# CLI.js Application Specification

## Overview

This document provides a human-readable specification of the compiled TypeScript CLI application found in `cli.js`.

## Application Metadata

- **Name**: code
- **Version**: 1.0.18
- **Type**: ESM Module (CommonJS compiled with webpack)
- **Binary**: cli.js (linked to "del" command)
- **Runtime**: Node.js >=18.0.0
- **File Size**: ~2.7MB (minified/bundled)
- **Format**: Webpack-compiled bundle with symbol stripping

## Core Architecture

### Module System

- Built using ES6 modules and CommonJS
- Webpack bundled with UMD pattern
- Dynamic require functionality via `createRequire`
- Module factory pattern with closure-based loading

### Key Components Identified

#### 1. Shell Command Processing

- Shell command parsing and escaping functionality
- Support for complex shell operators: `||`, `&&`, `;;`, `|&`, `<(`, `<<<`, `>>`, `>&`, `<&`
- Quote handling for single and double quotes
- Variable substitution with `${}` syntax
- Pattern matching and globbing support

#### 2. Error Handling & Monitoring

- **Sentry Integration**: Comprehensive error tracking and monitoring
  - Error capture and reporting
  - Performance monitoring
  - User session tracking
  - Exception aggregation
  - Stack trace processing
  - DSN (Data Source Name) handling for Sentry configuration

#### 3. Instrumentation & Event Handling

- Console output instrumentation
- DOM event handling (click, keypress)
- XHR/Fetch request monitoring
- History API instrumentation
- Global error and unhandled rejection handlers

#### 4. Utility Functions

- **String Manipulation**:
  - Text truncation and snipping
  - Pattern matching
  - String escaping and encoding
- **Object Manipulation**:
  - Deep object normalization
  - Property extraction
  - Type checking utilities
- **Path Handling**:
  - Cross-platform path resolution
  - File path normalization
  - URL processing

#### 5. Network & API Support

- HTTP/HTTPS request handling
- Fetch API support with native detection
- Request data extraction and processing
- Rate limiting support
- Retry mechanisms with exponential backoff

#### 6. Browser/Node.js Environment Detection

- Runtime environment detection
- Browser vs Node.js feature detection
- Global object access abstraction
- Cross-platform compatibility layers

## Key Features

### 1. CLI Command Processing

- Advanced shell command parsing
- Support for complex shell syntax
- Environment variable substitution
- Globbing and pattern matching

### 2. Error Monitoring

- Integration with Sentry for error tracking
- Automatic error capture
- Performance monitoring
- User session tracking
- Stack trace enhancement

### 3. Event Instrumentation

- DOM event capture
- Network request monitoring
- Console output tracking
- History navigation tracking

### 4. Cross-Platform Support

- Works in both browser and Node.js environments
- Automatic environment detection
- Platform-specific feature adaptation

### 5. Security Features

- Command injection detection
- Safe shell escaping
- Input sanitization
- Secure handling of user data

## Technical Implementation

### Module Loading Strategy

```javascript
// Core module factory pattern
var z = (A, B) => () => (B || A((B = { exports: {} }).exports, B), B.exports);

// Property definition helper
var jp = (A, B) => {
  for (var Q in B)
    aw1(A, Q, {
      get: B[Q],
      enumerable: !0,
      configurable: !0,
      set: (I) => (B[Q] = () => I),
    });
};
```

### Environment Detection

```javascript
// Global object detection across environments
var wE1 =
  (typeof globalThis == "object" && X21(globalThis)) ||
  (typeof window == "object" && X21(window)) ||
  (typeof self == "object" && X21(self)) ||
  (typeof global == "object" && X21(global)) ||
  (function () {
    return this;
  })() ||
  {};
```

### Error Handling Strategy

- Comprehensive error capture with Sentry SDK
- Stack trace processing and enhancement
- Exception grouping and deduplication
- Performance monitoring integration

## Security Considerations

### Command Injection Protection

- Input sanitization for shell commands
- Safe escaping of special characters
- Pattern validation for command arguments

### Error Information Security

- Sensitive data filtering in error reports
- Stack trace sanitization
- Secure error transmission to monitoring services

## Performance Optimizations

### Bundle Optimization

- Webpack compilation with tree shaking
- Symbol stripping for smaller bundle size
- Efficient module loading with lazy evaluation

### Runtime Optimization

- Memoization for expensive operations
- LRU caching for frequently accessed data
- Efficient string processing algorithms

## Dependencies

Based on the code analysis, the application includes:

1. **Sentry SDK** - Error monitoring and performance tracking
2. **Shell parsing libraries** - Command line processing
3. **Cross-platform utilities** - Browser/Node.js compatibility
4. **HTTP client libraries** - Network request handling
5. **Path manipulation utilities** - File system operations

## Configuration

The application supports configuration through:

- Environment variables
- DSN configuration for Sentry
- Runtime feature detection
- Platform-specific settings

## Usage Context

This appears to be a CLI tool that:

1. Processes shell commands with advanced parsing
2. Provides comprehensive error monitoring
3. Supports both browser and Node.js environments
4. Includes security features for safe command execution
5. Offers performance monitoring and analytics

The "del" binary name suggests this might be a deletion utility with enhanced error handling and monitoring capabilities.