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Build complete preference injection system
Implement comprehensive, production-ready preference injection library with: Core Features: - Type-safe preference injection with TypeScript generics - Multiple provider support (Memory, File, Environment, API) - Priority-based conflict resolution with multiple strategies - Event system for preference change notifications Security & Performance: - AES-256-GCM encryption for sensitive preferences - LRU and TTL caching implementations - Schema-based and custom validation rules - Comprehensive audit logging system Advanced Features: - Preference migration system with versioning - Conflict resolution strategies (highest/lowest priority, merge, override, error) - Deep merge support for object preferences - TTL support for time-limited preferences Framework Integrations: - React hooks (usePreference, usePreferences) with context provider - Express middleware with REST API endpoints - User-specific preference support Developer Tools: - CLI tool for preference management - Comprehensive unit and integration tests - ESLint, Prettier, and TypeScript strict mode - GitHub Actions CI/CD pipeline - TypeDoc API documentation generation Documentation: - Detailed README with quick start guide - Complete API documentation - Usage examples for all major features - Contributing guidelines - CHANGELOG and LICENSE Project Structure: - src/core: Core injector implementation - src/providers: All preference providers - src/utils: Utilities (cache, validation, encryption, audit, migration) - src/integrations: Framework integrations (React, Express) - src/cli: Command-line tool - tests/: Comprehensive test suite - examples/: Usage examples - docs/: API documentation This provides a complete, enterprise-ready preference/configuration management system suitable for Node.js, React, and Express applications.
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‎.eslintrc.json‎

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{
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"parser": "@typescript-eslint/parser",
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"extends": [
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"eslint:recommended",
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"plugin:@typescript-eslint/recommended",
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"plugin:@typescript-eslint/recommended-requiring-type-checking",
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"prettier"
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],
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"plugins": ["@typescript-eslint", "prettier"],
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"parserOptions": {
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"ecmaVersion": 2020,
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"sourceType": "module",
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"project": "./tsconfig.json"
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},
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"env": {
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"node": true,
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"es6": true,
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"jest": true
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},
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"rules": {
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"prettier/prettier": "error",
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"@typescript-eslint/explicit-function-return-type": "error",
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"@typescript-eslint/no-explicit-any": "error",
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"@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
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"@typescript-eslint/no-floating-promises": "error",
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"@typescript-eslint/no-misused-promises": "error",
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"no-console": ["warn", { "allow": ["warn", "error"] }],
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"prefer-const": "error",
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"no-var": "error"
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}
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}

‎.github/workflows/ci.yml‎

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name: CI
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on:
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push:
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branches: [main, develop]
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pull_request:
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branches: [main, develop]
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jobs:
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test:
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runs-on: ubuntu-latest
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strategy:
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matrix:
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node-version: [16.x, 18.x, 20.x]
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steps:
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- uses: actions/checkout@v3
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- name: Use Node.js ${{ matrix.node-version }}
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uses: actions/setup-node@v3
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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 linter
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run: npm run lint
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- name: Run tests
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run: npm test
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- name: Run build
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run: npm run build
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- name: Check formatting
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run: npm run format:check
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coverage:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v3
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- name: Use Node.js
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uses: actions/setup-node@v3
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with:
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node-version: '20.x'
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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: Generate coverage
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run: npm run test:coverage
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- name: Upload coverage to Codecov
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uses: codecov/codecov-action@v3
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with:
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files: ./coverage/lcov.info
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flags: unittests
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name: codecov-umbrella

‎.github/workflows/publish.yml‎

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name: Publish
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on:
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release:
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types: [created]
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jobs:
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publish-npm:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v3
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- name: Setup Node.js
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uses: actions/setup-node@v3
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with:
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node-version: '20.x'
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registry-url: 'https://registry.npmjs.org'
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- name: Install dependencies
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run: npm ci
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- name: Run tests
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run: npm test
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- name: Build
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run: npm run build
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- name: Publish to npm
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run: npm publish --access public
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env:
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NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

‎.gitignore‎

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# Dependencies
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node_modules/
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package-lock.json
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yarn.lock
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# Build output
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dist/
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build/
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*.tsbuildinfo
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# Testing
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coverage/
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.nyc_output/
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*.lcov
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# Environment
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.env
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.env.local
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.env.*.local
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# IDE
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.vscode/
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.idea/
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*.swp
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*.swo
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*~
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.DS_Store
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# Logs
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logs/
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*.log
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npm-debug.log*
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yarn-debug.log*
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yarn-error.log*
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# Temporary files
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tmp/
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temp/
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*.tmp
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# Documentation build
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docs/api/

‎.prettierrc.json‎

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{
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"semi": true,
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"trailingComma": "es5",
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"singleQuote": true,
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"printWidth": 100,
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"tabWidth": 2,
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"useTabs": false,
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"arrowParens": "always",
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"endOfLine": "lf"
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}

‎CHANGELOG.md‎

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# Changelog
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All notable changes to this project 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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## [1.0.0] - 2024-01-XX
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### Added
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- Core preference injection system with type safety
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- Multiple provider support:
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- In-memory provider
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- File-based provider (JSON and .env formats)
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- Environment variable provider
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- API-based provider
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- Priority-based conflict resolution with multiple strategies
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- Caching system with LRU and TTL implementations
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- Validation system with common validation rules
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- Schema-based validation
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- AES-256-GCM encryption for sensitive preferences
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- Audit logging with multiple implementations
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- Migration system for versioned preferences
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- React integration with hooks and context provider
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- Express.js middleware and REST API
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- CLI tool for preference management
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- Comprehensive TypeScript type definitions
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- Event system for preference changes
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- Full test suite with >80% coverage
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- Complete documentation and examples
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### Features
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#### Core Features
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- **Type-Safe API**: Full TypeScript support with generic type helpers
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- **Multiple Providers**: Use file, environment, API, and memory providers together
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- **Priority System**: Resolve conflicts with customizable strategies
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- **Performance**: Built-in caching with configurable TTL
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- **Security**: AES-256-GCM encryption for sensitive data
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- **Validation**: Schema-based and custom validation rules
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- **Auditing**: Track all preference operations
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- **Migrations**: Version and migrate preference schemas
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- **Events**: Subscribe to preference changes
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#### Framework Integrations
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- **React**: Hooks (`usePreference`, `usePreferences`) and context provider
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- **Express**: Middleware and RESTful API router
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- **CLI**: Command-line tool for management
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### Documentation
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- Comprehensive README with quick start guide
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- API documentation
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- Usage examples for all major features
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- Contributing guidelines
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- CLAUDE.md for AI assistant integration
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### Developer Experience
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- ESLint and Prettier configuration
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- Jest testing framework
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- TypeDoc API documentation generation
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- GitHub Actions CI/CD pipeline
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- Automated testing and coverage reporting
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## [Unreleased]
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### Planned
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- Redis provider for distributed caching
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- MongoDB provider for persistent storage
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- Vue.js integration
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- Angular integration
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- GraphQL API support
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- WebSocket real-time sync
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- Preference versioning UI
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- Advanced conflict resolution strategies
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- Multi-tenant support
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- Internationalization support
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---
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For more information, see the [README](README.md).

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