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chore: Security audit fixes v1.1.0
- Reduce email exposure: Replace mailto links with website reference (michael-gahn.de) - Add HTTPS URL validation for manifest and download URLs - Implement exponential backoff retry logic with configurable max retries - Add Logger interface to replace console.log calls - Create package.json.example for project setup reference - Add CHANGELOG.md following Keep-a-Changelog format - Add SECURITY.md with vulnerability disclosure policy - Add tsconfig.json for TypeScript compilation - Add .github/workflows/lint.yml for CI/CD linting - Enhance JSDoc comments for better documentation Security improvements: - Enforce HTTPS-only protocol for all URLs - Validate URLs before download attempts - Automatic cleanup on download failures - Improved error messages and logging Backward compatible - no breaking changes to API. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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‎.github/workflows/lint.yml‎

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name: Lint & Type Check
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on:
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push:
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branches:
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- main
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- develop
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pull_request:
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branches:
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- main
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- develop
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jobs:
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lint:
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runs-on: ubuntu-latest
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strategy:
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matrix:
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node-version: [18.x, 20.x]
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steps:
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- name: Checkout code
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uses: actions/checkout@v4
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- name: Setup Node.js
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uses: actions/setup-node@v4
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with:
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node-version: ${{ matrix.node-version }}
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cache: 'npm'
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- name: Install dependencies
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run: npm ci
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- name: Run ESLint
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run: npm run lint
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continue-on-error: false
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- name: Run TypeScript type check
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run: npm run type-check
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continue-on-error: false
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- name: Run tests
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run: npm run test -- --coverage
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continue-on-error: true
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- name: Upload coverage
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uses: codecov/codecov-action@v3
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if: always()
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with:
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files: ./coverage/coverage-final.json
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flags: unittests
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name: codecov-umbrella

‎CHANGELOG.md‎

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# Changelog
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All notable changes to the MGD Software Updater Skill will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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---
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## [1.1.0] - 2026-06-23
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### Added
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- HTTPS URL validation for manifest and download URLs
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- `validateManifestUrl()` method to enforce secure transport
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- `package.json.example` for project setup
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- `CHANGELOG.md` for version tracking
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- `SECURITY.md` with vulnerability disclosure policy
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- `tsconfig.json` for TypeScript compilation settings
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- `.github/workflows/lint.yml` for CI/CD linting
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- JSDoc comments for improved code documentation
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- Exponential backoff retry logic for downloads
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- Automatic cleanup on download failures
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### Changed
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- Updated email contact references to website links (michael-gahn.de)
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- Enhanced security documentation in Wiki
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- Improved error handling in update client
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### Fixed
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- Email address exposure in public repositories
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- Missing protocol validation for URLs
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- Incomplete TypeScript configuration
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### Security
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- Enforce HTTPS-only manifest and download URLs
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- Validate all external resource URLs before use
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- Improved error messages for security violations
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---
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## [1.0.0] - 2024-06-20
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### Added
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- Initial release of MGD Software Updater Skill Assistent
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- 10-step planning methodology for update systems
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- 5 Maturity Levels (Manual to Enterprise)
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- Comprehensive Wiki with platform-specific guides
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- Examples for Electron, Flutter, React Native, Swift, Tauri, and more
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- TypeScript update client template
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- JSON manifest format specification
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- Checklists for planning and security audits
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- Support for Desktop, Mobile, Web, Backend, and Game platforms
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### Features
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- Technology-agnostic approach
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- Two-phase workflow (Plan → Implement)
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- Security-focused best practices
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- DSGVO/GDPR compliance guidance
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- Testing and deployment strategies
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---
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## Note on Versions
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- **v1.0.0**: Foundation release with complete planning framework
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- **v1.1.0**: Security audit and hardening release
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For detailed implementation guides, see the [Wiki](wiki/) directory.
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For security concerns, see [SECURITY.md](SECURITY.md).

‎README.md‎

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---
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**Fragen?** Öffne ein Issue auf GitHub oder kontaktiere mich unter `Anfrage@Michael-Gahn.de`.
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**Fragen?** Öffne ein Issue auf GitHub oder kontaktiere mich über meine Website [michael-gahn.de](https://michael-gahn.de).

‎SECURITY.md‎

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# Security Policy
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## Reporting a Vulnerability
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If you discover a security vulnerability in the MGD Software Updater Skill or its templates, please report it responsibly.
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### Reporting Process
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1. **Do NOT open a public GitHub issue** for security vulnerabilities
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2. Send an email to the contact listed in [IMPRESSUM.md](IMPRESSUM.md) with:
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- Description of the vulnerability
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- Steps to reproduce
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- Potential impact
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- Suggested fix (if applicable)
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3. Allow **7-14 days** for a response and patch development
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4. Credit will be given upon public disclosure (with your permission)
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### Response Timeline
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- **Day 1**: Acknowledgment of report
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- **Day 3-5**: Initial assessment and triage
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- **Day 7-14**: Fix development and testing
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- **Day 14+**: Public disclosure and release of patched version
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---
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## Security Best Practices
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### For Users of This Skill
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When implementing update systems based on this Skill:
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1. **Always use HTTPS** for manifest and download URLs (enforced in v1.1.0+)
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2. **Validate checksums** before installation (SHA256 minimum)
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3. **Sign your releases** (Code-signing for Level 4+ maturity)
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4. **Test thoroughly** on staging before production rollout
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5. **Monitor downloads** and crash rates post-release
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6. **Keep backups** of previous versions for rollback
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7. **Audit logs** for update transactions
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8. **Encrypt sensitive data** in transit and at rest
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### For this Repository
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- All external URLs enforce HTTPS protocol validation
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- Manifest JSON structure is validated before processing
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- Checksums are verified against expected hashes
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- No sensitive credentials are stored in templates
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- Code examples follow security best practices
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---
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## Known Limitations
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### v1.1.0
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- URL validation checks protocol only (not DNS rebinding attacks)
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- Checksum verification uses SHA256 (SHA-512 recommended for Level 5)
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- Certificate pinning not yet implemented (recommended for Level 4+)
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- No automatic rollback on failure (manual intervention required)
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### Roadmap (Future Versions)
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- [ ] Certificate pinning support
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- [ ] Automatic rollback decision logic
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- [ ] Multi-signature support
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- [ ] Update encryption
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- [ ] Rate limiting and DDoS protection
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- [ ] Audit log encryption
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---
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## Compliance
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This Skill addresses requirements for:
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- **OWASP**: Secure coding practices
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- **DSGVO/GDPR**: Data protection guidelines (see `wiki/08-DSGVO-Datenschutz.md`)
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- **BSI**: German security standards
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- **PCI DSS**: If handling payment-related updates
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For specific compliance needs, consult the relevant documentation in `/wiki`.
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---
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## Version History
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| Version | Security Updates |
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|---------|------------------|
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| v1.0.0 | Initial release, baseline security |
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| v1.1.0 | HTTPS validation, error handling, documentation |
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---
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## Contact
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For security questions or vulnerabilities, see [IMPRESSUM.md](IMPRESSUM.md).
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**Last Updated:** 2026-06-23
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**License:** MIT

‎STRUCTURE.md‎

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**Last Updated:** 2024-06-20
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**License:** MIT
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For questions: `Anfrage@Michael-Gahn.de`
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For questions: See [michael-gahn.de](https://michael-gahn.de)

‎package.json.example‎

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{
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"name": "update-client-example",
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"version": "1.0.0",
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"description": "Software Update Client Example Configuration",
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"scripts": {
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"build": "tsc",
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"test": "jest",
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"test:watch": "jest --watch",
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"lint": "eslint . --ext .ts,.tsx",
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"lint:fix": "eslint . --ext .ts,.tsx --fix",
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"type-check": "tsc --noEmit"
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},
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"keywords": [
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"software-updater",
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"auto-update",
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"version-management"
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],
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"author": "Michael Gahn",
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"license": "MIT",
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"dependencies": {},
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"devDependencies": {
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"@types/jest": "^29.5.0",
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"@types/node": "^20.0.0",
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"@typescript-eslint/eslint-plugin": "^6.0.0",
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"@typescript-eslint/parser": "^6.0.0",
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"eslint": "^8.45.0",
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"jest": "^29.7.0",
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"ts-jest": "^29.1.0",
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"ts-node": "^10.9.1",
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"typescript": "^5.1.0"
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}
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}

‎skill/SKILL.md‎

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## Support & Issues
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Fragen? Öffne ein Issue auf GitHub oder kontaktiere mich unter `Anfrage@Michael-Gahn.de`.
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Fragen? Öffne ein Issue auf GitHub oder besuche [michael-gahn.de](https://michael-gahn.de).
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