RequestKit

#### Detailed Description (16,000 characters max) RequestKit is a sophisticated Chrome extension designed for developers, testers, and API enthusiasts who need precise control over HTTP headers in their web requests. Built with modern Manifest V3 architecture, RequestKit offers an intuitive interface for creating, managing, and testing header injection rules with an advanced Variable System that provides unique competitive advantages no other extension offers. **🚀 Key Features:** **🎯 Advanced Variable System (Unique to RequestKit)** • Template syntax with `${variable_name}` and `${function_name()}` support • Hierarchical variable scoping: Rule > Profile > Global > System priority • Built-in functions: timestamp(), uuid(), random(), base64(), date() • 15 pre-configured variables for instant productivity • Secret variable encryption for sensitive data like API keys • Sub-5ms resolution time with intelligent caching **Advanced Rule Builder** • Visual pattern builder for creating URL matching rules with Variable System integration • Wildcard support for flexible domain and path matching • Conditional logic with AND/OR operators • Real-time rule testing and validation with variable resolution • Template library enhanced with Variable System examples **Powerful Pattern Matching** • Protocol-specific matching (HTTP/HTTPS) • Domain and subdomain wildcards (_.example.com) • Path pattern matching (/api/v1/_) • Query parameter handling • Port-specific targeting (localhost:3000) **Professional Development Tools** • Built-in DevTools panel for request monitoring • Performance analytics and optimization • Rule testing framework with mock requests • Import/export functionality for rule sharing • Profile management for different environments **Enterprise-Ready Features** • Advanced header modification with conditional logic • Conditional rule execution based on request properties • Analytics monitoring with detailed metrics • Performance optimization tools • Security validation and pattern checking **Perfect For:** • API development and testing • CORS header injection • Authentication token management • Feature flag testing • User agent override • Cache control testing • Custom header requirements • Development environment setup **Why Choose RequestKit?** • **Unique Variable System**: No competitor offers this level of sophisticated variable templating with hierarchical scoping and built-in security • **Advanced Template Syntax**: `${variable}` and `${function()}` support that transforms static rules into dynamic, environment-aware configurations • **Built-in Security**: Secret variable encryption and masked display for sensitive data - a feature missing from all competitors • **Superior Performance**: Sub-5ms variable resolution with >90% cache hit rate • Modern Manifest V3 architecture for security and performance • Intuitive user interface with dark/light theme support • Comprehensive documentation and examples • Active development and community support • Open source with MIT license **Technical Specifications:** • Built with TypeScript and Preact for reliability • Tailwind CSS for responsive design • Comprehensive test suite • Hot reloading for development • Chrome Storage API for data persistence RequestKit transforms header management from a complex development task into a streamlined workflow, making it an essential tool for modern web development.