Green Harbor Labs

AI-assisted engineering studio

Building software at the edge of AI and engineering craft.

Green Harbor Labs creates developer tools, backend systems, prototypes, and web products with production-grade thinking.

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Products

Products from the Lab

Open-source tools for developers building at the intersection of AI, knowledge, and programmable payments.

Open Source

Developer Tool / Spring Boot Starter

Paygate

Paygate is a Spring Boot starter that adds L402 and MPP payment-gated authentication to Java APIs.

  • Java 25
  • Spring Boot
  • Spring Security
  • Lightning
  • L402
  • MPP
  • LNbits
  • LND
View Paygate
Open Source

AI Knowledge Tool / Developer Workflow

Harbor Mind CLI

Harbor Mind turns an Obsidian vault into a searchable, evidence-grounded knowledge system for people and AI agents.

  • Java 25
  • Spring Boot
  • Spring AI
  • PGVector
  • PostgreSQL
  • LM Studio
  • MCP
  • Obsidian
View Harbor Mind CLI

Approach

AI as an Engineering Multiplier

Green Harbor Labs uses AI across the software delivery lifecycle to move faster while keeping architecture, security, and maintainability in focus.

  1. 01

    Frame

    Define the product bet, user workflow, constraints, and the smallest useful proof point.

  2. 02

    Design the system

    Turn the product shape into architecture, data flow, interfaces, and failure modes before code expands.

  3. 03

    Build with agents

    Use AI to accelerate implementation while engineers keep ownership of boundaries, tradeoffs, and review.

  4. 04

    Verify

    Exercise the product through tests, browser QA, security checks, and production-minded edge cases.

  5. 05

    Ship and learn

    Release the working slice, study what changed, and feed the next cycle with sharper evidence.

Capabilities

Engineering Capabilities

Deep Java and Spring Boot experience, extended by AI-assisted workflows into the right tools, stacks, and protocols for each product.

Backend

  • Java
  • Spring Boot
  • Spring Security
  • REST APIs
  • event-driven systems
  • data modeling

AI Workflows

  • AI coding agents
  • architecture exploration
  • model-assisted development
  • automation
  • rapid prototyping

Bitcoin & Payments

  • Bitcoin
  • Lightning
  • L402
  • payment-gated APIs
  • LNbits
  • LND

Frontend

  • React
  • Next.js
  • TypeScript
  • Tailwind CSS
  • responsive UI
  • product interfaces

Cloud & Data

  • cloud architecture
  • event-driven workflows
  • data pipelines
  • relational data modeling
  • graph-backed applications
  • batch processing

Product Delivery

  • PRDs
  • MVPs
  • internal tools
  • technical documentation
  • QA workflows
  • shipping discipline

About

About Green Harbor Labs

Green Harbor Labs is a place for building, testing, and shipping AI-assisted software products, experiments, and tools.

The lab focuses on practical software: useful products, clean systems, thoughtful architecture, and fast iteration powered by modern AI workflows.