NEXUS Claude Code Plugin

The NEXUS plugin brings the power of a 56-agent autonomous software engineering organization directly into Claude Code. Instead of single-agent assistance, you get an entire org with leadership, engineers, designers, QA, and specialists.

Installation

From Claude Code Plugin Marketplace

1. Open Claude Code
2. Go to Settings → Plugins
3. Search for "NEXUS"
4. Install "NEXUS - Enterprise Multi-Agent Orchestration"
5. Restart Claude Code

Manual Installation

# Clone the plugin
git clone https://github.com/Garrett-s-Apps/nexus-plugin.git ~/.claude/plugins/nexus

# Install to Claude Code
claude plugin install ~/.claude/plugins/nexus

Plugin Architecture

The NEXUS plugin consists of three main components:

1. Skills (Auto-Triggered)

Skills automatically activate based on your natural language input:

2. Commands (Manual Invocation)

Slash commands for direct access to NEXUS capabilities:

3. Agent Integration

The plugin includes specialized agents that extend Claude Code's capabilities:

• VP Engineering: Strategic planning and technical architecture
• Senior Engineer: Implementation and code quality
• QA Lead: Quality assurance and testing strategy
• Security Engineer: Security review and vulnerability analysis
• Debug Investigator: Root cause analysis and error investigation

Skills Deep Dive

Autonomous Build Skill

What it does: Transforms high-level requests into complete feature implementations using the full NEXUS organization.

Example usage:

User: "Build me a user authentication API with React frontend"

What happens:

1. Planning Phase: VP of Engineering analyzes requirements
2. Team Building: Dynamically hires specialists (Security Engineer for auth, Frontend Engineer for React)
3. Implementation: Multi-agent parallel execution across backend API, frontend components, database schema
4. Quality Gates: QA Lead reviews, Security Engineer validates
5. Completion: Working code committed to Git with cost report

Key Features:

• Dynamic team composition: VP decides which specialists to hire based on requirements
• Session persistence: Hired agents stay available for follow-up requests
• Parallel workstreams: Frontend, backend, testing, and documentation happen simultaneously
• Zero-tolerance quality: Warnings = errors, comprehensive review gates

Code Review Organization

What it does: Provides multi-perspective code review using 4 specialized reviewers running in parallel.

Reviewers:

• Style Reviewer: Formatting, naming conventions, code idioms
• Quality Reviewer: Logic defects, maintainability, anti-patterns
• Security Reviewer: Vulnerabilities, trust boundaries, authentication
• Performance Reviewer: Algorithmic complexity, memory usage, optimization opportunities

Output: Comprehensive review report with severity ratings and actionable recommendations.

Debug Investigation Skill

What it does: Deep debugging that leverages NEXUS's cross-session memory to find similar past errors and their resolutions.

Process:

1. Error Analysis: Classify the error type and domain
2. Knowledge Retrieval: Search RAG database for similar past errors
3. Pattern Recognition: Identify common failure patterns
4. Solution Synthesis: Combine past solutions with current context
5. Prevention: Suggest changes to prevent similar issues

Knowledge Sources:

• Past error resolutions (weighted 1.3x for high value)
• Task outcomes and lessons learned
• Code change history and their impacts
• Cross-session conversation memory

Semantic Search Skill

What it does: Search institutional knowledge using semantic similarity rather than keyword matching.

Search Modes:

• errors: Past error resolutions and debugging sessions
• tasks: Completed task outcomes and agent performance
• code: Code changes and their impacts
• conversations: Past Q&A and decision discussions
• all: Search across all knowledge types

Example:

/nexus-search --mode errors --domain backend "rate limiting"

Returns:

• Similar past errors with their resolutions
• Agents who successfully handled similar issues
• Cost estimates based on historical data
• Recommended approaches and gotchas to avoid

Commands Reference

/nexus-status

Shows comprehensive organization status:

# 🏢 NEXUS Organization Status

## Agents (56 total)
✓ Executive Layer (10): Chief of Staff, CPO, CFO, CRO, CTO, CISO, COO, CMO, CLO, CDO
✓ Management Layer (10): VP Eng, VP Product, VP Ops, Engineering Managers, Tech Leads
✓ Senior Layer (12): Senior Engineers, Architects, Code Reviewers
✓ Implementation Layer (15): Frontend, Backend, Full-Stack, DevOps, Data Engineers
✓ Quality Layer (6): QA Leads, Test Engineers, Security Engineers
✓ Consultant Layer (3): Security Architect, UX Consultant, Systems Architect

## System Health: ✓ Healthy
- Server: ✓ Running on port 4200
- Databases: ✓ 7 encrypted databases connected
- ML Models: ✓ Agent router, cost predictor trained
- RAG Knowledge: ✓ 1,247 chunks indexed

## Recent Activity (last 5 tasks)
1. [2024-01-15 14:30] Build auth API ($0.42, 45s) ✓
2. [2024-01-15 13:15] Code review PR #123 ($0.18, 22s) ✓

/nexus-hire

Adds specialist agents to your current session:

# Add a security engineer
/nexus-hire security-engineer

# Add a performance engineer
/nexus-hire performance-engineer

# Add a frontend specialist
/nexus-hire frontend-engineer

Available Specialists:

• security-engineer: Authentication, encryption, vulnerability analysis
• performance-engineer: Optimization, caching, scalability
• frontend-engineer: React, Vue, Angular, UI/UX
• backend-engineer: APIs, databases, microservices
• devops-engineer: CI/CD, Docker, Kubernetes
• database-architect: Schema design, queries, migrations

/nexus-debug

Launches targeted debug investigations:

# Debug with domain filtering
/nexus-debug --domain backend "API returning 500 errors"

# Debug with specific error context
/nexus-debug --context "authentication failing after login"

# Debug with file scope
/nexus-debug --files "src/auth/login.py" "login timeout issues"

Parameters:

• --domain: Filter knowledge by domain (frontend, backend, devops, security)
• --context: Additional context for the investigation
• --files: Specific files to focus the investigation on

/nexus-search

Search the knowledge base with advanced filtering:

# Search for error resolutions
/nexus-search --mode errors "database connection timeout"

# Search task outcomes
/nexus-search --mode tasks --domain frontend "React component optimization"

# Search code changes
/nexus-search --mode code "authentication middleware"

# Search conversations
/nexus-search --mode conversations "deployment strategy"

Context Rules System

The plugin automatically attaches relevant project context based on file patterns and @mentions:

File Pattern Rules

@Mention Rules

Integration with NEXUS Server

When the NEXUS server is running (localhost:4200), the plugin provides enhanced capabilities:

Server-Connected Features

• Real-time cost tracking: Live budget monitoring and alerts
• Cross-session memory: Access to full RAG knowledge base
• ML predictions: Cost estimation and agent routing recommendations
• Organizational persistence: Hired agents persist across Claude Code sessions
• Advanced analytics: Performance metrics and optimization suggestions

Offline Mode

When the server isn't available, the plugin operates with reduced functionality:

• Basic skills work with simplified logic
• No cross-session memory or RAG search
• No cost prediction or ML routing
• Limited to single-session agent interactions

Configuration

Plugin Settings

Configure the plugin via .claude-plugin/config.json:

{
  "nexusServerUrl": "http://localhost:4200",
  "defaultModel": "sonnet",
  "maxCostPerSession": 5.00,
  "autoAttachRules": true,
  "enableMLRouting": true,
  "logLevel": "info"
}

Environment Variables

# NEXUS server connection
export NEXUS_SERVER_URL=http://localhost:4200
export NEXUS_API_KEY=your-api-key

# Model preferences
export NEXUS_DEFAULT_MODEL=sonnet
export NEXUS_PLANNING_MODEL=opus
export NEXUS_QA_MODEL=haiku

# Cost controls
export NEXUS_MAX_SESSION_COST=5.00
export NEXUS_ENABLE_COST_ALERTS=true

Use Cases

1. Full Feature Development

User: "Build me a blog system with user auth, posts, and comments"

The autonomous-build skill activates, hiring specialists and delivering:

• Backend API with authentication
• Database schema with migrations
• Frontend components in React/Vue
• Test suites for all components
• Security review and performance optimization
• Complete deployment configuration

2. Code Quality Assurance

User: "Review this authentication module"

The code-review-org skill provides:

• Style and formatting review
• Security vulnerability analysis
• Performance optimization suggestions
• Logic error detection
• Maintainability improvements

3. Debugging Complex Issues

User: "Debug why our API is randomly timing out"

The debug-investigate skill:

• Searches past similar timeout issues
• Analyzes code patterns and dependencies
• Provides resolution steps based on past successes
• Suggests monitoring and prevention measures

4. Knowledge Discovery

User: "Have we built anything like a rate limiter before?"

The semantic-search skill finds:

• Past rate limiting implementations
• Cost and complexity estimates
• Successful approaches and gotchas
• Agent recommendations based on past performance

Best Practices

Getting Maximum Value

1. Be Specific: "Build a REST API with JWT auth" works better than "build an API"
2. Use Natural Language: The plugin understands intent, not just commands
3. Leverage Specialists: Let the VP hire appropriate experts for complex tasks
4. Review Recommendations: The plugin learns from feedback and corrections
5. Connect to Server: Run the NEXUS server for full capabilities

Cost Optimization

1. Use Appropriate Models: Haiku for simple tasks, Opus for complex planning
2. Set Budget Limits: Configure cost alerts and hard caps
3. Leverage Learning: The system gets more efficient as it learns your patterns
4. Batch Related Work: Group similar tasks to maximize specialist efficiency

Security Considerations

1. Review Generated Code: Always review security-sensitive implementations
2. Use Security Engineer: Explicitly hire security engineers for auth/crypto work
3. Follow Compliance: The plugin supports enterprise security workflows when server is connected
4. Audit Trails: All actions are logged when connected to NEXUS server

Troubleshooting

Common Issues

Plugin not activating skills:

• Check trigger phrases match exactly
• Verify plugin is properly installed and enabled
• Restart Claude Code after configuration changes

Server connection issues:

• Verify NEXUS server is running on localhost:4200
• Check firewall settings allow connections
• Validate API key configuration

High costs:

• Set budget limits in configuration
• Use cheaper models for simple tasks (Haiku instead of Opus)
• Enable cost alerts and monitoring

Poor quality outputs:

• Provide more specific requirements
• Use the code-review-org skill for quality assurance
• Connect to NEXUS server for ML-improved routing

Getting Help

1. Documentation: Full docs at buildwithnexus.dev
2. Community: Join the NEXUS Discord for support and discussion
3. Issues: Report bugs on GitHub Issues
4. Enterprise: Contact enterprise@nexus.dev for commercial support

The NEXUS plugin transforms Claude Code from a single-agent assistant into a complete autonomous software engineering organization. Experience the difference of having an entire org working on your projects.