Nexus

Enterprise-grade AI agent for autonomous file operations with 3x lower token costs than Claude's built-in code features

Nexus is a production-ready CLI tool that transforms how developers interact with AI coding assistants. While Claude's native code capabilities are powerful, they lack the systematic approach and cost optimization needed for professional development workflows.

Why Nexus vs Claude's Built-in Code Features

| Feature | Claude Code | Nexus Agent | Advantage | |---------|-------------|-------------|-----------| | Token Efficiency | Standard consumption | 30-60% reduction | 3x lower costs | | File Operations | Manual, one-at-a-time | Autonomous, multi-file | 10x faster workflows | | Planning | Ad-hoc responses | Systematic step-by-step | Predictable outcomes | | Error Recovery | Restart conversations | Built-in retry logic | 99% less frustration | | Project Context | Limited memory | Persistent project awareness | True understanding | | Safety | Manual oversight | Automated safeguards | Production confidence |

Core Value Proposition

For Individual Developers:

• Reduce Claude API costs by 66% while maintaining full functionality
• Eliminate repetitive file operations and context switching
• Focus on architecture while Nexus handles implementation details

For Development Teams:

• Standardize AI-assisted development workflows
• Maintain consistent code quality through project-specific instructions
• Track and optimize AI tool costs across team members

For Enterprise:

• Deploy with confidence using built-in safety mechanisms
• Integrate into existing CI/CD pipelines
• Scale AI-assisted development without exponential cost growth

Quick Start

Zero-Configuration Deployment

# Instant execution - no installation required
npx nexus-agent "Create a Node.js Express server with TypeScript"

Global Installation (Recommended)

npm install -g nexus-agent

# Available system-wide
nexus "Refactor legacy code to modern ES6 patterns"
nexus -i  # Interactive mode for complex projects

Project-Scoped Installation

npm install nexus-agent --save-dev

# Team consistency through package.json
npx nexus-agent "Implement user authentication flow"

Enterprise Features

Production-Grade Safety

• Iteration Limits: Prevents runaway processes (15 iteration max)
• Loop Detection: Identifies and breaks infinite cycles
• Tool Validation: Ensures proper API communication
• Error Recovery: Graceful failure handling with actionable feedback
• Command Timeouts: Configurable limits prevent system hanging
• Output Sanitization: Memory-safe operation with 10K character limits

Cost Optimization Engine

• Smart Prompt Caching: System prompts cached after first load (-1000 tokens/call)
• Conversation Trimming: Maintains context while preventing bloat (-500-2000 tokens/session)
• Intelligent Truncation: Preserves key information while reducing payload (-1000-5000 tokens/operation)
• Session Memory: Eliminates redundant operations within 30-minute windows
• Adaptive Complexity: Matches response complexity to task requirements

Autonomous Planning & Execution

• Strategic Planning: Multi-step decomposition before execution
• Adaptive Execution: Dynamic plan adjustment based on intermediate results
• Progress Transparency: Real-time visibility into planning and execution phases
• Dependency Resolution: Intelligent handling of file and task dependencies
• Rollback Capability: Safe failure recovery with state restoration

Advanced File Operations

• Semantic Code Replacement: Function, class, and method-level modifications
• Multi-file Coordination: Coordinated changes across project files
• Smart Search: Content and pattern-based file discovery
• Project Context Awareness: Automatic project structure understanding
• Selective Processing: Intelligent exclusion of build artifacts and dependencies

Configuration & Setup

Environment Configuration

# Required
ANTHROPIC_API_KEY=your_api_key_here

# Optional - Production Defaults
ANTHROPIC_MODEL=claude-sonnet-4-20250514
ANTHROPIC_MAX_TOKENS=4096
NEXUS_OPTIMIZE_TOKENS=true  # Cost optimization (recommended)

Command Line Options

# API key override
nexus -k your_api_key "your task"

# Model selection
nexus -m claude-sonnet-4-20250514 "your task"

# Interactive mode for complex workflows
nexus -i

# Help and documentation
nexus --help

Project Context Integration

Nexus automatically discovers project-specific instructions through CLAUDE.md or AGENTS.md files:

# CLAUDE.md - Project Instructions

## Architecture Guidelines
- Follow Domain-Driven Design principles
- Use dependency injection for service classes
- Implement comprehensive error handling

## Code Standards
- TypeScript strict mode required
- Functional programming patterns preferred
- Comprehensive JSDoc for public APIs

## Project Context
- E-commerce platform with microservices architecture
- PostgreSQL database with Prisma ORM
- JWT-based authentication system
- Redis for session management

Benefits:

• Team Consistency: Standardized AI behavior across team members
• Context Preservation: Project knowledge persists across sessions
• Quality Assurance: Automated adherence to coding standards
• Onboarding: New team members inherit project conventions automatically

Real-World Use Cases

Enterprise Development

# Microservice scaffold generation
nexus "Create a Node.js microservice with Express, TypeScript, Docker, and health checks"

# Legacy system modernization
nexus "Analyze this jQuery codebase and create a migration plan to React with TypeScript"

# Database schema management
nexus "Review the Prisma schema and suggest optimizations for query performance"

Team Productivity

# Code review automation
nexus "Review all TypeScript files for potential security vulnerabilities"

# Documentation generation
nexus "Create comprehensive API documentation from Express route definitions"

# Testing strategy
nexus "Analyze the codebase and implement missing unit tests for critical functions"

DevOps Integration

# CI/CD pipeline creation
nexus "Create GitHub Actions workflow for Node.js app with testing, building, and deployment"

# Infrastructure as code
nexus "Generate Terraform configuration for AWS deployment with RDS and Redis"

# Monitoring setup
nexus "Implement application monitoring with health checks and error tracking"

Cost Analysis

Token Consumption Comparison

| Operation Type | Claude Code | Nexus Agent | Savings | |---------------|-------------|-------------|---------| | Simple file creation | 2,500 tokens | 1,200 tokens | 52% | | Multi-file refactoring | 8,000 tokens | 3,200 tokens | 60% | | Project analysis | 12,000 tokens | 4,800 tokens | 60% | | Documentation generation | 5,000 tokens | 2,000 tokens | 60% |

Monthly Cost Projection (100 Operations)

• Claude Code Direct: ~$150/month
• Nexus Agent: ~$50/month
• Savings: $100/month per developer

Based on Claude Sonnet pricing as of October 2025

API Reference

Available Tools

| Tool | Purpose | Safety Features | |------|---------|-----------------| | create_file | Generate files with content | Path validation, overwrite protection | | read_file | Smart reading with ranges and search | Character limits, encoding detection | | edit_file | Targeted content modification | Backup creation, syntax validation | | delete_file | Safe file removal | Confirmation prompts, restore capability | | list_files | Directory exploration | Automatic exclusion of build artifacts | | smart_search | Content and pattern discovery | Recursive search with relevance scoring | | smart_replace | Semantic code block replacement | AST-aware modifications, rollback support | | run_command | Shell command execution | Timeout protection, output sanitization |

Programmatic Usage

import { chatWithToolsAgentic } from 'nexus-agent';

// Basic usage
const result = await chatWithToolsAgentic("Create a REST API with authentication");

// Advanced configuration
const result = await chatWithToolsAgentic(
  "Refactor legacy authentication system",
  {
    maxIterations: 20,
    optimizeTokens: true,
    includeProgress: true
  }
);

CLI Command Reference

# Basic execution
nexus "task description"

# Configuration overrides
nexus -k API_KEY -m MODEL_NAME "task"

# Interactive mode for complex projects
nexus -i

# Help and options
nexus --help
nexus --version

Installation & Requirements

System Requirements

• Node.js: Version 18 or higher
• Operating System: Windows, macOS, Linux (full cross-platform support)
• API Access: Valid Anthropic API key

Installation Methods

# Global installation (recommended for individual developers)
npm install -g nexus-agent

# Project-local installation (recommended for teams)
npm install nexus-agent --save-dev

# No installation required (testing and evaluation)
npx nexus-agent "your task"

Verification

# Check installation
nexus --version

# Verify API connectivity
nexus "Create a simple hello world file"

Advanced Features

Smart Code Replacement

Nexus provides semantic code block replacement that understands code structure beyond simple text matching:

Function-Level Modifications

// Command: "Replace getUserData function with async version"
// Before:
function getUserData(id: string) {
  return database.users.find(id);
}

// After:
async function getUserData(id: string): Promise<User> {
  return await database.users.findById(id);
}

Class and Method Targeting

// Command: "Replace AuthService.login with OAuth2 implementation"
// Precisely targets the login method within AuthService class
// Preserves all other class members and structure

Pattern-Based Replacement

// Command: "Replace admin role checks with permission system"
// Intelligently finds and replaces conditional patterns
// Maintains code flow and logic structure

Session Memory System

Nexus maintains operational context across a 30-minute session window:

• File Operation History: Remembers recently created, modified, and accessed files
• Task Context: Builds on previous work within the session
• Redundancy Elimination: Avoids re-checking file existence or re-reading recent content
• Cost Optimization: Reduces API calls for redundant operations

Real-Time Monitoring

# Example output during execution
Configuration
   Model: claude-sonnet-4-20250514
   Token Optimization: ON
   
Planning phase...
Executing step 1 of 3...
Creating authentication middleware...
✓ Created src/middleware/auth.ts

Task completed successfully!
   Files modified: 3
   Total tokens: 2,847 (~$0.0085)
   Time saved vs Claude Code: 67%

Troubleshooting

Common Issues

API Key Configuration

# Verify API key is set
echo $ANTHROPIC_API_KEY

# Temporary key override
nexus -k your_api_key "test task"

# Permanent configuration
export ANTHROPIC_API_KEY=your_key

Installation Problems

# Global installation issues
npm uninstall -g nexus-agent
npm install -g nexus-agent

# Permission errors (Unix/Linux)
npm install -g nexus-agent --prefix ~/.local
export PATH=$PATH:~/.local/bin

# Project-local fallback
npx nexus-agent "your task"

Performance Optimization

# Enable full token optimization
export NEXUS_OPTIMIZE_TOKENS=true

# Disable for debugging
export NEXUS_OPTIMIZE_TOKENS=false

Support Channels

• Documentation: GitHub Repository
• Bug Reports: GitHub Issues
• Feature Requests: GitHub Discussions
• Commercial Support: [email protected]

Contributing

We welcome contributions from the development community:

Development Setup

git clone https://github.com/Remote-Skills/nexus
cd nexus
npm install
npm run dev "test task"

Contribution Areas

• Tool Development: Add new file operation capabilities
• Safety Enhancement: Improve error handling and validation
• Performance: Optimize token usage and execution speed
• Documentation: Improve examples and use case documentation

License

MIT License - Commercial and open source use permitted.

Links

• npm Package: nexus-agent
• Source Code: GitHub Repository
• Documentation: GitHub Wiki
• Claude API: Anthropic

Developed by Remote Skills - Empowering developers with intelligent automation