# Preflight Stack Engineering Work

Preflight Stack is a brand-first portfolio for a suite of focused x402 services. The owner acts as founder and product engineer, responsible for product direction, API design, implementation, deployment, documentation, and explicit service boundaries.

The builder is an aviation electrical specialist with more than two decades of experience spanning aircraft maintenance, technical troubleshooting, operations control, and team leadership. As he prepares for the next chapter of his career, he is expanding deeper into networking, software, automation, and development.

Outside of work, he enjoys building things and learning by doing, from homelab infrastructure and networking to agentic APIs, developer tools, and experiments around x402 and machine-to-machine services. Current projects include Preflight Stack and [ORB Trading Lab](https://github.com/techlowneko/ORB-Trading-Lab), an automated Opening Range Breakout research and paper-trading system. He is especially interested in small, practical problems where new technology can make something simpler, faster, or more useful. Serious hobbies include building computers, 3D printing, creative writing, or making tea, currently Yunnan Black Treasure is my favorite!

## Selected work

- [Dependency Preflight](https://preflightstack.com/dependency-preflight/): exact npm and PyPI checks with ALLOW, REVIEW, or BLOCK guidance and evidence.
- [Random Choice](https://preflightstack.com/random-choice/): bounded uniform or weighted selection using cryptographically secure server-side randomness.
- [Temporary File Relay](https://preflightstack.com/temporary-file-relay/): paid temporary artifact handoff with upload verification, expiry, and bounded reads.

## Engineering throughline

- HTTP-native x402 payment semantics.
- Machine-readable OpenAPI and discovery metadata.
- Small, composable API surfaces with explicit input and output contracts.
- Security, privacy, expiry, and usage boundaries documented in plain language.

## Proof

Inspect the [owner's GitHub work](https://github.com/techlowNeko), [live service documentation](https://preflightstack.com/#services), and the authoritative OpenAPI contracts linked from each service page.