that may be outdated
- Analyzes semantic versioning patterns
- Identifies floating version specifiers
- Tracks release frequencies and maintenance status
Maintenance Status Assessment
- Identifies abandoned or unmaintained packages
- Analyzes commit frequency and contributor activity
- Tracks last release dates and security patch availability
- Identifies packages with known end-of-life dates
- Assesses upstream maintenance quality
4. Dependency Bloat Analysis
Unused Dependency Detection
- Identifies dependencies that aren't actually imported/used
- Analyzes import statements and usage patterns
- Detects redundant dependencies with overlapping functionality
- Identifies oversized packages for simple use cases
- Maps actual vs. declared dependency usage
Redundancy Analysis
- Identifies multiple packages providing similar functionality
- Detects version conflicts in transitive dependencies
- Analyzes bundle size impact of dependencies
- Identifies opportunities for dependency consolidation
- Maps dependency overlap and duplication
5. Upgrade Path Planning & Breaking Change Risk
Semantic Versioning Analysis
- Analyzes semver patterns to predict breaking changes
- Identifies safe upgrade paths (patch/minor versions)
- Flags major version updates requiring attention
- Tracks breaking changes across dependency updates
- Provides rollback strategies for failed upgrades
Risk Assessment Matrix
- Low Risk: Patch updates, security fixes
- Medium Risk: Minor updates with new features
- High Risk: Major version updates, API changes
- Critical Risk: Dependencies with known breaking changes
Upgrade Prioritization
- Security patches: Highest priority
- Bug fixes: High priority
- Feature updates: Medium priority
- Major rewrites: Planned priority
- Deprecated features: Immediate attention
6. Supply Chain Security
Dependency Provenance
- Verifies package signatures and checksums
- Analyzes package download sources and mirrors
- Identifies suspicious or compromised packages
- Tracks package ownership changes and maintainer shifts
- Detects typosquatting and malicious packages
Transitive Risk Analysis
- Maps complete dependency trees
- Identifies high-risk transitive dependencies
- Analyzes dependency depth and complexity
- Tracks influence of indirect dependencies
- Provides supply chain risk scoring
7. Lockfile Analysis & Deterministic Builds
Lockfile Validation
- Ensures lockfiles are up-to-date with manifests
- Validates integrity hashes and version consistency
- Identifies drift between environments
- Analyzes lockfile conflicts and resolution strategies
- Ensures deterministic, reproducible builds
Environment Consistency
- Compares dependencies across environments (dev/staging/prod)
- Identifies version mismatches between team members
- Validates CI/CD environment consistency
- Tracks dependency resolution differences
Technical Architecture
Scanner Engine (dep_scanner.py)
- Multi-format parser supporting 8+ package ecosystems
- Built-in vulnerability database with 500+ CVE patterns
- Transitive dependency resolution from lockfiles
- JSON and human-readable output formats
- Configurable scanning depth and exclusion patterns
License Analyzer (license_checker.py)
- License detection from package metadata and files
- Compatibility matrix with 20+ license types
- Conflict detection engine with remediation suggestions
- Risk scoring based on distribution and usage context
- Export capabilities for legal review
Upgrade Planner (upgrade_planner.py)
- Semantic version analysis with breaking change prediction
- Dependency ordering based on risk and interdependence
- Migration checklists with testing recommendations
- Rollback procedures for failed upgrades
- Timeline estimation for upgrade cycles
Use Cases & Applications
Security Teams
- Vulnerability Management: Continuous scanning for security issues
- Incident Response: Rapid assessment of vulnerable dependencies
- Supply Chain Monitoring: Tracking third-party security posture
- Compliance Reporting: Automated security compliance documentation
Legal & Compliance Teams
- License Auditing: Comprehensive license compliance verification
- Risk Assessment: Legal risk analysis for software distribution
- Due Diligence: Dependency licensing for M&A activities
- Policy Enforcement: Automated license policy compliance
Development Teams
- Dependency Hygiene: Regular cleanup of unused dependencies
- Upgrade Planning: Strategic dependency update scheduling
- Performance Optimization: Bundle size optimization through dep analysis
- Technical Debt: Identifying and prioritizing dependency technical debt
DevOps & Platform Teams
- Build Optimization: Faster builds through dependency optimization
- Security Automation: Automated vulnerability scanning in CI/CD
- Environment Consistency: Ensuring consistent dependencies across environments
- Release Management: Dependency-aware release planning
Integration Patterns
CI/CD Pipeline Integration
python dep_scanner.py /project --format json --fail-on-high
python license_checker.py /project --policy strict --format json
Scheduled Audits
./audit_dependencies.sh > weekly_report.html
python upgrade_planner.py deps.json --timeline 30days
Development Workflow
python dep_scanner.py . --quick-scan
python license_checker.py . --warn-conflicts
Advanced Features
Custom Vulnerability Databases
- Support for internal/proprietary vulnerability feeds
- Custom CVE pattern definitions
- Organization-specific risk scoring
- Integration with enterprise security tools
Policy-Based Scanning
- Configurable license policies by project type
- Custom risk thresholds and escalation rules
- Automated policy enforcement and notifications
- Exception management for approved violations
Reporting & Dashboards
- Executive summaries for management
- Technical reports for development teams
- Trend analysis and dependency health metrics
- Integration with project management tools
Multi-Project Analysis
- Portfolio-level dependency analysis
- Shared dependency impact analysis
- Organization-wide license compliance
- Cross-project vulnerability propagation
Best Practices
Scanning Frequency
- Security Scans: Daily or on every commit
- License Audits: Weekly or monthly
- Upgrade Planning: Monthly or quarterly
- Full Dependency Audit: Quarterly
Risk Management
- Prioritize Security: Address high/critical CVEs immediately
- License First: Ensure compliance before functionality
- Gradual Updates: Incremental dependency updates
- Test Thoroughly: Comprehensive testing after updates
- Monitor Continuously: Automated monitoring and alerting
Team Workflows
- Security Champions: Designate dependency security owners
- Review Process: Mandatory review for new dependencies
- Update Cycles: Regular, scheduled dependency updates
- Documentation: Maintain dependency rationale and decisions
- Training: Regular team education on dependency security
Metrics & KPIs
Security Metrics
- Mean Time to Patch (MTTP) for vulnerabilities
- Number of high/critical vulnerabilities
- Percentage of dependencies with known vulnerabilities
- Security debt accumulation rate
Compliance Metrics
- License compliance percentage
- Number of license conflicts
- Time to resolve compliance issues
- Policy violation frequency
Maintenance Metrics
- Percentage of up-to-date dependencies
- Average dependency age
- Number of abandoned dependencies
- Upgrade success rate
Efficiency Metrics
- Bundle size reduction percentage
- Unused dependency elimination rate
- Build time improvement
- Developer productivity impact
Troubleshooting Guide
Common Issues
- False Positives: Tuning vulnerability detection sensitivity
- License Ambiguity: Resolving unclear or multiple licenses
- Breaking Changes: Managing major version upgrades
- Performance Impact: Optimizing scanning for large codebases
Resolution Strategies
- Whitelist false positives with documentation
- Contact maintainers for license clarification
- Implement feature flags for risky upgrades
- Use incremental scanning for large projects
Future Enhancements
Planned Features
- Machine learning for vulnerability prediction
- Automated dependency update pull requests
- Integration with container image scanning
- Real-time dependency monitoring dashboards
- Natural language policy definition
Ecosystem Expansion
- Additional language support (Swift, Kotlin, Dart)
- Container and infrastructure dependencies
- Development tool and build system dependencies
- Cloud service and SaaS dependency tracking
Quick Start
python scripts/dep_scanner.py /path/to/project
python scripts/license_checker.py /path/to/project --policy strict
python scripts/upgrade_planner.py deps.json --risk-threshold medium
For detailed usage instructions, see README.md.
This skill provides comprehensive dependency management capabilities essential for maintaining secure, compliant, and efficient software projects. Regular use helps teams stay ahead of security threats, maintain legal compliance, and optimize their dependency ecosystems.
