# Sbom Generator

> Skill: SBOM Generator Agent

- Skill: `farmountain/sbom-generator` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add farmountain/sbom-generator`
- Raw SKILL.md: https://api.skillmd.com/api/skills/farmountain/sbom-generator/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: farmountain (https://skillmd.com/u/farmountain)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/farmountain/sbom-generator

---

# Skill: SBOM Generator Agent

## Purpose
Automated Software Bill of Materials (SBOM) generation and management for comprehensive software supply chain transparency and security. The SBOM Generator creates detailed inventories of all software components, dependencies, and licenses to enable vulnerability tracking, license compliance, and supply chain risk management.

## Core Capabilities
1. **SBOM Generation**: Create CycloneDX and SPDX format SBOMs for applications and containers
2. **Dependency Analysis**: Deep dependency scanning and component identification
3. **License Management**: License detection, compatibility analysis, and compliance reporting
4. **Vulnerability Correlation**: Link SBOM components to known vulnerabilities (CVEs)
5. **Supply Chain Security**: Track component provenance and integrity verification
6. **Compliance Automation**: Automated compliance checking against SBOM requirements

## Inputs (REQUIRED)
- **Application Codebase**: Source code, package manifests, build artifacts
- **Container Images**: Docker images, container registries, base images
- **Build Environment**: CI/CD pipelines, build tools, dependency management
- **Compliance Requirements**: Regulatory requirements, security policies, license policies

## Operating Protocol

### Phase 1: Component Discovery & Analysis
1. **Codebase Scanning**: Analyze source code for direct dependencies and imports
2. **Package Manifest Parsing**: Extract dependencies from package.json, requirements.txt, pom.xml, etc.
3. **Build Artifact Analysis**: Scan compiled artifacts, JARs, containers for embedded components
4. **Transitive Dependency Resolution**: Identify all indirect dependencies and their versions

### Phase 2: SBOM Generation & Enrichment
1. **SBOM Creation**: Generate SBOM in CycloneDX or SPDX format
2. **Metadata Enrichment**: Add component metadata, licenses, authors, and provenance
3. **Vulnerability Correlation**: Link components to known CVEs and security advisories
4. **License Analysis**: Identify license types and check compatibility

### Phase 3: Validation & Distribution
1. **SBOM Validation**: Verify SBOM completeness and accuracy
2. **Compliance Checking**: Validate against organizational and regulatory requirements
3. **Distribution**: Publish SBOMs to artifact repositories and compliance systems
4. **Continuous Monitoring**: Monitor for new vulnerabilities and license changes

## SBOM Standards & Formats

### CycloneDX
**Format**: XML, JSON, Protocol Buffers
- **Strengths**: Security-focused, comprehensive vulnerability data, machine-readable
- **Use Cases**: Security scanning, vulnerability management, compliance reporting
- **Tools**: OWASP Dependency-Track, CycloneDX CLI, various security scanners

### SPDX
**Format**: Tag-value, RDF/XML, JSON, YAML
- **Strengths**: License-focused, comprehensive license data, SPDX license list
- **Use Cases**: License compliance, open source management, legal compliance
- **Tools**: SPDX tools, ScanCode, FOSSology

### Comparison Matrix
| Aspect | CycloneDX | SPDX |
|--------|-----------|------|
| **Primary Focus** | Security/Vulnerabilities | Licensing |
| **Vulnerability Data** | Rich (CVSS, CWE, advisories) | Basic (references only) |
| **License Data** | Good (SPDX license refs) | Excellent (full SPDX license list) |
| **Adoption** | Security tools, SBOM mandates | License tools, compliance |
| **File Size** | Smaller (focused) | Larger (comprehensive) |

## Component Types & Discovery Methods

### Direct Dependencies
**Source**: Package manifests, lock files, build files
- **JavaScript/Node.js**: package.json, package-lock.json, yarn.lock
- **Python**: requirements.txt, Pipfile, poetry.lock
- **Java**: pom.xml, build.gradle, gradle.lockfile
- **.NET**: packages.config, .csproj, packages.lock.json
- **Go**: go.mod, go.sum
- **Rust**: Cargo.toml, Cargo.lock

### Transitive Dependencies
**Discovery**: Dependency resolution and graph analysis
- **Tools**: npm ls, pipdeptree, Maven dependency plugin, cargo tree
- **Challenges**: Version conflicts, optional dependencies, conditional imports
- **Validation**: Compare resolved vs. declared dependencies

### Container Components
**Analysis**: Container image scanning and layer inspection
- **Base Images**: Operating system packages, base image components
- **Application Layers**: Copied files, installed packages, embedded dependencies
- **Tools**: Docker inspect, container scanners, SBOM generators

### Build-time Dependencies
**Detection**: Build tool analysis and artifact inspection
- **Build Tools**: Webpack bundles, JAR files, compiled binaries
- **Embedded Components**: Vendored code, bundled libraries, asset files
- **Tools**: Webpack bundle analyzer, JAR analysis tools, binary scanners

## Vulnerability Management Integration

### CVE Correlation
**Data Sources**: NVD, OSV, GitHub Security Advisories
- **Matching**: Package name, version ranges, ecosystem identification
- **Severity**: CVSS scores, exploitability metrics, impact assessment
- **Remediation**: Available patches, workarounds, mitigation strategies

### Vulnerability Scanning
**Tools Integration**: Snyk, OWASP Dependency-Check, Trivy, Grype
- **SBOM Enhancement**: Add vulnerability data to SBOM components
- **Risk Assessment**: Calculate aggregate risk scores for applications
- **Reporting**: Generate vulnerability reports and remediation plans

### Continuous Monitoring
**Vulnerability Feeds**: Real-time updates from security databases
- **Alerting**: New vulnerabilities affecting SBOM components
- **Compliance**: Track vulnerability remediation SLAs
- **Auditing**: Historical vulnerability data for compliance reporting

## License Compliance & Management

### License Detection
**Methods**: License file analysis, package metadata, SPDX license matching
- **License Files**: LICENSE, COPYING, license files in packages
- **Package Metadata**: License fields in package manifests
- **Fallback**: License text analysis and pattern matching

### License Compatibility
**Analysis**: Check license compatibility between components
- **Compatible Groups**: Permissive (MIT, BSD), Copyleft (GPL), Commercial
- **Conflict Detection**: Identify incompatible license combinations
- **Remediation**: License change requests, component replacement

### Compliance Reporting
**Requirements**: Organizational license policies, regulatory requirements
- **Allow Lists**: Approved licenses and components
- **Deny Lists**: Prohibited licenses and vulnerable components
- **Auditing**: License compliance reports and audit trails

## Supply Chain Security

### Component Provenance
**Verification**: Cryptographic signatures, trusted sources, build attestations
- **Signed Packages**: GPG signatures, Sigstore attestations
- **Trusted Registries**: Private registries, verified publishers
- **Build Integrity**: Reproducible builds, SLSA attestations

### Dependency Confusion
**Prevention**: Namespace isolation, private package registries
- **Internal Packages**: Private namespaces, internal registries
- **Dependency Locking**: Lock files, integrity hashes
- **Monitoring**: Alert on unexpected package sources

### Tamper Detection
**Integrity Checks**: Cryptographic hashes, digital signatures
- **Package Integrity**: SHA256 hashes, Merkle trees
- **Chain of Custody**: Track component movement through supply chain
- **Incident Response**: Tamper detection and response procedures

## Position Card Schema

### Position Card: SBOM Generator
- **Claims**:
  - Generated SBOM with [N] components in [format] for [application]
  - Identified [M] vulnerabilities with [severity distribution]
  - Detected [K] license types with [compatibility status]
  - Achieved [compliance level] against [requirements]
- **Plan**:
  - Scan codebase and dependencies to identify all software components
  - Generate comprehensive SBOM in appropriate format with metadata
  - Correlate components with vulnerability databases and license information
  - Validate SBOM against compliance requirements and organizational policies
- **Evidence pointers**:
  - projects/[project]/sbom/ (generated SBOM files in CycloneDX/SPDX format)
  - projects/[project]/vulnerability_report.md (correlated vulnerabilities and remediation)
  - projects/[project]/license_report.md (license analysis and compatibility)
  - projects/[project]/compliance_status.md (compliance validation results)
- **Risks**:
  - Incomplete component discovery may miss vulnerable dependencies
  - Outdated vulnerability data may not reflect current threats
  - License detection accuracy may vary by package quality
- **Confidence**: 0.85 (based on comprehensive scanning and established SBOM standards)
- **Cost**: Medium (60 hours for initial SBOM generation and ongoing monitoring)
- **Reversibility**: High (SBOM generation is non-destructive and can be regenerated)
- **Invariant violations**: None
- **Required approvals**: security_review (security team approval for SBOM accuracy)

## Failure Modes & Recovery

### Failure Mode 1: Incomplete Component Discovery
**Symptom**: SBOM missing components or dependencies
**Trigger**: Complex build processes, dynamic imports, or custom package sources
**Recovery**:
1. Enhance scanning with additional tools and manual analysis
2. Implement custom discovery rules for unique dependency patterns
3. Validate SBOM completeness through manual review and testing
4. Update scanning procedures for future projects

### Failure Mode 2: Outdated Vulnerability Data
**Symptom**: SBOM shows outdated or missing vulnerability information
**Trigger**: Delayed vulnerability database updates or scanning tool issues
**Recovery**:
1. Update vulnerability databases and scanning tools
2. Implement real-time vulnerability monitoring and alerting
3. Cross-reference multiple vulnerability sources for completeness
4. Establish regular SBOM refresh and update procedures

### Failure Mode 3: License Detection Errors
**Symptom**: Incorrect or missing license information in SBOM
**Trigger**: Non-standard license files or complex license expressions
**Recovery**:
1. Implement manual license review for critical components
2. Use multiple license detection tools for cross-validation
3. Establish license review procedures for ambiguous cases
4. Maintain approved license list for automated validation

## Integration with Workflows

### WF-004: Security Implementation
**Role**: SBOM generation for security assessment and vulnerability management
**Input**: Application components, dependencies, security requirements
**Output**: Comprehensive SBOM with vulnerability correlations
**Integration**: Provides security teams with complete component inventory

### WF-008: Compliance & Audit Preparation
**Role**: License compliance and regulatory SBOM requirements
**Input**: Compliance requirements, license policies, regulatory standards
**Output**: Compliance reports and audit-ready SBOM documentation
**Integration**: Ensures compliance with SBOM mandates and license requirements

### WF-012: Incident Response
**Role**: Rapid vulnerability assessment during security incidents
**Input**: Incident details, affected systems, vulnerability information
**Output**: Impact assessment and remediation prioritization
**Integration**: Enables rapid identification of affected components

## Quality Gates

### SBOM Completeness Validation
- **Component Coverage**: All direct and transitive dependencies identified
- **Metadata Quality**: Complete component information and provenance data
- **Format Compliance**: Valid CycloneDX or SPDX format and schema
- **Update Frequency**: Regular SBOM regeneration and vulnerability updates

### Vulnerability Management Validation
- **CVE Coverage**: All known vulnerabilities for components identified
- **Severity Accuracy**: Correct CVSS scores and impact assessments
- **Remediation Tracking**: Available patches and workarounds documented
- **False Positive Rate**: Minimal incorrect vulnerability correlations

### License Compliance Validation
- **License Accuracy**: Correct license identification for all components
- **Compatibility Analysis**: Proper license compatibility assessments
- **Policy Compliance**: Adherence to organizational license policies
- **Audit Trail**: Complete documentation of license decisions

## Evidence Requirements

### SBOM Generation Evidence
- **Component Inventory**: Complete list of all software components and versions
- **Dependency Graph**: Visual representation of component relationships
- **Metadata Documentation**: Component descriptions, authors, and maintainers
- **Generation Process**: Tools used, parameters, and validation procedures

### Vulnerability Analysis Evidence
- **Vulnerability Database**: Sources used for vulnerability information
- **Correlation Results**: How components were matched to vulnerabilities
- **Severity Assessment**: CVSS scores and business impact analysis
- **Remediation Plans**: Available fixes and mitigation strategies

### License Compliance Evidence
- **License Inventory**: All licenses identified and categorized
- **Compatibility Matrix**: License compatibility analysis results
- **Policy Compliance**: Adherence to organizational license policies
- **Exception Documentation**: Approved exceptions and justifications

## Success Metrics

### SBOM Quality Metrics
- **Component Completeness**: Percentage of dependencies discovered and documented
- **Metadata Richness**: Average metadata fields populated per component
- **Format Validation**: Percentage of SBOMs passing schema validation
- **Update Frequency**: Average days between SBOM updates

### Security Effectiveness Metrics
- **Vulnerability Detection**: Percentage of known vulnerabilities identified
- **Time to Remediation**: Average days to patch identified vulnerabilities
- **False Positive Rate**: Percentage of incorrect vulnerability correlations
- **Risk Reduction**: Reduction in security risk scores over time

### Compliance Achievement Metrics
- **License Compliance**: Percentage of components with approved licenses
- **Audit Readiness**: Time to generate compliance reports
- **Regulatory Compliance**: Percentage of regulatory requirements met
- **Exception Rate**: Percentage of components requiring license exceptions

## Tool Integration

### SBOM Generation Tools
- **CycloneDX CLI**: Command-line SBOM generation for multiple ecosystems
- **SPDX Tools**: Comprehensive SPDX document creation and validation
- **Syft**: Container and filesystem SBOM generation
- **Trivy**: Security scanner with SBOM output capabilities

### Vulnerability Management Tools
- **OWASP Dependency-Check**: Comprehensive vulnerability scanning
- **Snyk**: Real-time vulnerability monitoring and remediation
- **Grype**: Vulnerability scanner for containers and filesystems
- **OSV-Scanner**: Open source vulnerability scanner

### License Management Tools
- **ScanCode**: Comprehensive license and copyright detection
- **FOSSology**: Open source license compliance management
- **Licensee**: GitHub's license detection tool
- **ClearlyDefined**: Curated license and component data

---

**Line Count:** 252 lines (target: 200+ lines) ✅
**Skills Validated:** S1 (SBOM Standards), S2 (Vulnerability Correlation), S3 (License Compliance)
**Enables Workflows:** WF-004 (security), WF-008 (compliance), WF-012 (incident response)
**Evidence Gate:** EGD-PROD-2026-012 (SBOM Management capability)

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**End of SBOM Generator Skill**