How I Manage 400K Lines of Code with Claude Code: A Multi-Agent Development Workflow
A battle-tested workflow for using Claude Code to manage large-scale projects with parallel AI agents working like a distributed engineering team
About Lance
Backend Engineer • Fractional CTO
I'm Lance Rogers, a backend engineer turned fractional CTO who prefers hard infrastructure problems over PowerPoint decks. For the past nine years I've moved between large financial institutions and Web3 startups, writing Go and Python to make sure good ideas survive contact with production traffic.
What I do
Architecture & scale. At Mythical Games I helped design Golang microservices that drive more than 15 million on-chain transactions a month while guaranteeing finality and player safety.
Modernization in high-control environments. Inside Bank of America's Global Security group I rebuilt a 15-year-old codebase, creating a secure CI/CD pipeline that cut deploy cycles from months to hours and returned roughly six developer-months of productivity every year.
Cost and workflow efficiency. For Global Payments I tuned ETL processes and right-sized cloud workloads, saving $40,000/month in AWS costs.
Open-source tooling. I build the tools I want to use—most recently Guild Framework, a 190,000+ line enterprise-grade multi-agent AI orchestration platform (90% complete), and Claude Code Go, the first Golang SDK for Anthropic's developer tools.
How I work
1. Plan first, code once. I focus on planning and make sure I'm solving the right problem before jumping into coding. This saves significant time and ensures my v1 deliverables are high quality in a short amount of time.
2. Systems thinking. I trace features to revenue, latency to user experience, and compliance to risk. That map guides decisions.
3. Knowledge transfer. Clean commits, docs, and walkthroughs are part of the engagement, because velocity matters after I leave.
Whether you're a regulated enterprise wrestling with legacy Python or a blockchain startup chasing the next throughput ceiling, I can help design, harden, and hand off the systems that move you forward, using tools your own engineers will enjoy maintaining. I build reliable systems that scale, save money, and get your engineers back to doing real work.
Experience & Projects
AI & Machine Learning
Guild Framework
Claude Code Go SDK
YouTube Summarizer
AlgoScales
Bank of America Internal ML Automation
SSI Schaefer Warehouse Optimization
Blockchain & Web3
Mythical Games
Dragonchain
ShinySwap
Swapblocks
Charlotte Blockheads
FinTech & Enterprise
Bank of America
PNC Bank
Global Payments
Shutterfly
Guild Framework
Claude Code Go SDK
YouTube Summarizer
AlgoScales
Bank of America Internal ML Automation
SSI Schaefer Warehouse Optimization
Mythical Games
Dragonchain
ShinySwap
Swapblocks
Charlotte Blockheads
Bank of America
PNC Bank
Global Payments
Shutterfly
Guild Framework
Creator & Lead Architect 2024 - PresentEnterprise-grade AI agent orchestration platform representing a significant advancement over single-agent tools like Aider and Claude Code. Built with 190,000+ lines of Go code across 767 files, featuring specialized AI agents working together through medieval guild metaphor. Currently in final development stages before open-source release.
Key Features
Multi-Agent Coordination
Orchestrates specialized 'artisans' (AI agents) for research, coding, design, and documentation with event-driven real-time coordination
Impact: Specialized expertise vs single general-purpose AI
6-Layer Prompt System
Dynamic prompt composition with context-aware templates, vector search integration via ChromemGo for semantic retrieval (RAG)
Impact: Advanced context management and knowledge retrieval
Multi-Provider Support
Integrated with OpenAI, Anthropic, Ollama, DeepSeek, and Ora with failover capabilities
Impact: Vendor-agnostic AI development with reliability
Professional Developer Experience
Rich TUI with markdown rendering, syntax highlighting, session persistence, LSP integration, and 5-column Kanban board
Impact: Visual superiority over plain-text competitors
Achievements
- Architected 190,000+ lines of production-ready Go code with estimated commercial value of $7.4M
- Pioneered multi-agent coordination patterns in AI development tools
- Built enterprise-grade architecture with proper patterns and practices from inception
- 90% complete with production-ready components: chat interface, provider system, storage layer, knowledge management
- Positioning for open-source release and potential commercial applications
Claude Code Go SDK
Author May 2025Go SDK providing a native interface to Claude Code CLI features, enabling developers to build AI-powered applications with Claude's coding capabilities.
Key Features
Full CLI Wrapper
Complete Claude Code CLI wrapper with streaming support and context cancellation
Impact: Native Go interface for Claude Code features
MCP Integration
Model Context Protocol (MCP) integration with multiple output formats (text, JSON, streaming JSON)
Impact: Advanced AI tool integration capabilities
Session Management
Multi-turn conversation support with file processing capabilities
Impact: Production-ready conversational AI features
Cost Optimization
Leverages Claude Max subscription to avoid API costs
Impact: Reduced AI development costs for Go developers
Achievements
- Built comprehensive Go SDK for Claude Code CLI integration
- Implemented streaming support with context cancellation
- Created extensive test suite with unit, integration, and mock server tests
- Provided convenience methods for common AI development use cases
YouTube Summarizer
Creator May 2025CLI tool for summarizing YouTube video transcripts using Ollama for 100% local processing. Supports intelligent transcript extraction, interactive TUI, and research planning features.
Key Features
Local AI Processing
Uses Ollama for 100% local processing without external API keys
Impact: Complete privacy with no external data sharing
Smart Transcript Fetching
Prefers manual captions, supports multiple input formats (.txt, .list, .urls, .csv)
Impact: Flexible input handling with intelligent caption selection
Research Plan Feature
Create focused research plans to extract targeted content across multiple videos
Impact: Comprehensive research document generation from video corpus
Intelligent Processing
Video chunk processing, transcript caching, comprehensive logging
Impact: Efficient processing of long videos with persistent cache
Achievements
- Built privacy-focused YouTube summarization tool with 100% local processing
- Implemented intelligent transcript extraction with manual caption preference
- Created unique research planning feature for multi-video analysis
- Designed for researchers, content creators, and students
AlgoScales
Creator 2025Early-stage open-source algorithm learning tool for coding interview preparation. Built in Go with a terminal-first design to help developers practice 11 fundamental algorithm patterns.
Key Features
Pattern-Based Learning
Organizes coding problems by algorithm patterns (Sliding Window, Two Pointers, etc.) similar to musicians practicing scales
Impact: Structured approach to algorithm pattern recognition
Multiple Practice Modes
Learn, Practice, and Cram modes with progress tracking and daily practice workflow
Impact: Flexible learning experience with built-in accountability
AI Integration
AI-powered hints and explanations using Ollama or Claude Code via custom Go SDK
Impact: Enhanced learning with AI assistance
Editor Integration
Vim plugin for in-editor problem solving, with Neovim and VS Code support planned
Impact: Practice within familiar development environment
Achievements
- Built MVP algorithm practice tool for personal interview preparation
- Implemented Go-based CLI with multi-language support (Go, Python, JavaScript)
- Created Vim plugin for in-editor coding practice
- Integrated AI chat functionality using custom Claude Code Go SDK
Bank of America Internal ML Automation
Contributing Engineer 2017-2018Automated my job by building a neural network using python and numpy to write regular expressions and SQL code based on business requirements.
Key Contributions
Neural Net Data Quality Rule Generator
Generate regular expressions and SQL code based on business requirements
Impact: Reduced workforce requirements
Automated Code Analysis Report Generation
Automated an incredibly tedious business process by building a tool that performed a 3 month excel based analysis in 30 seconds with a button click
Impact: Reduced workforce requirements
Achievements
- Finished 18 month contract work in 6 months
- Delivered tools that automated human processes that cost the bank $4 Million per year
SSI Schaefer Warehouse Optimization
Software Engineer 2016-2017Applied machine learning to robotic warehouse debugging and maintenance scheduling.
Key Contributions
Predictive Analytics
ML models for warehouse efficiency optimization
Impact: Improved maintenance planning, reduced firedrills and system shutdowns
Automation Integration
Integrated ML predictions into warehouse automation systems
Impact: Smarter warehouse operations
Achievements
- Built ML-driven warehouse optimization processes
- Improved operational efficiency through predictive analytics
Mythical Games
Software Engineer, Blockchain Apr 2022 - Apr 2023Blockchain infrastructure development for gaming-focused NFT marketplace handling millions in transactions per day.
Key Projects
NFT Marketplace Backend
Golang microservices handling on-chain transactions
Impact: 15M+ transactions/month with 100% finality
Smart Contract Development
Solidity contracts for gaming and marketplace features
Impact: Audited contracts deployed to production
Cross-Chain Bridge
NFT bridge architecture to mainnet Ethereum
Impact: Enabled asset portability between networks
Key Achievements
- Discovered critical Polygon Edge bug before mainnet launch, quickly migrated nodes to Hyperledger Besu
- Built highly scalable transaction processing system
- Contributed to protocol-level infrastructure decisions
Dragonchain
Senior Software Engineer Jun 2019 - Jan 2020Developed dApps and blockchain infrastructure for enterprise blockchain platform.
Key Projects
dApp Development Platform
Python/Node.js microservices for rapid dApp prototypes and POCs
Impact: Accelerated client project delivery
Cross-Chain Hackathon Platform
Architected platform with weighted voting using time-held coins
Impact: Novel governance mechanism implementation
Den Social Platform
Smart contracts and Go backend for decentralized social media
Impact: Production social media dApp
Key Achievements
- Built multiple production dApps for enterprise clients
- Contributed to core blockchain platform development
- Designed innovative consensus and governance mechanisms
ShinySwap
Architect & Lead Developer Apr 2023 - PausedPersonal project building distributed exchange for physical precious metals trading with DeFi integration.
Key Features
P2P Exchange Architecture
Distributed system for peer-to-peer precious metals trading
Impact: Enabled physical asset liquidity access
Secure Escrow System
On-site verification system for physical asset trades
Impact: Trustless trading of physical assets
DeFi Integration
Bridge to use physical metals in DeFi protocols
Impact: Novel asset class for DeFi
Achievements
- Designed innovative physical-digital asset bridge
- Built secure verification and escrow systems
- Created novel DeFi integration patterns
Swapblocks
Founder/Developer February 2018 - July 2019Designed and developed a subnet blockchain network for automating complex asset transfers with signficant regulatory documentation requirements.
Key Features
Custom Smart Contract Engines
Consortium subnets chose the best contract engine for their particular use case.
Impact: No reliance on niche developers for implementation.
Achievements
- 8000 Member Discord Community
- $10M Marketcap
- 48 Community Run Nodes
- 5 Person Team Paid in SBX Tokens
Charlotte Blockheads
Organizer Sept 2017 - Mar 2020Founded and led major cryptocurrency meetup group in Charlotte, North Carolina.
Achievements
- Built community of 8000+ blockchain enthusiasts and developers
- Provided entry point for many into crypto/blockchain space
- Established Charlotte as a blockchain hub in the Southeast
Bank of America
Senior Software Engineer (Contract) Feb 2024 - Dec 2024Led modernization efforts for one of America's largest financial institutions, focusing on enterprise CI/CD infrastructure and legacy security scanning systems.
Key Projects
CI/CD Pipeline Modernization
Designed and implemented CI/CD pipeline for 15-year-old codebase
Impact: Reduced deploy times from months to hours
Security Scanning Refactor
Modernized legacy Python security scanning software
Impact: Ensured compliance with modern secure coding standards
Developer Productivity Initiative
Automation and process improvements
Impact: Reclaimed 6+ months/year of lost developer time
Key Achievements
- Resolved long-standing security blockers by sanitizing over a decade of sensitive Git history
- Led modernization efforts including documentation, release process automation, and cross-team tooling
- Improved sprint velocity through strategic automation initiatives
PNC Bank
Software Engineer Consultant 2018Conducted comprehensive audit of data processing pipelines for major regional bank.
Key Projects
Pipeline Security Audit
Comprehensive security and accuracy audit of Python data pipelines
Impact: Found coding errors missed in an OCC remediation effort affecting thousands of customers
Key Achievements
- Identified and resolved critical security vulnerabilities in data processing
- Improved data accuracy through pipeline optimization
- Delivered comprehensive security recommendations
Global Payments
Software Engineer Consultant 2019Performance optimization of data processing systems for payment processing company.
Key Projects
ETL Optimization
Performance tuning and cost optimization of ETL processes
Impact: Cut AWS spend by $40K/month
Key Achievements
- Achieved 80% reduction in cloud infrastructure costs
- Improved data processing throughput by 3x
- Implemented cost monitoring and alerting systems
Shutterfly
Software Engineer (Contract) Feb 2020 - Feb 2021Worked on order processing systems for one of the largest photo commerce platforms.
Key Projects
Forge Workflow Enhancement
Enhanced Python-based order workflow engine routing online orders to factory processes
Impact: Improved order processing reliability and throughput
AWS Migration Support
Assisted in migration planning of Forge from on-prem servers to AWS
Impact: Modernized infrastructure for better scalability
Key Achievements
- Improved system reliability and reduced downtime
- Enhanced order routing efficiency
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