Independent projects, built to learn by shipping.

Open tooling, interactive web products and early experiments.

Each entry is an independent build by Henry Parker—not a fabricated client case study.

Featured Production System

PastelChat

Production-ready real-time messaging platform supporting multi-tenant messaging across web and desktop clients.

Technology: React.js, Node.js, MongoDB, Socket.io, Electron, OAuth 2.0, JWT
What was built: Full-stack real-time communication platform supporting 50+ active users and 1,000+ daily messages without critical production incidents. Implemented Google & Microsoft OAuth 2.0 with JWT sessions, MongoDB index optimization reducing cold starts from ~30s to <2s, and automated CI/CD deployments with 99.5% availability.

Live Demo GitHub

ReproSpec evidence capture and sandboxed replay workflow

Open Source Tooling

RepoSpec

Portable evidence capture and sandboxed replay CLI toolkit for reproducible bug diagnostics.

Tech: Node.js, JavaScript, TypeScript, CLI, Docker, SHA-256, npm

Built an open specification and Node.js CLI to capture tamper-evident bug diagnostics. Features configurable regex redaction, cryptographic SHA-256 verification, and isolated Docker execution copy replay.

GitHub

HP OSAI Operating System

AI Platform Architecture

HP OS

Unified local-first AI operating environment integrating backend microservices, an AI Agent runtime, and workflow automation.

Tech: Python, Node.js, PostgreSQL, MongoDB, Redis, RabbitMQ, Docker

Architected asynchronous task orchestration, persistent PostgreSQL/MongoDB/Redis state layers, and modular local generative AI studio applications communicating over internal APIs.

GitHub

Explore more systems, experiment repositories, and open codebases on GitHub.

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